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<!DOCTYPE html><html lang="en"><head><meta charset="utf-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><meta name="generator" content="rustdoc"><meta name="description" content="Wrapper around `[u8]` to serialize and deserialize efficiently."><title>Bytes in serde_bytes - Rust</title><script>if(window.location.protocol!=="file:")document.head.insertAdjacentHTML("beforeend","SourceSerif4-Regular-6b053e98.ttf.woff2,FiraSans-Regular-0fe48ade.woff2,FiraSans-Medium-e1aa3f0a.woff2,SourceCodePro-Regular-8badfe75.ttf.woff2,SourceCodePro-Semibold-aa29a496.ttf.woff2".split(",").map(f=>`<link rel="preload" as="font" type="font/woff2" crossorigin href="../static.files/${f}">`).join(""))</script><link rel="stylesheet" href="../static.files/normalize-9960930a.css"><link rel="stylesheet" href="../static.files/rustdoc-46132b98.css"><meta name="rustdoc-vars" data-root-path="../" data-static-root-path="../static.files/" data-current-crate="serde_bytes" data-themes="" data-resource-suffix="" data-rustdoc-version="1.85.0 (4d91de4e4 2025-02-17)" data-channel="1.85.0" data-search-js="search-75f5ac3e.js" data-settings-js="settings-0f613d39.js" ><script src="../static.files/storage-59e33391.js"></script><script defer src="sidebar-items.js"></script><script defer src="../static.files/main-5f194d8c.js"></script><noscript><link rel="stylesheet" href="../static.files/noscript-893ab5e7.css"></noscript><link rel="alternate icon" type="image/png" href="../static.files/favicon-32x32-6580c154.png"><link rel="icon" type="image/svg+xml" href="../static.files/favicon-044be391.svg"></head><body class="rustdoc struct"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="mobile-topbar"><button class="sidebar-menu-toggle" title="show sidebar"></button></nav><nav class="sidebar"><div class="sidebar-crate"><h2><a href="../serde_bytes/index.html">serde_<wbr>bytes</a><span class="version">0.11.17</span></h2></div><div class="sidebar-elems"><section id="rustdoc-toc"><h2 class="location"><a href="#">Bytes</a></h2><h3><a href="#fields">Fields</a></h3><ul class="block structfield"><li><a href="#structfield.bytes" title="bytes">bytes</a></li></ul><h3><a href="#implementations">Methods</a></h3><ul class="block method"><li><a href="#method.new" title="new">new</a></li></ul><h3><a href="#deref-methods-%5Bu8%5D">Methods from Deref<<wbr>Target=[u8]></a></h3><ul class="block deref-methods"><li><a href="#method.align_to" title="align_to">align_to</a></li><li><a href="#method.align_to_mut" title="align_to_mut">align_to_mut</a></li><li><a href="#method.array_chunks" title="array_chunks">array_chunks</a></li><li><a href="#method.array_chunks_mut" title="array_chunks_mut">array_chunks_mut</a></li><li><a href="#method.array_windows" title="array_windows">array_windows</a></li><li><a href="#method.as_array" title="as_array">as_array</a></li><li><a href="#method.as_ascii" title="as_ascii">as_ascii</a></li><li><a href="#method.as_ascii_unchecked" title="as_ascii_unchecked">as_ascii_unchecked</a></li><li><a href="#method.as_bytes" title="as_bytes">as_bytes</a></li><li><a href="#method.as_chunks" title="as_chunks">as_chunks</a></li><li><a href="#method.as_chunks_mut" title="as_chunks_mut">as_chunks_mut</a></li><li><a href="#method.as_chunks_unchecked" title="as_chunks_unchecked">as_chunks_unchecked</a></li><li><a href="#method.as_chunks_unchecked_mut" title="as_chunks_unchecked_mut">as_chunks_unchecked_mut</a></li><li><a href="#method.as_flattened" title="as_flattened">as_flattened</a></li><li><a href="#method.as_flattened_mut" title="as_flattened_mut">as_flattened_mut</a></li><li><a href="#method.as_mut_array" title="as_mut_array">as_mut_array</a></li><li><a href="#method.as_mut_ptr" title="as_mut_ptr">as_mut_ptr</a></li><li><a href="#method.as_mut_ptr_range" title="as_mut_ptr_range">as_mut_ptr_range</a></li><li><a href="#method.as_ptr" title="as_ptr">as_ptr</a></li><li><a href="#method.as_ptr_range" title="as_ptr_range">as_ptr_range</a></li><li><a href="#method.as_rchunks" title="as_rchunks">as_rchunks</a></li><li><a href="#method.as_rchunks_mut" title="as_rchunks_mut">as_rchunks_mut</a></li><li><a href="#method.as_simd" title="as_simd">as_simd</a></li><li><a href="#method.as_simd_mut" title="as_simd_mut">as_simd_mut</a></li><li><a href="#method.as_str" title="as_str">as_str</a></li><li><a href="#method.binary_search" title="binary_search">binary_search</a></li><li><a href="#method.binary_search_by" title="binary_search_by">binary_search_by</a></li><li><a href="#method.binary_search_by_key" title="binary_search_by_key">binary_search_by_key</a></li><li><a href="#method.chunk_by" title="chunk_by">chunk_by</a></li><li><a href="#method.chunk_by_mut" title="chunk_by_mut">chunk_by_mut</a></li><li><a href="#method.chunks" title="chunks">chunks</a></li><li><a href="#method.chunks_exact" title="chunks_exact">chunks_exact</a></li><li><a href="#method.chunks_exact_mut" title="chunks_exact_mut">chunks_exact_mut</a></li><li><a href="#method.chunks_mut" title="chunks_mut">chunks_mut</a></li><li><a href="#method.clone_from_slice" title="clone_from_slice">clone_from_slice</a></li><li><a href="#method.concat" title="concat">concat</a></li><li><a href="#method.connect" title="connect">connect</a></li><li><a href="#method.contains" title="contains">contains</a></li><li><a href="#method.copy_from_slice" title="copy_from_slice">copy_from_slice</a></li><li><a href="#method.copy_within" title="copy_within">copy_within</a></li><li><a href="#method.element_offset" title="element_offset">element_offset</a></li><li><a href="#method.ends_with" title="ends_with">ends_with</a></li><li><a href="#method.eq_ignore_ascii_case" title="eq_ignore_ascii_case">eq_ignore_ascii_case</a></li><li><a href="#method.escape_ascii" title="escape_ascii">escape_ascii</a></li><li><a href="#method.fill" title="fill">fill</a></li><li><a href="#method.fill_with" title="fill_with">fill_with</a></li><li><a href="#method.first" title="first">first</a></li><li><a href="#method.first_chunk" title="first_chunk">first_chunk</a></li><li><a href="#method.first_chunk_mut" title="first_chunk_mut">first_chunk_mut</a></li><li><a href="#method.first_mut" title="first_mut">first_mut</a></li><li><a href="#method.get" title="get">get</a></li><li><a href="#method.get_many_mut" title="get_many_mut">get_many_mut</a></li><li><a href="#method.get_many_unchecked_mut" title="get_many_unchecked_mut">get_many_unchecked_mut</a></li><li><a href="#method.get_mut" title="get_mut">get_mut</a></li><li><a href="#method.get_unchecked" title="get_unchecked">get_unchecked</a></li><li><a href="#method.get_unchecked_mut" title="get_unchecked_mut">get_unchecked_mut</a></li><li><a href="#method.is_ascii" title="is_ascii">is_ascii</a></li><li><a href="#method.is_empty" title="is_empty">is_empty</a></li><li><a href="#method.is_sorted" title="is_sorted">is_sorted</a></li><li><a href="#method.is_sorted_by" title="is_sorted_by">is_sorted_by</a></li><li><a href="#method.is_sorted_by_key" title="is_sorted_by_key">is_sorted_by_key</a></li><li><a href="#method.iter" title="iter">iter</a></li><li><a href="#method.iter_mut" title="iter_mut">iter_mut</a></li><li><a href="#method.join" title="join">join</a></li><li><a href="#method.last" title="last">last</a></li><li><a href="#method.last_chunk" title="last_chunk">last_chunk</a></li><li><a href="#method.last_chunk_mut" title="last_chunk_mut">last_chunk_mut</a></li><li><a href="#method.last_mut" title="last_mut">last_mut</a></li><li><a href="#method.len" title="len">len</a></li><li><a href="#method.make_ascii_lowercase" title="make_ascii_lowercase">make_ascii_lowercase</a></li><li><a href="#method.make_ascii_uppercase" title="make_ascii_uppercase">make_ascii_uppercase</a></li><li><a href="#method.partition_dedup" title="partition_dedup">partition_dedup</a></li><li><a href="#method.partition_dedup_by" title="partition_dedup_by">partition_dedup_by</a></li><li><a href="#method.partition_dedup_by_key" title="partition_dedup_by_key">partition_dedup_by_key</a></li><li><a href="#method.partition_point" title="partition_point">partition_point</a></li><li><a href="#method.rchunks" title="rchunks">rchunks</a></li><li><a href="#method.rchunks_exact" title="rchunks_exact">rchunks_exact</a></li><li><a href="#method.rchunks_exact_mut" title="rchunks_exact_mut">rchunks_exact_mut</a></li><li><a href="#method.rchunks_mut" title="rchunks_mut">rchunks_mut</a></li><li><a href="#method.repeat" title="repeat">repeat</a></li><li><a href="#method.reverse" title="reverse">reverse</a></li><li><a href="#method.rotate_left" title="rotate_left">rotate_left</a></li><li><a href="#method.rotate_right" title="rotate_right">rotate_right</a></li><li><a href="#method.rsplit" title="rsplit">rsplit</a></li><li><a href="#method.rsplit_mut" title="rsplit_mut">rsplit_mut</a></li><li><a href="#method.rsplit_once" title="rsplit_once">rsplit_once</a></li><li><a href="#method.rsplitn" title="rsplitn">rsplitn</a></li><li><a href="#method.rsplitn_mut" title="rsplitn_mut">rsplitn_mut</a></li><li><a href="#method.select_nth_unstable" title="select_nth_unstable">select_nth_unstable</a></li><li><a href="#method.select_nth_unstable_by" title="select_nth_unstable_by">select_nth_unstable_by</a></li><li><a href="#method.select_nth_unstable_by_key" title="select_nth_unstable_by_key">select_nth_unstable_by_key</a></li><li><a href="#method.sort" title="sort">sort</a></li><li><a href="#method.sort_by" title="sort_by">sort_by</a></li><li><a href="#method.sort_by_cached_key" title="sort_by_cached_key">sort_by_cached_key</a></li><li><a href="#method.sort_by_key" title="sort_by_key">sort_by_key</a></li><li><a href="#method.sort_floats" title="sort_floats">sort_floats</a></li><li><a href="#method.sort_floats-1" title="sort_floats">sort_floats</a></li><li><a href="#method.sort_unstable" title="sort_unstable">sort_unstable</a></li><li><a href="#method.sort_unstable_by" title="sort_unstable_by">sort_unstable_by</a></li><li><a href="#method.sort_unstable_by_key" title="sort_unstable_by_key">sort_unstable_by_key</a></li><li><a href="#method.split" title="split">split</a></li><li><a href="#method.split_at" title="split_at">split_at</a></li><li><a href="#method.split_at_checked" title="split_at_checked">split_at_checked</a></li><li><a href="#method.split_at_mut" title="split_at_mut">split_at_mut</a></li><li><a href="#method.split_at_mut_checked" title="split_at_mut_checked">split_at_mut_checked</a></li><li><a href="#method.split_at_mut_unchecked" title="split_at_mut_unchecked">split_at_mut_unchecked</a></li><li><a href="#method.split_at_unchecked" title="split_at_unchecked">split_at_unchecked</a></li><li><a href="#method.split_first" title="split_first">split_first</a></li><li><a href="#method.split_first_chunk" title="split_first_chunk">split_first_chunk</a></li><li><a href="#method.split_first_chunk_mut" title="split_first_chunk_mut">split_first_chunk_mut</a></li><li><a href="#method.split_first_mut" title="split_first_mut">split_first_mut</a></li><li><a href="#method.split_inclusive" title="split_inclusive">split_inclusive</a></li><li><a href="#method.split_inclusive_mut" title="split_inclusive_mut">split_inclusive_mut</a></li><li><a href="#method.split_last" title="split_last">split_last</a></li><li><a href="#method.split_last_chunk" title="split_last_chunk">split_last_chunk</a></li><li><a href="#method.split_last_chunk_mut" title="split_last_chunk_mut">split_last_chunk_mut</a></li><li><a href="#method.split_last_mut" title="split_last_mut">split_last_mut</a></li><li><a href="#method.split_mut" title="split_mut">split_mut</a></li><li><a href="#method.split_once" title="split_once">split_once</a></li><li><a href="#method.splitn" title="splitn">splitn</a></li><li><a href="#method.splitn_mut" title="splitn_mut">splitn_mut</a></li><li><a href="#method.starts_with" title="starts_with">starts_with</a></li><li><a href="#method.strip_prefix" title="strip_prefix">strip_prefix</a></li><li><a href="#method.strip_suffix" title="strip_suffix">strip_suffix</a></li><li><a href="#method.subslice_range" title="subslice_range">subslice_range</a></li><li><a href="#method.swap" title="swap">swap</a></li><li><a href="#method.swap_unchecked" title="swap_unchecked">swap_unchecked</a></li><li><a href="#method.swap_with_slice" title="swap_with_slice">swap_with_slice</a></li><li><a href="#method.take" title="take">take</a></li><li><a href="#method.take_first" title="take_first">take_first</a></li><li><a href="#method.take_first_mut" title="take_first_mut">take_first_mut</a></li><li><a href="#method.take_last" title="take_last">take_last</a></li><li><a href="#method.take_last_mut" title="take_last_mut">take_last_mut</a></li><li><a href="#method.take_mut" title="take_mut">take_mut</a></li><li><a href="#method.to_ascii_lowercase" title="to_ascii_lowercase">to_ascii_lowercase</a></li><li><a href="#method.to_ascii_uppercase" title="to_ascii_uppercase">to_ascii_uppercase</a></li><li><a href="#method.to_vec" title="to_vec">to_vec</a></li><li><a href="#method.to_vec_in" title="to_vec_in">to_vec_in</a></li><li><a href="#method.trim_ascii" title="trim_ascii">trim_ascii</a></li><li><a href="#method.trim_ascii_end" title="trim_ascii_end">trim_ascii_end</a></li><li><a href="#method.trim_ascii_start" title="trim_ascii_start">trim_ascii_start</a></li><li><a href="#method.utf8_chunks" title="utf8_chunks">utf8_chunks</a></li><li><a href="#method.windows" title="windows">windows</a></li></ul><h3><a href="#trait-implementations">Trait Implementations</a></h3><ul class="block trait-implementation"><li><a href="#impl-AsMut%3C%5Bu8%5D%3E-for-Bytes" title="AsMut<[u8]>">AsMut<[u8]></a></li><li><a href="#impl-AsRef%3C%5Bu8%5D%3E-for-Bytes" title="AsRef<[u8]>">AsRef<[u8]></a></li><li><a href="#impl-Borrow%3CBytes%3E-for-ByteArray%3CN%3E" title="Borrow<Bytes>">Borrow<Bytes></a></li><li><a href="#impl-Borrow%3CBytes%3E-for-ByteBuf" title="Borrow<Bytes>">Borrow<Bytes></a></li><li><a href="#impl-BorrowMut%3CBytes%3E-for-ByteArray%3CN%3E" title="BorrowMut<Bytes>">BorrowMut<Bytes></a></li><li><a href="#impl-BorrowMut%3CBytes%3E-for-ByteBuf" title="BorrowMut<Bytes>">BorrowMut<Bytes></a></li><li><a href="#impl-Debug-for-Bytes" title="Debug">Debug</a></li><li><a href="#impl-Default-for-%26Bytes" title="Default">Default</a></li><li><a href="#impl-Default-for-Box%3CBytes%3E" title="Default">Default</a></li><li><a href="#impl-Deref-for-Bytes" title="Deref">Deref</a></li><li><a href="#impl-DerefMut-for-Bytes" title="DerefMut">DerefMut</a></li><li><a href="#impl-Deserialize%3C'de%3E-for-%26Bytes" title="Deserialize<'de>">Deserialize<'de></a></li><li><a href="#impl-Deserialize%3C'de%3E-for-%26Bytes-1" title="Deserialize<'de>">Deserialize<'de></a></li><li><a href="#impl-Deserialize%3C'de%3E-for-Box%3CBytes%3E" title="Deserialize<'de>">Deserialize<'de></a></li><li><a href="#impl-Eq-for-Bytes" title="Eq">Eq</a></li><li><a href="#impl-From%3C%26%5Bu8%5D%3E-for-%26Bytes" title="From<&'a [u8]>">From<&'a [u8]></a></li><li><a href="#impl-From%3CBox%3C%5Bu8%5D%3E%3E-for-Box%3CBytes%3E" title="From<Box<[u8]>>">From<Box<[u8]>></a></li><li><a href="#impl-Hash-for-Bytes" title="Hash">Hash</a></li><li><a href="#impl-IntoIterator-for-%26Bytes" title="IntoIterator">IntoIterator</a></li><li><a href="#impl-IntoIterator-for-%26mut+Bytes" title="IntoIterator">IntoIterator</a></li><li><a href="#impl-Ord-for-Bytes" title="Ord">Ord</a></li><li><a href="#impl-PartialEq%3CRhs%3E-for-Bytes" title="PartialEq<Rhs>">PartialEq<Rhs></a></li><li><a href="#impl-PartialOrd%3CRhs%3E-for-Bytes" title="PartialOrd<Rhs>">PartialOrd<Rhs></a></li><li><a href="#impl-Serialize-for-Bytes" title="Serialize">Serialize</a></li><li><a href="#impl-Serialize-for-Bytes-1" title="Serialize">Serialize</a></li><li><a href="#impl-ToOwned-for-Bytes" title="ToOwned">ToOwned</a></li></ul><h3><a href="#synthetic-implementations">Auto Trait Implementations</a></h3><ul class="block synthetic-implementation"><li><a href="#impl-Sized-for-Bytes" title="!Sized">!Sized</a></li><li><a href="#impl-Freeze-for-Bytes" title="Freeze">Freeze</a></li><li><a href="#impl-RefUnwindSafe-for-Bytes" title="RefUnwindSafe">RefUnwindSafe</a></li><li><a href="#impl-Send-for-Bytes" title="Send">Send</a></li><li><a href="#impl-Sync-for-Bytes" title="Sync">Sync</a></li><li><a href="#impl-Unpin-for-Bytes" title="Unpin">Unpin</a></li><li><a href="#impl-UnwindSafe-for-Bytes" title="UnwindSafe">UnwindSafe</a></li></ul><h3><a href="#blanket-implementations">Blanket Implementations</a></h3><ul class="block blanket-implementation"><li><a href="#impl-Any-for-T" title="Any">Any</a></li><li><a href="#impl-Borrow%3CT%3E-for-T" title="Borrow<T>">Borrow<T></a></li><li><a href="#impl-BorrowMut%3CT%3E-for-T" title="BorrowMut<T>">BorrowMut<T></a></li><li><a href="#impl-Receiver-for-P" title="Receiver">Receiver</a></li></ul></section><div id="rustdoc-modnav"><h2 class="in-crate"><a href="index.html">In crate serde_<wbr>bytes</a></h2></div></div></nav><div class="sidebar-resizer"></div><main><div class="width-limiter"><rustdoc-search></rustdoc-search><section id="main-content" class="content"><div class="main-heading"><span class="rustdoc-breadcrumbs"><a href="index.html">serde_bytes</a></span><h1>Struct <span class="struct">Bytes</span><button id="copy-path" title="Copy item path to clipboard">Copy item path</button></h1><rustdoc-toolbar></rustdoc-toolbar><span class="sub-heading"><a class="src" href="../src/serde_bytes/bytes.rs.html#47-49">Source</a> </span></div><pre class="rust item-decl"><code><div class="code-attribute">#[repr(transparent)]</div>pub struct Bytes {
bytes: [<a class="primitive" href="https://doc.rust-lang.org/1.85.0/std/primitive.u8.html">u8</a>],
}</code></pre><details class="toggle top-doc" open><summary class="hideme"><span>Expand description</span></summary><div class="docblock"><p>Wrapper around <code>[u8]</code> to serialize and deserialize efficiently.</p>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>std::collections::HashMap;
<span class="kw">use </span>std::io;
<span class="kw">use </span>serde_bytes::Bytes;
<span class="kw">fn </span>print_encoded_cache() -> <span class="prelude-ty">Result</span><(), bincode::error::EncodeError> {
<span class="kw">let </span><span class="kw-2">mut </span>cache = HashMap::new();
cache.insert(<span class="number">3</span>, Bytes::new(<span class="string">b"three"</span>));
cache.insert(<span class="number">2</span>, Bytes::new(<span class="string">b"two"</span>));
cache.insert(<span class="number">1</span>, Bytes::new(<span class="string">b"one"</span>));
bincode::serde::encode_into_std_write(
<span class="kw-2">&</span>cache,
<span class="kw-2">&mut </span>io::stdout(),
bincode::config::standard(),
)<span class="question-mark">?</span>;
<span class="prelude-val">Ok</span>(())
}</code></pre></div>
</div></details><h2 id="fields" class="fields section-header">Fields<a href="#fields" class="anchor">§</a></h2><span id="structfield.bytes" class="structfield section-header"><a href="#structfield.bytes" class="anchor field">§</a><code>bytes: [<a class="primitive" href="https://doc.rust-lang.org/1.85.0/std/primitive.u8.html">u8</a>]</code></span><h2 id="implementations" class="section-header">Implementations<a href="#implementations" class="anchor">§</a></h2><div id="implementations-list"><details class="toggle implementors-toggle" open><summary><section id="impl-Bytes" class="impl"><a class="src rightside" href="../src/serde_bytes/bytes.rs.html#51-56">Source</a><a href="#impl-Bytes" class="anchor">§</a><h3 class="code-header">impl <a class="struct" href="struct.Bytes.html" title="struct serde_bytes::Bytes">Bytes</a></h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.new" class="method"><a class="src rightside" href="../src/serde_bytes/bytes.rs.html#53-55">Source</a><h4 class="code-header">pub fn <a href="#method.new" class="fn">new</a>(bytes: &[<a class="primitive" href="https://doc.rust-lang.org/1.85.0/std/primitive.u8.html">u8</a>]) -> &Self</h4></section></summary><div class="docblock"><p>Wrap an existing <code>&[u8]</code>.</p>
</div></details></div></details></div><details class="toggle big-toggle" open><summary><h2 id="deref-methods-%5Bu8%5D" class="section-header"><span>Methods from <a class="trait" href="https://doc.rust-lang.org/1.85.0/core/ops/deref/trait.Deref.html" title="trait core::ops::deref::Deref">Deref</a><Target = [<a class="primitive" href="https://doc.rust-lang.org/1.85.0/std/primitive.u8.html">u8</a>]></span><a href="#deref-methods-%5Bu8%5D" class="anchor">§</a></h2></summary><div id="deref-methods-%5Bu8%5D-1" class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.as_str" class="method"><a class="src rightside" href="https://doc.rust-lang.org/1.85.0/src/core/ascii/ascii_char.rs.html#564">Source</a><h4 class="code-header">pub fn <a href="#method.as_str" class="fn">as_str</a>(&self) -> &<a class="primitive" href="https://doc.rust-lang.org/1.85.0/std/primitive.str.html">str</a></h4></section><span class="item-info"><div class="stab unstable"><span class="emoji">🔬</span><span>This is a nightly-only experimental API. (<code>ascii_char</code>)</span></div></span></summary><div class="docblock"><p>Views this slice of ASCII characters as a UTF-8 <code>str</code>.</p>
</div></details><details class="toggle method-toggle" open><summary><section id="method.as_bytes" class="method"><a class="src rightside" href="https://doc.rust-lang.org/1.85.0/src/core/ascii/ascii_char.rs.html#575">Source</a><h4 class="code-header">pub fn <a href="#method.as_bytes" class="fn">as_bytes</a>(&self) -> &[<a class="primitive" href="https://doc.rust-lang.org/1.85.0/std/primitive.u8.html">u8</a>] <a href="#" class="tooltip" data-notable-ty="&[u8]">ⓘ</a></h4></section><span class="item-info"><div class="stab unstable"><span class="emoji">🔬</span><span>This is a nightly-only experimental API. (<code>ascii_char</code>)</span></div></span></summary><div class="docblock"><p>Views this slice of ASCII characters as a slice of <code>u8</code> bytes.</p>
</div></details><details class="toggle method-toggle" open><summary><section id="method.is_ascii" class="method"><span class="rightside"><span class="since" title="Stable since Rust version 1.23.0">1.23.0</span> · <a class="src" href="https://doc.rust-lang.org/1.85.0/src/core/slice/ascii.rs.html#17">Source</a></span><h4 class="code-header">pub fn <a href="#method.is_ascii" class="fn">is_ascii</a>(&self) -> <a class="primitive" href="https://doc.rust-lang.org/1.85.0/std/primitive.bool.html">bool</a></h4></section></summary><div class="docblock"><p>Checks if all bytes in this slice are within the ASCII range.</p>
</div></details><details class="toggle method-toggle" open><summary><section id="method.as_ascii" class="method"><a class="src rightside" href="https://doc.rust-lang.org/1.85.0/src/core/slice/ascii.rs.html#26">Source</a><h4 class="code-header">pub fn <a href="#method.as_ascii" class="fn">as_ascii</a>(&self) -> <a class="enum" href="https://doc.rust-lang.org/1.85.0/core/option/enum.Option.html" title="enum core::option::Option">Option</a><&[<a class="enum" href="https://doc.rust-lang.org/1.85.0/core/ascii/ascii_char/enum.AsciiChar.html" title="enum core::ascii::ascii_char::AsciiChar">AsciiChar</a>]></h4></section><span class="item-info"><div class="stab unstable"><span class="emoji">🔬</span><span>This is a nightly-only experimental API. (<code>ascii_char</code>)</span></div></span></summary><div class="docblock"><p>If this slice <a href="https://doc.rust-lang.org/1.85.0/std/primitive.slice.html#method.is_ascii" title="method slice::is_ascii"><code>is_ascii</code></a>, returns it as a slice of
<a href="https://doc.rust-lang.org/1.85.0/core/ascii/ascii_char/enum.AsciiChar.html" title="enum core::ascii::ascii_char::AsciiChar">ASCII characters</a>, otherwise returns <code>None</code>.</p>
</div></details><details class="toggle method-toggle" open><summary><section id="method.as_ascii_unchecked" class="method"><a class="src rightside" href="https://doc.rust-lang.org/1.85.0/src/core/slice/ascii.rs.html#44">Source</a><h4 class="code-header">pub unsafe fn <a href="#method.as_ascii_unchecked" class="fn">as_ascii_unchecked</a>(&self) -> &[<a class="enum" href="https://doc.rust-lang.org/1.85.0/core/ascii/ascii_char/enum.AsciiChar.html" title="enum core::ascii::ascii_char::AsciiChar">AsciiChar</a>]</h4></section><span class="item-info"><div class="stab unstable"><span class="emoji">🔬</span><span>This is a nightly-only experimental API. (<code>ascii_char</code>)</span></div></span></summary><div class="docblock"><p>Converts this slice of bytes into a slice of ASCII characters,
without checking whether they’re valid.</p>
<h5 id="safety"><a class="doc-anchor" href="#safety">§</a>Safety</h5>
<p>Every byte in the slice must be in <code>0..=127</code>, or else this is UB.</p>
</div></details><details class="toggle method-toggle" open><summary><section id="method.eq_ignore_ascii_case" class="method"><span class="rightside"><span class="since" title="Stable since Rust version 1.23.0">1.23.0</span> · <a class="src" href="https://doc.rust-lang.org/1.85.0/src/core/slice/ascii.rs.html#59">Source</a></span><h4 class="code-header">pub fn <a href="#method.eq_ignore_ascii_case" class="fn">eq_ignore_ascii_case</a>(&self, other: &[<a class="primitive" href="https://doc.rust-lang.org/1.85.0/std/primitive.u8.html">u8</a>]) -> <a class="primitive" href="https://doc.rust-lang.org/1.85.0/std/primitive.bool.html">bool</a></h4></section></summary><div class="docblock"><p>Checks that two slices are an ASCII case-insensitive match.</p>
<p>Same as <code>to_ascii_lowercase(a) == to_ascii_lowercase(b)</code>,
but without allocating and copying temporaries.</p>
</div></details><details class="toggle method-toggle" open><summary><section id="method.make_ascii_uppercase" class="method"><span class="rightside"><span class="since" title="Stable since Rust version 1.23.0">1.23.0</span> · <a class="src" href="https://doc.rust-lang.org/1.85.0/src/core/slice/ascii.rs.html#94">Source</a></span><h4 class="code-header">pub fn <a href="#method.make_ascii_uppercase" class="fn">make_ascii_uppercase</a>(&mut self)</h4></section></summary><div class="docblock"><p>Converts this slice to its ASCII upper case equivalent in-place.</p>
<p>ASCII letters ‘a’ to ‘z’ are mapped to ‘A’ to ‘Z’,
but non-ASCII letters are unchanged.</p>
<p>To return a new uppercased value without modifying the existing one, use
<a href="#method.to_ascii_uppercase"><code>to_ascii_uppercase</code></a>.</p>
</div></details><details class="toggle method-toggle" open><summary><section id="method.make_ascii_lowercase" class="method"><span class="rightside"><span class="since" title="Stable since Rust version 1.23.0">1.23.0</span> · <a class="src" href="https://doc.rust-lang.org/1.85.0/src/core/slice/ascii.rs.html#116">Source</a></span><h4 class="code-header">pub fn <a href="#method.make_ascii_lowercase" class="fn">make_ascii_lowercase</a>(&mut self)</h4></section></summary><div class="docblock"><p>Converts this slice to its ASCII lower case equivalent in-place.</p>
<p>ASCII letters ‘A’ to ‘Z’ are mapped to ‘a’ to ‘z’,
but non-ASCII letters are unchanged.</p>
<p>To return a new lowercased value without modifying the existing one, use
<a href="#method.to_ascii_lowercase"><code>to_ascii_lowercase</code></a>.</p>
</div></details><details class="toggle method-toggle" open><summary><section id="method.escape_ascii" class="method"><span class="rightside"><span class="since" title="Stable since Rust version 1.60.0">1.60.0</span> · <a class="src" href="https://doc.rust-lang.org/1.85.0/src/core/slice/ascii.rs.html#140">Source</a></span><h4 class="code-header">pub fn <a href="#method.escape_ascii" class="fn">escape_ascii</a>(&self) -> <a class="struct" href="https://doc.rust-lang.org/1.85.0/core/slice/ascii/struct.EscapeAscii.html" title="struct core::slice::ascii::EscapeAscii">EscapeAscii</a><'_></h4></section></summary><div class="docblock"><p>Returns an iterator that produces an escaped version of this slice,
treating it as an ASCII string.</p>
<h5 id="examples"><a class="doc-anchor" href="#examples">§</a>Examples</h5>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code>
<span class="kw">let </span>s = <span class="string">b"0\t\r\n'\"\\\x9d"</span>;
<span class="kw">let </span>escaped = s.escape_ascii().to_string();
<span class="macro">assert_eq!</span>(escaped, <span class="string">"0\\t\\r\\n\\'\\\"\\\\\\x9d"</span>);</code></pre></div>
</div></details><details class="toggle method-toggle" open><summary><section id="method.trim_ascii_start" class="method"><span class="rightside"><span class="since" title="Stable since Rust version 1.80.0">1.80.0</span> · <a class="src" href="https://doc.rust-lang.org/1.85.0/src/core/slice/ascii.rs.html#159">Source</a></span><h4 class="code-header">pub fn <a href="#method.trim_ascii_start" class="fn">trim_ascii_start</a>(&self) -> &[<a class="primitive" href="https://doc.rust-lang.org/1.85.0/std/primitive.u8.html">u8</a>] <a href="#" class="tooltip" data-notable-ty="&[u8]">ⓘ</a></h4></section></summary><div class="docblock"><p>Returns a byte slice with leading ASCII whitespace bytes removed.</p>
<p>‘Whitespace’ refers to the definition used by
<a href="https://doc.rust-lang.org/1.85.0/std/primitive.u8.html#method.is_ascii_whitespace" title="method u8::is_ascii_whitespace"><code>u8::is_ascii_whitespace</code></a>.</p>
<h5 id="examples-1"><a class="doc-anchor" href="#examples-1">§</a>Examples</h5>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="macro">assert_eq!</span>(<span class="string">b" \t hello world\n"</span>.trim_ascii_start(), <span class="string">b"hello world\n"</span>);
<span class="macro">assert_eq!</span>(<span class="string">b" "</span>.trim_ascii_start(), <span class="string">b""</span>);
<span class="macro">assert_eq!</span>(<span class="string">b""</span>.trim_ascii_start(), <span class="string">b""</span>);</code></pre></div>
</div></details><details class="toggle method-toggle" open><summary><section id="method.trim_ascii_end" class="method"><span class="rightside"><span class="since" title="Stable since Rust version 1.80.0">1.80.0</span> · <a class="src" href="https://doc.rust-lang.org/1.85.0/src/core/slice/ascii.rs.html#188">Source</a></span><h4 class="code-header">pub fn <a href="#method.trim_ascii_end" class="fn">trim_ascii_end</a>(&self) -> &[<a class="primitive" href="https://doc.rust-lang.org/1.85.0/std/primitive.u8.html">u8</a>] <a href="#" class="tooltip" data-notable-ty="&[u8]">ⓘ</a></h4></section></summary><div class="docblock"><p>Returns a byte slice with trailing ASCII whitespace bytes removed.</p>
<p>‘Whitespace’ refers to the definition used by
<a href="https://doc.rust-lang.org/1.85.0/std/primitive.u8.html#method.is_ascii_whitespace" title="method u8::is_ascii_whitespace"><code>u8::is_ascii_whitespace</code></a>.</p>
<h5 id="examples-2"><a class="doc-anchor" href="#examples-2">§</a>Examples</h5>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="macro">assert_eq!</span>(<span class="string">b"\r hello world\n "</span>.trim_ascii_end(), <span class="string">b"\r hello world"</span>);
<span class="macro">assert_eq!</span>(<span class="string">b" "</span>.trim_ascii_end(), <span class="string">b""</span>);
<span class="macro">assert_eq!</span>(<span class="string">b""</span>.trim_ascii_end(), <span class="string">b""</span>);</code></pre></div>
</div></details><details class="toggle method-toggle" open><summary><section id="method.trim_ascii" class="method"><span class="rightside"><span class="since" title="Stable since Rust version 1.80.0">1.80.0</span> · <a class="src" href="https://doc.rust-lang.org/1.85.0/src/core/slice/ascii.rs.html#218">Source</a></span><h4 class="code-header">pub fn <a href="#method.trim_ascii" class="fn">trim_ascii</a>(&self) -> &[<a class="primitive" href="https://doc.rust-lang.org/1.85.0/std/primitive.u8.html">u8</a>] <a href="#" class="tooltip" data-notable-ty="&[u8]">ⓘ</a></h4></section></summary><div class="docblock"><p>Returns a byte slice with leading and trailing ASCII whitespace bytes
removed.</p>
<p>‘Whitespace’ refers to the definition used by
<a href="https://doc.rust-lang.org/1.85.0/std/primitive.u8.html#method.is_ascii_whitespace" title="method u8::is_ascii_whitespace"><code>u8::is_ascii_whitespace</code></a>.</p>
<h5 id="examples-3"><a class="doc-anchor" href="#examples-3">§</a>Examples</h5>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="macro">assert_eq!</span>(<span class="string">b"\r hello world\n "</span>.trim_ascii(), <span class="string">b"hello world"</span>);
<span class="macro">assert_eq!</span>(<span class="string">b" "</span>.trim_ascii(), <span class="string">b""</span>);
<span class="macro">assert_eq!</span>(<span class="string">b""</span>.trim_ascii(), <span class="string">b""</span>);</code></pre></div>
</div></details><details class="toggle method-toggle" open><summary><section id="method.len" class="method"><span class="rightside"><span class="since" title="Stable since Rust version 1.0.0">1.0.0</span> · <a class="src" href="https://doc.rust-lang.org/1.85.0/src/core/slice/mod.rs.html#117">Source</a></span><h4 class="code-header">pub fn <a href="#method.len" class="fn">len</a>(&self) -> <a class="primitive" href="https://doc.rust-lang.org/1.85.0/std/primitive.usize.html">usize</a></h4></section></summary><div class="docblock"><p>Returns the number of elements in the slice.</p>
<h5 id="examples-4"><a class="doc-anchor" href="#examples-4">§</a>Examples</h5>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>a = [<span class="number">1</span>, <span class="number">2</span>, <span class="number">3</span>];
<span class="macro">assert_eq!</span>(a.len(), <span class="number">3</span>);</code></pre></div>
</div></details><details class="toggle method-toggle" open><summary><section id="method.is_empty" class="method"><span class="rightside"><span class="since" title="Stable since Rust version 1.0.0">1.0.0</span> · <a class="src" href="https://doc.rust-lang.org/1.85.0/src/core/slice/mod.rs.html#136">Source</a></span><h4 class="code-header">pub fn <a href="#method.is_empty" class="fn">is_empty</a>(&self) -> <a class="primitive" href="https://doc.rust-lang.org/1.85.0/std/primitive.bool.html">bool</a></h4></section></summary><div class="docblock"><p>Returns <code>true</code> if the slice has a length of 0.</p>
<h5 id="examples-5"><a class="doc-anchor" href="#examples-5">§</a>Examples</h5>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>a = [<span class="number">1</span>, <span class="number">2</span>, <span class="number">3</span>];
<span class="macro">assert!</span>(!a.is_empty());
<span class="kw">let </span>b: <span class="kw-2">&</span>[i32] = <span class="kw-2">&</span>[];
<span class="macro">assert!</span>(b.is_empty());</code></pre></div>
</div></details><details class="toggle method-toggle" open><summary><section id="method.first" class="method"><span class="rightside"><span class="since" title="Stable since Rust version 1.0.0">1.0.0</span> · <a class="src" href="https://doc.rust-lang.org/1.85.0/src/core/slice/mod.rs.html#155">Source</a></span><h4 class="code-header">pub fn <a href="#method.first" class="fn">first</a>(&self) -> <a class="enum" href="https://doc.rust-lang.org/1.85.0/core/option/enum.Option.html" title="enum core::option::Option">Option</a><<a class="primitive" href="https://doc.rust-lang.org/1.85.0/std/primitive.reference.html">&T</a>></h4></section></summary><div class="docblock"><p>Returns the first element of the slice, or <code>None</code> if it is empty.</p>
<h5 id="examples-6"><a class="doc-anchor" href="#examples-6">§</a>Examples</h5>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>v = [<span class="number">10</span>, <span class="number">40</span>, <span class="number">30</span>];
<span class="macro">assert_eq!</span>(<span class="prelude-val">Some</span>(<span class="kw-2">&</span><span class="number">10</span>), v.first());
<span class="kw">let </span>w: <span class="kw-2">&</span>[i32] = <span class="kw-2">&</span>[];
<span class="macro">assert_eq!</span>(<span class="prelude-val">None</span>, w.first());</code></pre></div>
</div></details><details class="toggle method-toggle" open><summary><section id="method.first_mut" class="method"><span class="rightside"><span class="since" title="Stable since Rust version 1.0.0">1.0.0</span> · <a class="src" href="https://doc.rust-lang.org/1.85.0/src/core/slice/mod.rs.html#178">Source</a></span><h4 class="code-header">pub fn <a href="#method.first_mut" class="fn">first_mut</a>(&mut self) -> <a class="enum" href="https://doc.rust-lang.org/1.85.0/core/option/enum.Option.html" title="enum core::option::Option">Option</a><<a class="primitive" href="https://doc.rust-lang.org/1.85.0/std/primitive.reference.html">&mut T</a>></h4></section></summary><div class="docblock"><p>Returns a mutable reference to the first element of the slice, or <code>None</code> if it is empty.</p>
<h5 id="examples-7"><a class="doc-anchor" href="#examples-7">§</a>Examples</h5>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>x = <span class="kw-2">&mut </span>[<span class="number">0</span>, <span class="number">1</span>, <span class="number">2</span>];
<span class="kw">if let </span><span class="prelude-val">Some</span>(first) = x.first_mut() {
<span class="kw-2">*</span>first = <span class="number">5</span>;
}
<span class="macro">assert_eq!</span>(x, <span class="kw-2">&</span>[<span class="number">5</span>, <span class="number">1</span>, <span class="number">2</span>]);
<span class="kw">let </span>y: <span class="kw-2">&mut </span>[i32] = <span class="kw-2">&mut </span>[];
<span class="macro">assert_eq!</span>(<span class="prelude-val">None</span>, y.first_mut());</code></pre></div>
</div></details><details class="toggle method-toggle" open><summary><section id="method.split_first" class="method"><span class="rightside"><span class="since" title="Stable since Rust version 1.5.0">1.5.0</span> · <a class="src" href="https://doc.rust-lang.org/1.85.0/src/core/slice/mod.rs.html#198">Source</a></span><h4 class="code-header">pub fn <a href="#method.split_first" class="fn">split_first</a>(&self) -> <a class="enum" href="https://doc.rust-lang.org/1.85.0/core/option/enum.Option.html" title="enum core::option::Option">Option</a><(<a class="primitive" href="https://doc.rust-lang.org/1.85.0/std/primitive.reference.html">&T</a>, &<a class="primitive" href="https://doc.rust-lang.org/1.85.0/std/primitive.slice.html">[T]</a>)></h4></section></summary><div class="docblock"><p>Returns the first and all the rest of the elements of the slice, or <code>None</code> if it is empty.</p>
<h5 id="examples-8"><a class="doc-anchor" href="#examples-8">§</a>Examples</h5>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>x = <span class="kw-2">&</span>[<span class="number">0</span>, <span class="number">1</span>, <span class="number">2</span>];
<span class="kw">if let </span><span class="prelude-val">Some</span>((first, elements)) = x.split_first() {
<span class="macro">assert_eq!</span>(first, <span class="kw-2">&</span><span class="number">0</span>);
<span class="macro">assert_eq!</span>(elements, <span class="kw-2">&</span>[<span class="number">1</span>, <span class="number">2</span>]);
}</code></pre></div>
</div></details><details class="toggle method-toggle" open><summary><section id="method.split_first_mut" class="method"><span class="rightside"><span class="since" title="Stable since Rust version 1.5.0">1.5.0</span> · <a class="src" href="https://doc.rust-lang.org/1.85.0/src/core/slice/mod.rs.html#220">Source</a></span><h4 class="code-header">pub fn <a href="#method.split_first_mut" class="fn">split_first_mut</a>(&mut self) -> <a class="enum" href="https://doc.rust-lang.org/1.85.0/core/option/enum.Option.html" title="enum core::option::Option">Option</a><(<a class="primitive" href="https://doc.rust-lang.org/1.85.0/std/primitive.reference.html">&mut T</a>, &mut <a class="primitive" href="https://doc.rust-lang.org/1.85.0/std/primitive.slice.html">[T]</a>)></h4></section></summary><div class="docblock"><p>Returns the first and all the rest of the elements of the slice, or <code>None</code> if it is empty.</p>
<h5 id="examples-9"><a class="doc-anchor" href="#examples-9">§</a>Examples</h5>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>x = <span class="kw-2">&mut </span>[<span class="number">0</span>, <span class="number">1</span>, <span class="number">2</span>];
<span class="kw">if let </span><span class="prelude-val">Some</span>((first, elements)) = x.split_first_mut() {
<span class="kw-2">*</span>first = <span class="number">3</span>;
elements[<span class="number">0</span>] = <span class="number">4</span>;
elements[<span class="number">1</span>] = <span class="number">5</span>;
}
<span class="macro">assert_eq!</span>(x, <span class="kw-2">&</span>[<span class="number">3</span>, <span class="number">4</span>, <span class="number">5</span>]);</code></pre></div>
</div></details><details class="toggle method-toggle" open><summary><section id="method.split_last" class="method"><span class="rightside"><span class="since" title="Stable since Rust version 1.5.0">1.5.0</span> · <a class="src" href="https://doc.rust-lang.org/1.85.0/src/core/slice/mod.rs.html#240">Source</a></span><h4 class="code-header">pub fn <a href="#method.split_last" class="fn">split_last</a>(&self) -> <a class="enum" href="https://doc.rust-lang.org/1.85.0/core/option/enum.Option.html" title="enum core::option::Option">Option</a><(<a class="primitive" href="https://doc.rust-lang.org/1.85.0/std/primitive.reference.html">&T</a>, &<a class="primitive" href="https://doc.rust-lang.org/1.85.0/std/primitive.slice.html">[T]</a>)></h4></section></summary><div class="docblock"><p>Returns the last and all the rest of the elements of the slice, or <code>None</code> if it is empty.</p>
<h5 id="examples-10"><a class="doc-anchor" href="#examples-10">§</a>Examples</h5>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>x = <span class="kw-2">&</span>[<span class="number">0</span>, <span class="number">1</span>, <span class="number">2</span>];
<span class="kw">if let </span><span class="prelude-val">Some</span>((last, elements)) = x.split_last() {
<span class="macro">assert_eq!</span>(last, <span class="kw-2">&</span><span class="number">2</span>);
<span class="macro">assert_eq!</span>(elements, <span class="kw-2">&</span>[<span class="number">0</span>, <span class="number">1</span>]);
}</code></pre></div>
</div></details><details class="toggle method-toggle" open><summary><section id="method.split_last_mut" class="method"><span class="rightside"><span class="since" title="Stable since Rust version 1.5.0">1.5.0</span> · <a class="src" href="https://doc.rust-lang.org/1.85.0/src/core/slice/mod.rs.html#262">Source</a></span><h4 class="code-header">pub fn <a href="#method.split_last_mut" class="fn">split_last_mut</a>(&mut self) -> <a class="enum" href="https://doc.rust-lang.org/1.85.0/core/option/enum.Option.html" title="enum core::option::Option">Option</a><(<a class="primitive" href="https://doc.rust-lang.org/1.85.0/std/primitive.reference.html">&mut T</a>, &mut <a class="primitive" href="https://doc.rust-lang.org/1.85.0/std/primitive.slice.html">[T]</a>)></h4></section></summary><div class="docblock"><p>Returns the last and all the rest of the elements of the slice, or <code>None</code> if it is empty.</p>
<h5 id="examples-11"><a class="doc-anchor" href="#examples-11">§</a>Examples</h5>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>x = <span class="kw-2">&mut </span>[<span class="number">0</span>, <span class="number">1</span>, <span class="number">2</span>];
<span class="kw">if let </span><span class="prelude-val">Some</span>((last, elements)) = x.split_last_mut() {
<span class="kw-2">*</span>last = <span class="number">3</span>;
elements[<span class="number">0</span>] = <span class="number">4</span>;
elements[<span class="number">1</span>] = <span class="number">5</span>;
}
<span class="macro">assert_eq!</span>(x, <span class="kw-2">&</span>[<span class="number">4</span>, <span class="number">5</span>, <span class="number">3</span>]);</code></pre></div>
</div></details><details class="toggle method-toggle" open><summary><section id="method.last" class="method"><span class="rightside"><span class="since" title="Stable since Rust version 1.0.0">1.0.0</span> · <a class="src" href="https://doc.rust-lang.org/1.85.0/src/core/slice/mod.rs.html#281">Source</a></span><h4 class="code-header">pub fn <a href="#method.last" class="fn">last</a>(&self) -> <a class="enum" href="https://doc.rust-lang.org/1.85.0/core/option/enum.Option.html" title="enum core::option::Option">Option</a><<a class="primitive" href="https://doc.rust-lang.org/1.85.0/std/primitive.reference.html">&T</a>></h4></section></summary><div class="docblock"><p>Returns the last element of the slice, or <code>None</code> if it is empty.</p>
<h5 id="examples-12"><a class="doc-anchor" href="#examples-12">§</a>Examples</h5>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>v = [<span class="number">10</span>, <span class="number">40</span>, <span class="number">30</span>];
<span class="macro">assert_eq!</span>(<span class="prelude-val">Some</span>(<span class="kw-2">&</span><span class="number">30</span>), v.last());
<span class="kw">let </span>w: <span class="kw-2">&</span>[i32] = <span class="kw-2">&</span>[];
<span class="macro">assert_eq!</span>(<span class="prelude-val">None</span>, w.last());</code></pre></div>
</div></details><details class="toggle method-toggle" open><summary><section id="method.last_mut" class="method"><span class="rightside"><span class="since" title="Stable since Rust version 1.0.0">1.0.0</span> · <a class="src" href="https://doc.rust-lang.org/1.85.0/src/core/slice/mod.rs.html#304">Source</a></span><h4 class="code-header">pub fn <a href="#method.last_mut" class="fn">last_mut</a>(&mut self) -> <a class="enum" href="https://doc.rust-lang.org/1.85.0/core/option/enum.Option.html" title="enum core::option::Option">Option</a><<a class="primitive" href="https://doc.rust-lang.org/1.85.0/std/primitive.reference.html">&mut T</a>></h4></section></summary><div class="docblock"><p>Returns a mutable reference to the last item in the slice, or <code>None</code> if it is empty.</p>
<h5 id="examples-13"><a class="doc-anchor" href="#examples-13">§</a>Examples</h5>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>x = <span class="kw-2">&mut </span>[<span class="number">0</span>, <span class="number">1</span>, <span class="number">2</span>];
<span class="kw">if let </span><span class="prelude-val">Some</span>(last) = x.last_mut() {
<span class="kw-2">*</span>last = <span class="number">10</span>;
}
<span class="macro">assert_eq!</span>(x, <span class="kw-2">&</span>[<span class="number">0</span>, <span class="number">1</span>, <span class="number">10</span>]);
<span class="kw">let </span>y: <span class="kw-2">&mut </span>[i32] = <span class="kw-2">&mut </span>[];
<span class="macro">assert_eq!</span>(<span class="prelude-val">None</span>, y.last_mut());</code></pre></div>
</div></details><details class="toggle method-toggle" open><summary><section id="method.first_chunk" class="method"><span class="rightside"><span class="since" title="Stable since Rust version 1.77.0">1.77.0</span> · <a class="src" href="https://doc.rust-lang.org/1.85.0/src/core/slice/mod.rs.html#327">Source</a></span><h4 class="code-header">pub fn <a href="#method.first_chunk" class="fn">first_chunk</a><const N: <a class="primitive" href="https://doc.rust-lang.org/1.85.0/std/primitive.usize.html">usize</a>>(&self) -> <a class="enum" href="https://doc.rust-lang.org/1.85.0/core/option/enum.Option.html" title="enum core::option::Option">Option</a><&<a class="primitive" href="https://doc.rust-lang.org/1.85.0/std/primitive.array.html">[T; N]</a>></h4></section></summary><div class="docblock"><p>Returns an array reference to the first <code>N</code> items in the slice.</p>
<p>If the slice is not at least <code>N</code> in length, this will return <code>None</code>.</p>
<h5 id="examples-14"><a class="doc-anchor" href="#examples-14">§</a>Examples</h5>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>u = [<span class="number">10</span>, <span class="number">40</span>, <span class="number">30</span>];
<span class="macro">assert_eq!</span>(<span class="prelude-val">Some</span>(<span class="kw-2">&</span>[<span class="number">10</span>, <span class="number">40</span>]), u.first_chunk::<<span class="number">2</span>>());
<span class="kw">let </span>v: <span class="kw-2">&</span>[i32] = <span class="kw-2">&</span>[<span class="number">10</span>];
<span class="macro">assert_eq!</span>(<span class="prelude-val">None</span>, v.first_chunk::<<span class="number">2</span>>());
<span class="kw">let </span>w: <span class="kw-2">&</span>[i32] = <span class="kw-2">&</span>[];
<span class="macro">assert_eq!</span>(<span class="prelude-val">Some</span>(<span class="kw-2">&</span>[]), w.first_chunk::<<span class="number">0</span>>());</code></pre></div>
</div></details><details class="toggle method-toggle" open><summary><section id="method.first_chunk_mut" class="method"><span class="rightside"><span class="since" title="Stable since Rust version 1.77.0">1.77.0</span> · <a class="src" href="https://doc.rust-lang.org/1.85.0/src/core/slice/mod.rs.html#357">Source</a></span><h4 class="code-header">pub fn <a href="#method.first_chunk_mut" class="fn">first_chunk_mut</a><const N: <a class="primitive" href="https://doc.rust-lang.org/1.85.0/std/primitive.usize.html">usize</a>>(&mut self) -> <a class="enum" href="https://doc.rust-lang.org/1.85.0/core/option/enum.Option.html" title="enum core::option::Option">Option</a><&mut <a class="primitive" href="https://doc.rust-lang.org/1.85.0/std/primitive.array.html">[T; N]</a>></h4></section></summary><div class="docblock"><p>Returns a mutable array reference to the first <code>N</code> items in the slice.</p>
<p>If the slice is not at least <code>N</code> in length, this will return <code>None</code>.</p>
<h5 id="examples-15"><a class="doc-anchor" href="#examples-15">§</a>Examples</h5>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>x = <span class="kw-2">&mut </span>[<span class="number">0</span>, <span class="number">1</span>, <span class="number">2</span>];
<span class="kw">if let </span><span class="prelude-val">Some</span>(first) = x.first_chunk_mut::<<span class="number">2</span>>() {
first[<span class="number">0</span>] = <span class="number">5</span>;
first[<span class="number">1</span>] = <span class="number">4</span>;
}
<span class="macro">assert_eq!</span>(x, <span class="kw-2">&</span>[<span class="number">5</span>, <span class="number">4</span>, <span class="number">2</span>]);
<span class="macro">assert_eq!</span>(<span class="prelude-val">None</span>, x.first_chunk_mut::<<span class="number">4</span>>());</code></pre></div>
</div></details><details class="toggle method-toggle" open><summary><section id="method.split_first_chunk" class="method"><span class="rightside"><span class="since" title="Stable since Rust version 1.77.0">1.77.0</span> · <a class="src" href="https://doc.rust-lang.org/1.85.0/src/core/slice/mod.rs.html#387">Source</a></span><h4 class="code-header">pub fn <a href="#method.split_first_chunk" class="fn">split_first_chunk</a><const N: <a class="primitive" href="https://doc.rust-lang.org/1.85.0/std/primitive.usize.html">usize</a>>(&self) -> <a class="enum" href="https://doc.rust-lang.org/1.85.0/core/option/enum.Option.html" title="enum core::option::Option">Option</a><(&<a class="primitive" href="https://doc.rust-lang.org/1.85.0/std/primitive.array.html">[T; N]</a>, &<a class="primitive" href="https://doc.rust-lang.org/1.85.0/std/primitive.slice.html">[T]</a>)></h4></section></summary><div class="docblock"><p>Returns an array reference to the first <code>N</code> items in the slice and the remaining slice.</p>
<p>If the slice is not at least <code>N</code> in length, this will return <code>None</code>.</p>
<h5 id="examples-16"><a class="doc-anchor" href="#examples-16">§</a>Examples</h5>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>x = <span class="kw-2">&</span>[<span class="number">0</span>, <span class="number">1</span>, <span class="number">2</span>];
<span class="kw">if let </span><span class="prelude-val">Some</span>((first, elements)) = x.split_first_chunk::<<span class="number">2</span>>() {
<span class="macro">assert_eq!</span>(first, <span class="kw-2">&</span>[<span class="number">0</span>, <span class="number">1</span>]);
<span class="macro">assert_eq!</span>(elements, <span class="kw-2">&</span>[<span class="number">2</span>]);
}
<span class="macro">assert_eq!</span>(<span class="prelude-val">None</span>, x.split_first_chunk::<<span class="number">4</span>>());</code></pre></div>
</div></details><details class="toggle method-toggle" open><summary><section id="method.split_first_chunk_mut" class="method"><span class="rightside"><span class="since" title="Stable since Rust version 1.77.0">1.77.0</span> · <a class="src" href="https://doc.rust-lang.org/1.85.0/src/core/slice/mod.rs.html#422-424">Source</a></span><h4 class="code-header">pub fn <a href="#method.split_first_chunk_mut" class="fn">split_first_chunk_mut</a><const N: <a class="primitive" href="https://doc.rust-lang.org/1.85.0/std/primitive.usize.html">usize</a>>(
&mut self,
) -> <a class="enum" href="https://doc.rust-lang.org/1.85.0/core/option/enum.Option.html" title="enum core::option::Option">Option</a><(&mut <a class="primitive" href="https://doc.rust-lang.org/1.85.0/std/primitive.array.html">[T; N]</a>, &mut <a class="primitive" href="https://doc.rust-lang.org/1.85.0/std/primitive.slice.html">[T]</a>)></h4></section></summary><div class="docblock"><p>Returns a mutable array reference to the first <code>N</code> items in the slice and the remaining
slice.</p>
<p>If the slice is not at least <code>N</code> in length, this will return <code>None</code>.</p>
<h5 id="examples-17"><a class="doc-anchor" href="#examples-17">§</a>Examples</h5>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>x = <span class="kw-2">&mut </span>[<span class="number">0</span>, <span class="number">1</span>, <span class="number">2</span>];
<span class="kw">if let </span><span class="prelude-val">Some</span>((first, elements)) = x.split_first_chunk_mut::<<span class="number">2</span>>() {
first[<span class="number">0</span>] = <span class="number">3</span>;
first[<span class="number">1</span>] = <span class="number">4</span>;
elements[<span class="number">0</span>] = <span class="number">5</span>;
}
<span class="macro">assert_eq!</span>(x, <span class="kw-2">&</span>[<span class="number">3</span>, <span class="number">4</span>, <span class="number">5</span>]);
<span class="macro">assert_eq!</span>(<span class="prelude-val">None</span>, x.split_first_chunk_mut::<<span class="number">4</span>>());</code></pre></div>
</div></details><details class="toggle method-toggle" open><summary><section id="method.split_last_chunk" class="method"><span class="rightside"><span class="since" title="Stable since Rust version 1.77.0">1.77.0</span> · <a class="src" href="https://doc.rust-lang.org/1.85.0/src/core/slice/mod.rs.html#457">Source</a></span><h4 class="code-header">pub fn <a href="#method.split_last_chunk" class="fn">split_last_chunk</a><const N: <a class="primitive" href="https://doc.rust-lang.org/1.85.0/std/primitive.usize.html">usize</a>>(&self) -> <a class="enum" href="https://doc.rust-lang.org/1.85.0/core/option/enum.Option.html" title="enum core::option::Option">Option</a><(&<a class="primitive" href="https://doc.rust-lang.org/1.85.0/std/primitive.slice.html">[T]</a>, &<a class="primitive" href="https://doc.rust-lang.org/1.85.0/std/primitive.array.html">[T; N]</a>)></h4></section></summary><div class="docblock"><p>Returns an array reference to the last <code>N</code> items in the slice and the remaining slice.</p>
<p>If the slice is not at least <code>N</code> in length, this will return <code>None</code>.</p>
<h5 id="examples-18"><a class="doc-anchor" href="#examples-18">§</a>Examples</h5>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>x = <span class="kw-2">&</span>[<span class="number">0</span>, <span class="number">1</span>, <span class="number">2</span>];
<span class="kw">if let </span><span class="prelude-val">Some</span>((elements, last)) = x.split_last_chunk::<<span class="number">2</span>>() {
<span class="macro">assert_eq!</span>(elements, <span class="kw-2">&</span>[<span class="number">0</span>]);
<span class="macro">assert_eq!</span>(last, <span class="kw-2">&</span>[<span class="number">1</span>, <span class="number">2</span>]);
}
<span class="macro">assert_eq!</span>(<span class="prelude-val">None</span>, x.split_last_chunk::<<span class="number">4</span>>());</code></pre></div>
</div></details><details class="toggle method-toggle" open><summary><section id="method.split_last_chunk_mut" class="method"><span class="rightside"><span class="since" title="Stable since Rust version 1.77.0">1.77.0</span> · <a class="src" href="https://doc.rust-lang.org/1.85.0/src/core/slice/mod.rs.html#492-494">Source</a></span><h4 class="code-header">pub fn <a href="#method.split_last_chunk_mut" class="fn">split_last_chunk_mut</a><const N: <a class="primitive" href="https://doc.rust-lang.org/1.85.0/std/primitive.usize.html">usize</a>>(
&mut self,
) -> <a class="enum" href="https://doc.rust-lang.org/1.85.0/core/option/enum.Option.html" title="enum core::option::Option">Option</a><(&mut <a class="primitive" href="https://doc.rust-lang.org/1.85.0/std/primitive.slice.html">[T]</a>, &mut <a class="primitive" href="https://doc.rust-lang.org/1.85.0/std/primitive.array.html">[T; N]</a>)></h4></section></summary><div class="docblock"><p>Returns a mutable array reference to the last <code>N</code> items in the slice and the remaining
slice.</p>
<p>If the slice is not at least <code>N</code> in length, this will return <code>None</code>.</p>
<h5 id="examples-19"><a class="doc-anchor" href="#examples-19">§</a>Examples</h5>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>x = <span class="kw-2">&mut </span>[<span class="number">0</span>, <span class="number">1</span>, <span class="number">2</span>];
<span class="kw">if let </span><span class="prelude-val">Some</span>((elements, last)) = x.split_last_chunk_mut::<<span class="number">2</span>>() {
last[<span class="number">0</span>] = <span class="number">3</span>;
last[<span class="number">1</span>] = <span class="number">4</span>;
elements[<span class="number">0</span>] = <span class="number">5</span>;
}
<span class="macro">assert_eq!</span>(x, <span class="kw-2">&</span>[<span class="number">5</span>, <span class="number">3</span>, <span class="number">4</span>]);
<span class="macro">assert_eq!</span>(<span class="prelude-val">None</span>, x.split_last_chunk_mut::<<span class="number">4</span>>());</code></pre></div>
</div></details><details class="toggle method-toggle" open><summary><section id="method.last_chunk" class="method"><span class="rightside"><span class="since" title="Stable since Rust version 1.77.0">1.77.0</span> · <a class="src" href="https://doc.rust-lang.org/1.85.0/src/core/slice/mod.rs.html#527">Source</a></span><h4 class="code-header">pub fn <a href="#method.last_chunk" class="fn">last_chunk</a><const N: <a class="primitive" href="https://doc.rust-lang.org/1.85.0/std/primitive.usize.html">usize</a>>(&self) -> <a class="enum" href="https://doc.rust-lang.org/1.85.0/core/option/enum.Option.html" title="enum core::option::Option">Option</a><&<a class="primitive" href="https://doc.rust-lang.org/1.85.0/std/primitive.array.html">[T; N]</a>></h4></section></summary><div class="docblock"><p>Returns an array reference to the last <code>N</code> items in the slice.</p>
<p>If the slice is not at least <code>N</code> in length, this will return <code>None</code>.</p>
<h5 id="examples-20"><a class="doc-anchor" href="#examples-20">§</a>Examples</h5>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>u = [<span class="number">10</span>, <span class="number">40</span>, <span class="number">30</span>];
<span class="macro">assert_eq!</span>(<span class="prelude-val">Some</span>(<span class="kw-2">&</span>[<span class="number">40</span>, <span class="number">30</span>]), u.last_chunk::<<span class="number">2</span>>());
<span class="kw">let </span>v: <span class="kw-2">&</span>[i32] = <span class="kw-2">&</span>[<span class="number">10</span>];
<span class="macro">assert_eq!</span>(<span class="prelude-val">None</span>, v.last_chunk::<<span class="number">2</span>>());
<span class="kw">let </span>w: <span class="kw-2">&</span>[i32] = <span class="kw-2">&</span>[];
<span class="macro">assert_eq!</span>(<span class="prelude-val">Some</span>(<span class="kw-2">&</span>[]), w.last_chunk::<<span class="number">0</span>>());</code></pre></div>
</div></details><details class="toggle method-toggle" open><summary><section id="method.last_chunk_mut" class="method"><span class="rightside"><span class="since" title="Stable since Rust version 1.77.0">1.77.0</span> · <a class="src" href="https://doc.rust-lang.org/1.85.0/src/core/slice/mod.rs.html#561">Source</a></span><h4 class="code-header">pub fn <a href="#method.last_chunk_mut" class="fn">last_chunk_mut</a><const N: <a class="primitive" href="https://doc.rust-lang.org/1.85.0/std/primitive.usize.html">usize</a>>(&mut self) -> <a class="enum" href="https://doc.rust-lang.org/1.85.0/core/option/enum.Option.html" title="enum core::option::Option">Option</a><&mut <a class="primitive" href="https://doc.rust-lang.org/1.85.0/std/primitive.array.html">[T; N]</a>></h4></section></summary><div class="docblock"><p>Returns a mutable array reference to the last <code>N</code> items in the slice.</p>
<p>If the slice is not at least <code>N</code> in length, this will return <code>None</code>.</p>
<h5 id="examples-21"><a class="doc-anchor" href="#examples-21">§</a>Examples</h5>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>x = <span class="kw-2">&mut </span>[<span class="number">0</span>, <span class="number">1</span>, <span class="number">2</span>];
<span class="kw">if let </span><span class="prelude-val">Some</span>(last) = x.last_chunk_mut::<<span class="number">2</span>>() {
last[<span class="number">0</span>] = <span class="number">10</span>;
last[<span class="number">1</span>] = <span class="number">20</span>;
}
<span class="macro">assert_eq!</span>(x, <span class="kw-2">&</span>[<span class="number">0</span>, <span class="number">10</span>, <span class="number">20</span>]);
<span class="macro">assert_eq!</span>(<span class="prelude-val">None</span>, x.last_chunk_mut::<<span class="number">4</span>>());</code></pre></div>
</div></details><details class="toggle method-toggle" open><summary><section id="method.get" class="method"><span class="rightside"><span class="since" title="Stable since Rust version 1.0.0">1.0.0</span> · <a class="src" href="https://doc.rust-lang.org/1.85.0/src/core/slice/mod.rs.html#596-598">Source</a></span><h4 class="code-header">pub fn <a href="#method.get" class="fn">get</a><I>(&self, index: I) -> <a class="enum" href="https://doc.rust-lang.org/1.85.0/core/option/enum.Option.html" title="enum core::option::Option">Option</a><&<I as <a class="trait" href="https://doc.rust-lang.org/1.85.0/core/slice/index/trait.SliceIndex.html" title="trait core::slice::index::SliceIndex">SliceIndex</a><<a class="primitive" href="https://doc.rust-lang.org/1.85.0/std/primitive.slice.html">[T]</a>>>::<a class="associatedtype" href="https://doc.rust-lang.org/1.85.0/core/slice/index/trait.SliceIndex.html#associatedtype.Output" title="type core::slice::index::SliceIndex::Output">Output</a>><div class="where">where
I: <a class="trait" href="https://doc.rust-lang.org/1.85.0/core/slice/index/trait.SliceIndex.html" title="trait core::slice::index::SliceIndex">SliceIndex</a><<a class="primitive" href="https://doc.rust-lang.org/1.85.0/std/primitive.slice.html">[T]</a>>,</div></h4></section></summary><div class="docblock"><p>Returns a reference to an element or subslice depending on the type of
index.</p>
<ul>
<li>If given a position, returns a reference to the element at that
position or <code>None</code> if out of bounds.</li>
<li>If given a range, returns the subslice corresponding to that range,
or <code>None</code> if out of bounds.</li>
</ul>
<h5 id="examples-22"><a class="doc-anchor" href="#examples-22">§</a>Examples</h5>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>v = [<span class="number">10</span>, <span class="number">40</span>, <span class="number">30</span>];
<span class="macro">assert_eq!</span>(<span class="prelude-val">Some</span>(<span class="kw-2">&</span><span class="number">40</span>), v.get(<span class="number">1</span>));
<span class="macro">assert_eq!</span>(<span class="prelude-val">Some</span>(<span class="kw-2">&</span>[<span class="number">10</span>, <span class="number">40</span>][..]), v.get(<span class="number">0</span>..<span class="number">2</span>));
<span class="macro">assert_eq!</span>(<span class="prelude-val">None</span>, v.get(<span class="number">3</span>));
<span class="macro">assert_eq!</span>(<span class="prelude-val">None</span>, v.get(<span class="number">0</span>..<span class="number">4</span>));</code></pre></div>
</div></details><details class="toggle method-toggle" open><summary><section id="method.get_mut" class="method"><span class="rightside"><span class="since" title="Stable since Rust version 1.0.0">1.0.0</span> · <a class="src" href="https://doc.rust-lang.org/1.85.0/src/core/slice/mod.rs.html#621-623">Source</a></span><h4 class="code-header">pub fn <a href="#method.get_mut" class="fn">get_mut</a><I>(
&mut self,
index: I,
) -> <a class="enum" href="https://doc.rust-lang.org/1.85.0/core/option/enum.Option.html" title="enum core::option::Option">Option</a><&mut <I as <a class="trait" href="https://doc.rust-lang.org/1.85.0/core/slice/index/trait.SliceIndex.html" title="trait core::slice::index::SliceIndex">SliceIndex</a><<a class="primitive" href="https://doc.rust-lang.org/1.85.0/std/primitive.slice.html">[T]</a>>>::<a class="associatedtype" href="https://doc.rust-lang.org/1.85.0/core/slice/index/trait.SliceIndex.html#associatedtype.Output" title="type core::slice::index::SliceIndex::Output">Output</a>><div class="where">where
I: <a class="trait" href="https://doc.rust-lang.org/1.85.0/core/slice/index/trait.SliceIndex.html" title="trait core::slice::index::SliceIndex">SliceIndex</a><<a class="primitive" href="https://doc.rust-lang.org/1.85.0/std/primitive.slice.html">[T]</a>>,</div></h4></section></summary><div class="docblock"><p>Returns a mutable reference to an element or subslice depending on the
type of index (see <a href="https://doc.rust-lang.org/1.85.0/std/primitive.slice.html#method.get" title="method slice::get"><code>get</code></a>) or <code>None</code> if the index is out of bounds.</p>
<h5 id="examples-23"><a class="doc-anchor" href="#examples-23">§</a>Examples</h5>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>x = <span class="kw-2">&mut </span>[<span class="number">0</span>, <span class="number">1</span>, <span class="number">2</span>];
<span class="kw">if let </span><span class="prelude-val">Some</span>(elem) = x.get_mut(<span class="number">1</span>) {
<span class="kw-2">*</span>elem = <span class="number">42</span>;
}
<span class="macro">assert_eq!</span>(x, <span class="kw-2">&</span>[<span class="number">0</span>, <span class="number">42</span>, <span class="number">2</span>]);</code></pre></div>
</div></details><details class="toggle method-toggle" open><summary><section id="method.get_unchecked" class="method"><span class="rightside"><span class="since" title="Stable since Rust version 1.0.0">1.0.0</span> · <a class="src" href="https://doc.rust-lang.org/1.85.0/src/core/slice/mod.rs.html#658-660">Source</a></span><h4 class="code-header">pub unsafe fn <a href="#method.get_unchecked" class="fn">get_unchecked</a><I>(
&self,
index: I,
) -> &<I as <a class="trait" href="https://doc.rust-lang.org/1.85.0/core/slice/index/trait.SliceIndex.html" title="trait core::slice::index::SliceIndex">SliceIndex</a><<a class="primitive" href="https://doc.rust-lang.org/1.85.0/std/primitive.slice.html">[T]</a>>>::<a class="associatedtype" href="https://doc.rust-lang.org/1.85.0/core/slice/index/trait.SliceIndex.html#associatedtype.Output" title="type core::slice::index::SliceIndex::Output">Output</a><div class="where">where
I: <a class="trait" href="https://doc.rust-lang.org/1.85.0/core/slice/index/trait.SliceIndex.html" title="trait core::slice::index::SliceIndex">SliceIndex</a><<a class="primitive" href="https://doc.rust-lang.org/1.85.0/std/primitive.slice.html">[T]</a>>,</div></h4></section></summary><div class="docblock"><p>Returns a reference to an element or subslice, without doing bounds
checking.</p>
<p>For a safe alternative see <a href="https://doc.rust-lang.org/1.85.0/std/primitive.slice.html#method.get" title="method slice::get"><code>get</code></a>.</p>
<h5 id="safety-1"><a class="doc-anchor" href="#safety-1">§</a>Safety</h5>
<p>Calling this method with an out-of-bounds index is <em><a href="https://doc.rust-lang.org/reference/behavior-considered-undefined.html">undefined behavior</a></em>
even if the resulting reference is not used.</p>
<p>You can think of this like <code>.get(index).unwrap_unchecked()</code>. It’s UB
to call <code>.get_unchecked(len)</code>, even if you immediately convert to a
pointer. And it’s UB to call <code>.get_unchecked(..len + 1)</code>,
<code>.get_unchecked(..=len)</code>, or similar.</p>
<h5 id="examples-24"><a class="doc-anchor" href="#examples-24">§</a>Examples</h5>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>x = <span class="kw-2">&</span>[<span class="number">1</span>, <span class="number">2</span>, <span class="number">4</span>];
<span class="kw">unsafe </span>{
<span class="macro">assert_eq!</span>(x.get_unchecked(<span class="number">1</span>), <span class="kw-2">&</span><span class="number">2</span>);
}</code></pre></div>
</div></details><details class="toggle method-toggle" open><summary><section id="method.get_unchecked_mut" class="method"><span class="rightside"><span class="since" title="Stable since Rust version 1.0.0">1.0.0</span> · <a class="src" href="https://doc.rust-lang.org/1.85.0/src/core/slice/mod.rs.html#700-702">Source</a></span><h4 class="code-header">pub unsafe fn <a href="#method.get_unchecked_mut" class="fn">get_unchecked_mut</a><I>(
&mut self,
index: I,
) -> &mut <I as <a class="trait" href="https://doc.rust-lang.org/1.85.0/core/slice/index/trait.SliceIndex.html" title="trait core::slice::index::SliceIndex">SliceIndex</a><<a class="primitive" href="https://doc.rust-lang.org/1.85.0/std/primitive.slice.html">[T]</a>>>::<a class="associatedtype" href="https://doc.rust-lang.org/1.85.0/core/slice/index/trait.SliceIndex.html#associatedtype.Output" title="type core::slice::index::SliceIndex::Output">Output</a><div class="where">where
I: <a class="trait" href="https://doc.rust-lang.org/1.85.0/core/slice/index/trait.SliceIndex.html" title="trait core::slice::index::SliceIndex">SliceIndex</a><<a class="primitive" href="https://doc.rust-lang.org/1.85.0/std/primitive.slice.html">[T]</a>>,</div></h4></section></summary><div class="docblock"><p>Returns a mutable reference to an element or subslice, without doing
bounds checking.</p>
<p>For a safe alternative see <a href="https://doc.rust-lang.org/1.85.0/std/primitive.slice.html#method.get_mut" title="method slice::get_mut"><code>get_mut</code></a>.</p>
<h5 id="safety-2"><a class="doc-anchor" href="#safety-2">§</a>Safety</h5>
<p>Calling this method with an out-of-bounds index is <em><a href="https://doc.rust-lang.org/reference/behavior-considered-undefined.html">undefined behavior</a></em>
even if the resulting reference is not used.</p>
<p>You can think of this like <code>.get_mut(index).unwrap_unchecked()</code>. It’s
UB to call <code>.get_unchecked_mut(len)</code>, even if you immediately convert
to a pointer. And it’s UB to call <code>.get_unchecked_mut(..len + 1)</code>,
<code>.get_unchecked_mut(..=len)</code>, or similar.</p>
<h5 id="examples-25"><a class="doc-anchor" href="#examples-25">§</a>Examples</h5>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>x = <span class="kw-2">&mut </span>[<span class="number">1</span>, <span class="number">2</span>, <span class="number">4</span>];
<span class="kw">unsafe </span>{
<span class="kw">let </span>elem = x.get_unchecked_mut(<span class="number">1</span>);
<span class="kw-2">*</span>elem = <span class="number">13</span>;
}
<span class="macro">assert_eq!</span>(x, <span class="kw-2">&</span>[<span class="number">1</span>, <span class="number">13</span>, <span class="number">4</span>]);</code></pre></div>
</div></details><details class="toggle method-toggle" open><summary><section id="method.as_ptr" class="method"><span class="rightside"><span class="since" title="Stable since Rust version 1.0.0">1.0.0</span> · <a class="src" href="https://doc.rust-lang.org/1.85.0/src/core/slice/mod.rs.html#742">Source</a></span><h4 class="code-header">pub fn <a href="#method.as_ptr" class="fn">as_ptr</a>(&self) -> <a class="primitive" href="https://doc.rust-lang.org/1.85.0/std/primitive.pointer.html">*const T</a></h4></section></summary><div class="docblock"><p>Returns a raw pointer to the slice’s buffer.</p>
<p>The caller must ensure that the slice outlives the pointer this
function returns, or else it will end up dangling.</p>
<p>The caller must also ensure that the memory the pointer (non-transitively) points to
is never written to (except inside an <code>UnsafeCell</code>) using this pointer or any pointer
derived from it. If you need to mutate the contents of the slice, use <a href="https://doc.rust-lang.org/1.85.0/std/primitive.slice.html#method.as_mut_ptr" title="method slice::as_mut_ptr"><code>as_mut_ptr</code></a>.</p>
<p>Modifying the container referenced by this slice may cause its buffer
to be reallocated, which would also make any pointers to it invalid.</p>
<h5 id="examples-26"><a class="doc-anchor" href="#examples-26">§</a>Examples</h5>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>x = <span class="kw-2">&</span>[<span class="number">1</span>, <span class="number">2</span>, <span class="number">4</span>];
<span class="kw">let </span>x_ptr = x.as_ptr();
<span class="kw">unsafe </span>{
<span class="kw">for </span>i <span class="kw">in </span><span class="number">0</span>..x.len() {
<span class="macro">assert_eq!</span>(x.get_unchecked(i), <span class="kw-2">&*</span>x_ptr.add(i));
}
}</code></pre></div>
</div></details><details class="toggle method-toggle" open><summary><section id="method.as_mut_ptr" class="method"><span class="rightside"><span class="since" title="Stable since Rust version 1.0.0">1.0.0</span> · <a class="src" href="https://doc.rust-lang.org/1.85.0/src/core/slice/mod.rs.html#773">Source</a></span><h4 class="code-header">pub fn <a href="#method.as_mut_ptr" class="fn">as_mut_ptr</a>(&mut self) -> <a class="primitive" href="https://doc.rust-lang.org/1.85.0/std/primitive.pointer.html">*mut T</a></h4></section></summary><div class="docblock"><p>Returns an unsafe mutable pointer to the slice’s buffer.</p>
<p>The caller must ensure that the slice outlives the pointer this
function returns, or else it will end up dangling.</p>
<p>Modifying the container referenced by this slice may cause its buffer
to be reallocated, which would also make any pointers to it invalid.</p>
<h5 id="examples-27"><a class="doc-anchor" href="#examples-27">§</a>Examples</h5>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>x = <span class="kw-2">&mut </span>[<span class="number">1</span>, <span class="number">2</span>, <span class="number">4</span>];
<span class="kw">let </span>x_ptr = x.as_mut_ptr();
<span class="kw">unsafe </span>{
<span class="kw">for </span>i <span class="kw">in </span><span class="number">0</span>..x.len() {
<span class="kw-2">*</span>x_ptr.add(i) += <span class="number">2</span>;
}
}
<span class="macro">assert_eq!</span>(x, <span class="kw-2">&</span>[<span class="number">3</span>, <span class="number">4</span>, <span class="number">6</span>]);</code></pre></div>
</div></details><details class="toggle method-toggle" open><summary><section id="method.as_ptr_range" class="method"><span class="rightside"><span class="since" title="Stable since Rust version 1.48.0">1.48.0</span> · <a class="src" href="https://doc.rust-lang.org/1.85.0/src/core/slice/mod.rs.html#809">Source</a></span><h4 class="code-header">pub fn <a href="#method.as_ptr_range" class="fn">as_ptr_range</a>(&self) -> <a class="struct" href="https://doc.rust-lang.org/1.85.0/core/ops/range/struct.Range.html" title="struct core::ops::range::Range">Range</a><<a class="primitive" href="https://doc.rust-lang.org/1.85.0/std/primitive.pointer.html">*const T</a>></h4></section></summary><div class="docblock"><p>Returns the two raw pointers spanning the slice.</p>
<p>The returned range is half-open, which means that the end pointer
points <em>one past</em> the last element of the slice. This way, an empty
slice is represented by two equal pointers, and the difference between
the two pointers represents the size of the slice.</p>
<p>See <a href="https://doc.rust-lang.org/1.85.0/std/primitive.slice.html#method.as_ptr" title="method slice::as_ptr"><code>as_ptr</code></a> for warnings on using these pointers. The end pointer
requires extra caution, as it does not point to a valid element in the
slice.</p>
<p>This function is useful for interacting with foreign interfaces which
use two pointers to refer to a range of elements in memory, as is
common in C++.</p>
<p>It can also be useful to check if a pointer to an element refers to an
element of this slice:</p>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>a = [<span class="number">1</span>, <span class="number">2</span>, <span class="number">3</span>];
<span class="kw">let </span>x = <span class="kw-2">&</span>a[<span class="number">1</span>] <span class="kw">as </span><span class="kw-2">*const </span><span class="kw">_</span>;
<span class="kw">let </span>y = <span class="kw-2">&</span><span class="number">5 </span><span class="kw">as </span><span class="kw-2">*const </span><span class="kw">_</span>;
<span class="macro">assert!</span>(a.as_ptr_range().contains(<span class="kw-2">&</span>x));
<span class="macro">assert!</span>(!a.as_ptr_range().contains(<span class="kw-2">&</span>y));</code></pre></div>
</div></details><details class="toggle method-toggle" open><summary><section id="method.as_mut_ptr_range" class="method"><span class="rightside"><span class="since" title="Stable since Rust version 1.48.0">1.48.0</span> · <a class="src" href="https://doc.rust-lang.org/1.85.0/src/core/slice/mod.rs.html#852">Source</a></span><h4 class="code-header">pub fn <a href="#method.as_mut_ptr_range" class="fn">as_mut_ptr_range</a>(&mut self) -> <a class="struct" href="https://doc.rust-lang.org/1.85.0/core/ops/range/struct.Range.html" title="struct core::ops::range::Range">Range</a><<a class="primitive" href="https://doc.rust-lang.org/1.85.0/std/primitive.pointer.html">*mut T</a>></h4></section></summary><div class="docblock"><p>Returns the two unsafe mutable pointers spanning the slice.</p>
<p>The returned range is half-open, which means that the end pointer
points <em>one past</em> the last element of the slice. This way, an empty
slice is represented by two equal pointers, and the difference between
the two pointers represents the size of the slice.</p>
<p>See <a href="https://doc.rust-lang.org/1.85.0/std/primitive.slice.html#method.as_mut_ptr" title="method slice::as_mut_ptr"><code>as_mut_ptr</code></a> for warnings on using these pointers. The end
pointer requires extra caution, as it does not point to a valid element
in the slice.</p>
<p>This function is useful for interacting with foreign interfaces which
use two pointers to refer to a range of elements in memory, as is
common in C++.</p>
</div></details><details class="toggle method-toggle" open><summary><section id="method.as_array" class="method"><a class="src rightside" href="https://doc.rust-lang.org/1.85.0/src/core/slice/mod.rs.html#865">Source</a><h4 class="code-header">pub fn <a href="#method.as_array" class="fn">as_array</a><const N: <a class="primitive" href="https://doc.rust-lang.org/1.85.0/std/primitive.usize.html">usize</a>>(&self) -> <a class="enum" href="https://doc.rust-lang.org/1.85.0/core/option/enum.Option.html" title="enum core::option::Option">Option</a><&<a class="primitive" href="https://doc.rust-lang.org/1.85.0/std/primitive.array.html">[T; N]</a>></h4></section><span class="item-info"><div class="stab unstable"><span class="emoji">🔬</span><span>This is a nightly-only experimental API. (<code>slice_as_array</code>)</span></div></span></summary><div class="docblock"><p>Gets a reference to the underlying array.</p>
<p>If <code>N</code> is not exactly equal to the length of <code>self</code>, then this method returns <code>None</code>.</p>
</div></details><details class="toggle method-toggle" open><summary><section id="method.as_mut_array" class="method"><a class="src rightside" href="https://doc.rust-lang.org/1.85.0/src/core/slice/mod.rs.html#883">Source</a><h4 class="code-header">pub fn <a href="#method.as_mut_array" class="fn">as_mut_array</a><const N: <a class="primitive" href="https://doc.rust-lang.org/1.85.0/std/primitive.usize.html">usize</a>>(&mut self) -> <a class="enum" href="https://doc.rust-lang.org/1.85.0/core/option/enum.Option.html" title="enum core::option::Option">Option</a><&mut <a class="primitive" href="https://doc.rust-lang.org/1.85.0/std/primitive.array.html">[T; N]</a>></h4></section><span class="item-info"><div class="stab unstable"><span class="emoji">🔬</span><span>This is a nightly-only experimental API. (<code>slice_as_array</code>)</span></div></span></summary><div class="docblock"><p>Gets a mutable reference to the slice’s underlying array.</p>
<p>If <code>N</code> is not exactly equal to the length of <code>self</code>, then this method returns <code>None</code>.</p>
</div></details><details class="toggle method-toggle" open><summary><section id="method.swap" class="method"><span class="rightside"><span class="since" title="Stable since Rust version 1.0.0">1.0.0</span> · <a class="src" href="https://doc.rust-lang.org/1.85.0/src/core/slice/mod.rs.html#919">Source</a></span><h4 class="code-header">pub fn <a href="#method.swap" class="fn">swap</a>(&mut self, a: <a class="primitive" href="https://doc.rust-lang.org/1.85.0/std/primitive.usize.html">usize</a>, b: <a class="primitive" href="https://doc.rust-lang.org/1.85.0/std/primitive.usize.html">usize</a>)</h4></section></summary><div class="docblock"><p>Swaps two elements in the slice.</p>
<p>If <code>a</code> equals to <code>b</code>, it’s guaranteed that elements won’t change value.</p>
<h5 id="arguments"><a class="doc-anchor" href="#arguments">§</a>Arguments</h5>
<ul>
<li>a - The index of the first element</li>
<li>b - The index of the second element</li>
</ul>
<h5 id="panics"><a class="doc-anchor" href="#panics">§</a>Panics</h5>
<p>Panics if <code>a</code> or <code>b</code> are out of bounds.</p>
<h5 id="examples-28"><a class="doc-anchor" href="#examples-28">§</a>Examples</h5>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span><span class="kw-2">mut </span>v = [<span class="string">"a"</span>, <span class="string">"b"</span>, <span class="string">"c"</span>, <span class="string">"d"</span>, <span class="string">"e"</span>];
v.swap(<span class="number">2</span>, <span class="number">4</span>);
<span class="macro">assert!</span>(v == [<span class="string">"a"</span>, <span class="string">"b"</span>, <span class="string">"e"</span>, <span class="string">"d"</span>, <span class="string">"c"</span>]);</code></pre></div>
</div></details><details class="toggle method-toggle" open><summary><section id="method.swap_unchecked" class="method"><a class="src rightside" href="https://doc.rust-lang.org/1.85.0/src/core/slice/mod.rs.html#962">Source</a><h4 class="code-header">pub unsafe fn <a href="#method.swap_unchecked" class="fn">swap_unchecked</a>(&mut self, a: <a class="primitive" href="https://doc.rust-lang.org/1.85.0/std/primitive.usize.html">usize</a>, b: <a class="primitive" href="https://doc.rust-lang.org/1.85.0/std/primitive.usize.html">usize</a>)</h4></section><span class="item-info"><div class="stab unstable"><span class="emoji">🔬</span><span>This is a nightly-only experimental API. (<code>slice_swap_unchecked</code>)</span></div></span></summary><div class="docblock"><p>Swaps two elements in the slice, without doing bounds checking.</p>
<p>For a safe alternative see <a href="https://doc.rust-lang.org/1.85.0/std/primitive.slice.html#method.swap" title="method slice::swap"><code>swap</code></a>.</p>
<h5 id="arguments-1"><a class="doc-anchor" href="#arguments-1">§</a>Arguments</h5>
<ul>
<li>a - The index of the first element</li>
<li>b - The index of the second element</li>
</ul>
<h5 id="safety-3"><a class="doc-anchor" href="#safety-3">§</a>Safety</h5>
<p>Calling this method with an out-of-bounds index is <em><a href="https://doc.rust-lang.org/reference/behavior-considered-undefined.html">undefined behavior</a></em>.
The caller has to ensure that <code>a < self.len()</code> and <code>b < self.len()</code>.</p>
<h5 id="examples-29"><a class="doc-anchor" href="#examples-29">§</a>Examples</h5>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="attr">#![feature(slice_swap_unchecked)]
</span><span class="kw">let </span><span class="kw-2">mut </span>v = [<span class="string">"a"</span>, <span class="string">"b"</span>, <span class="string">"c"</span>, <span class="string">"d"</span>];
<span class="comment">// SAFETY: we know that 1 and 3 are both indices of the slice
</span><span class="kw">unsafe </span>{ v.swap_unchecked(<span class="number">1</span>, <span class="number">3</span>) };
<span class="macro">assert!</span>(v == [<span class="string">"a"</span>, <span class="string">"d"</span>, <span class="string">"c"</span>, <span class="string">"b"</span>]);</code></pre></div>
</div></details><details class="toggle method-toggle" open><summary><section id="method.reverse" class="method"><span class="rightside"><span class="since" title="Stable since Rust version 1.0.0">1.0.0</span> · <a class="src" href="https://doc.rust-lang.org/1.85.0/src/core/slice/mod.rs.html#991">Source</a></span><h4 class="code-header">pub fn <a href="#method.reverse" class="fn">reverse</a>(&mut self)</h4></section></summary><div class="docblock"><p>Reverses the order of elements in the slice, in place.</p>
<h5 id="examples-30"><a class="doc-anchor" href="#examples-30">§</a>Examples</h5>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span><span class="kw-2">mut </span>v = [<span class="number">1</span>, <span class="number">2</span>, <span class="number">3</span>];
v.reverse();
<span class="macro">assert!</span>(v == [<span class="number">3</span>, <span class="number">2</span>, <span class="number">1</span>]);</code></pre></div>
</div></details><details class="toggle method-toggle" open><summary><section id="method.iter" class="method"><span class="rightside"><span class="since" title="Stable since Rust version 1.0.0">1.0.0</span> · <a class="src" href="https://doc.rust-lang.org/1.85.0/src/core/slice/mod.rs.html#1050">Source</a></span><h4 class="code-header">pub fn <a href="#method.iter" class="fn">iter</a>(&self) -> <a class="struct" href="https://doc.rust-lang.org/1.85.0/core/slice/iter/struct.Iter.html" title="struct core::slice::iter::Iter">Iter</a><'_, T></h4></section></summary><div class="docblock"><p>Returns an iterator over the slice.</p>
<p>The iterator yields all items from start to end.</p>
<h5 id="examples-31"><a class="doc-anchor" href="#examples-31">§</a>Examples</h5>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>x = <span class="kw-2">&</span>[<span class="number">1</span>, <span class="number">2</span>, <span class="number">4</span>];
<span class="kw">let </span><span class="kw-2">mut </span>iterator = x.iter();
<span class="macro">assert_eq!</span>(iterator.next(), <span class="prelude-val">Some</span>(<span class="kw-2">&</span><span class="number">1</span>));
<span class="macro">assert_eq!</span>(iterator.next(), <span class="prelude-val">Some</span>(<span class="kw-2">&</span><span class="number">2</span>));
<span class="macro">assert_eq!</span>(iterator.next(), <span class="prelude-val">Some</span>(<span class="kw-2">&</span><span class="number">4</span>));
<span class="macro">assert_eq!</span>(iterator.next(), <span class="prelude-val">None</span>);</code></pre></div>
</div></details><details class="toggle method-toggle" open><summary><section id="method.iter_mut" class="method"><span class="rightside"><span class="since" title="Stable since Rust version 1.0.0">1.0.0</span> · <a class="src" href="https://doc.rust-lang.org/1.85.0/src/core/slice/mod.rs.html#1069">Source</a></span><h4 class="code-header">pub fn <a href="#method.iter_mut" class="fn">iter_mut</a>(&mut self) -> <a class="struct" href="https://doc.rust-lang.org/1.85.0/core/slice/iter/struct.IterMut.html" title="struct core::slice::iter::IterMut">IterMut</a><'_, T></h4></section></summary><div class="docblock"><p>Returns an iterator that allows modifying each value.</p>
<p>The iterator yields all items from start to end.</p>
<h5 id="examples-32"><a class="doc-anchor" href="#examples-32">§</a>Examples</h5>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>x = <span class="kw-2">&mut </span>[<span class="number">1</span>, <span class="number">2</span>, <span class="number">4</span>];
<span class="kw">for </span>elem <span class="kw">in </span>x.iter_mut() {
<span class="kw-2">*</span>elem += <span class="number">2</span>;
}
<span class="macro">assert_eq!</span>(x, <span class="kw-2">&</span>[<span class="number">3</span>, <span class="number">4</span>, <span class="number">6</span>]);</code></pre></div>
</div></details><details class="toggle method-toggle" open><summary><section id="method.windows" class="method"><span class="rightside"><span class="since" title="Stable since Rust version 1.0.0">1.0.0</span> · <a class="src" href="https://doc.rust-lang.org/1.85.0/src/core/slice/mod.rs.html#1118">Source</a></span><h4 class="code-header">pub fn <a href="#method.windows" class="fn">windows</a>(&self, size: <a class="primitive" href="https://doc.rust-lang.org/1.85.0/std/primitive.usize.html">usize</a>) -> <a class="struct" href="https://doc.rust-lang.org/1.85.0/core/slice/iter/struct.Windows.html" title="struct core::slice::iter::Windows">Windows</a><'_, T></h4></section></summary><div class="docblock"><p>Returns an iterator over all contiguous windows of length
<code>size</code>. The windows overlap. If the slice is shorter than
<code>size</code>, the iterator returns no values.</p>
<h5 id="panics-1"><a class="doc-anchor" href="#panics-1">§</a>Panics</h5>
<p>Panics if <code>size</code> is zero.</p>
<h5 id="examples-33"><a class="doc-anchor" href="#examples-33">§</a>Examples</h5>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>slice = [<span class="string">'l'</span>, <span class="string">'o'</span>, <span class="string">'r'</span>, <span class="string">'e'</span>, <span class="string">'m'</span>];
<span class="kw">let </span><span class="kw-2">mut </span>iter = slice.windows(<span class="number">3</span>);
<span class="macro">assert_eq!</span>(iter.next().unwrap(), <span class="kw-2">&</span>[<span class="string">'l'</span>, <span class="string">'o'</span>, <span class="string">'r'</span>]);
<span class="macro">assert_eq!</span>(iter.next().unwrap(), <span class="kw-2">&</span>[<span class="string">'o'</span>, <span class="string">'r'</span>, <span class="string">'e'</span>]);
<span class="macro">assert_eq!</span>(iter.next().unwrap(), <span class="kw-2">&</span>[<span class="string">'r'</span>, <span class="string">'e'</span>, <span class="string">'m'</span>]);
<span class="macro">assert!</span>(iter.next().is_none());</code></pre></div>
<p>If the slice is shorter than <code>size</code>:</p>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>slice = [<span class="string">'f'</span>, <span class="string">'o'</span>, <span class="string">'o'</span>];
<span class="kw">let </span><span class="kw-2">mut </span>iter = slice.windows(<span class="number">4</span>);
<span class="macro">assert!</span>(iter.next().is_none());</code></pre></div>
<p>There’s no <code>windows_mut</code>, as that existing would let safe code violate the
“only one <code>&mut</code> at a time to the same thing” rule. However, you can sometimes
use <a href="https://doc.rust-lang.org/1.85.0/core/cell/struct.Cell.html#method.as_slice_of_cells" title="method core::cell::Cell::as_slice_of_cells"><code>Cell::as_slice_of_cells</code></a> in
conjunction with <code>windows</code> to accomplish something similar:</p>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>std::cell::Cell;
<span class="kw">let </span><span class="kw-2">mut </span>array = [<span class="string">'R'</span>, <span class="string">'u'</span>, <span class="string">'s'</span>, <span class="string">'t'</span>, <span class="string">' '</span>, <span class="string">'2'</span>, <span class="string">'0'</span>, <span class="string">'1'</span>, <span class="string">'5'</span>];
<span class="kw">let </span>slice = <span class="kw-2">&mut </span>array[..];
<span class="kw">let </span>slice_of_cells: <span class="kw-2">&</span>[Cell<char>] = Cell::from_mut(slice).as_slice_of_cells();
<span class="kw">for </span>w <span class="kw">in </span>slice_of_cells.windows(<span class="number">3</span>) {
Cell::swap(<span class="kw-2">&</span>w[<span class="number">0</span>], <span class="kw-2">&</span>w[<span class="number">2</span>]);
}
<span class="macro">assert_eq!</span>(array, [<span class="string">'s'</span>, <span class="string">'t'</span>, <span class="string">' '</span>, <span class="string">'2'</span>, <span class="string">'0'</span>, <span class="string">'1'</span>, <span class="string">'5'</span>, <span class="string">'u'</span>, <span class="string">'R'</span>]);</code></pre></div>
</div></details><details class="toggle method-toggle" open><summary><section id="method.chunks" class="method"><span class="rightside"><span class="since" title="Stable since Rust version 1.0.0">1.0.0</span> · <a class="src" href="https://doc.rust-lang.org/1.85.0/src/core/slice/mod.rs.html#1153">Source</a></span><h4 class="code-header">pub fn <a href="#method.chunks" class="fn">chunks</a>(&self, chunk_size: <a class="primitive" href="https://doc.rust-lang.org/1.85.0/std/primitive.usize.html">usize</a>) -> <a class="struct" href="https://doc.rust-lang.org/1.85.0/core/slice/iter/struct.Chunks.html" title="struct core::slice::iter::Chunks">Chunks</a><'_, T></h4></section></summary><div class="docblock"><p>Returns an iterator over <code>chunk_size</code> elements of the slice at a time, starting at the
beginning of the slice.</p>
<p>The chunks are slices and do not overlap. If <code>chunk_size</code> does not divide the length of the
slice, then the last chunk will not have length <code>chunk_size</code>.</p>
<p>See <a href="https://doc.rust-lang.org/1.85.0/std/primitive.slice.html#method.chunks_exact" title="method slice::chunks_exact"><code>chunks_exact</code></a> for a variant of this iterator that returns chunks of always exactly
<code>chunk_size</code> elements, and <a href="https://doc.rust-lang.org/1.85.0/std/primitive.slice.html#method.rchunks" title="method slice::rchunks"><code>rchunks</code></a> for the same iterator but starting at the end of the
slice.</p>
<h5 id="panics-2"><a class="doc-anchor" href="#panics-2">§</a>Panics</h5>
<p>Panics if <code>chunk_size</code> is zero.</p>
<h5 id="examples-34"><a class="doc-anchor" href="#examples-34">§</a>Examples</h5>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>slice = [<span class="string">'l'</span>, <span class="string">'o'</span>, <span class="string">'r'</span>, <span class="string">'e'</span>, <span class="string">'m'</span>];
<span class="kw">let </span><span class="kw-2">mut </span>iter = slice.chunks(<span class="number">2</span>);
<span class="macro">assert_eq!</span>(iter.next().unwrap(), <span class="kw-2">&</span>[<span class="string">'l'</span>, <span class="string">'o'</span>]);
<span class="macro">assert_eq!</span>(iter.next().unwrap(), <span class="kw-2">&</span>[<span class="string">'r'</span>, <span class="string">'e'</span>]);
<span class="macro">assert_eq!</span>(iter.next().unwrap(), <span class="kw-2">&</span>[<span class="string">'m'</span>]);
<span class="macro">assert!</span>(iter.next().is_none());</code></pre></div>
</div></details><details class="toggle method-toggle" open><summary><section id="method.chunks_mut" class="method"><span class="rightside"><span class="since" title="Stable since Rust version 1.0.0">1.0.0</span> · <a class="src" href="https://doc.rust-lang.org/1.85.0/src/core/slice/mod.rs.html#1192">Source</a></span><h4 class="code-header">pub fn <a href="#method.chunks_mut" class="fn">chunks_mut</a>(&mut self, chunk_size: <a class="primitive" href="https://doc.rust-lang.org/1.85.0/std/primitive.usize.html">usize</a>) -> <a class="struct" href="https://doc.rust-lang.org/1.85.0/core/slice/iter/struct.ChunksMut.html" title="struct core::slice::iter::ChunksMut">ChunksMut</a><'_, T></h4></section></summary><div class="docblock"><p>Returns an iterator over <code>chunk_size</code> elements of the slice at a time, starting at the
beginning of the slice.</p>
<p>The chunks are mutable slices, and do not overlap. If <code>chunk_size</code> does not divide the
length of the slice, then the last chunk will not have length <code>chunk_size</code>.</p>
<p>See <a href="https://doc.rust-lang.org/1.85.0/std/primitive.slice.html#method.chunks_exact_mut" title="method slice::chunks_exact_mut"><code>chunks_exact_mut</code></a> for a variant of this iterator that returns chunks of always
exactly <code>chunk_size</code> elements, and <a href="https://doc.rust-lang.org/1.85.0/std/primitive.slice.html#method.rchunks_mut" title="method slice::rchunks_mut"><code>rchunks_mut</code></a> for the same iterator but starting at
the end of the slice.</p>
<h5 id="panics-3"><a class="doc-anchor" href="#panics-3">§</a>Panics</h5>
<p>Panics if <code>chunk_size</code> is zero.</p>
<h5 id="examples-35"><a class="doc-anchor" href="#examples-35">§</a>Examples</h5>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>v = <span class="kw-2">&mut </span>[<span class="number">0</span>, <span class="number">0</span>, <span class="number">0</span>, <span class="number">0</span>, <span class="number">0</span>];
<span class="kw">let </span><span class="kw-2">mut </span>count = <span class="number">1</span>;
<span class="kw">for </span>chunk <span class="kw">in </span>v.chunks_mut(<span class="number">2</span>) {
<span class="kw">for </span>elem <span class="kw">in </span>chunk.iter_mut() {
<span class="kw-2">*</span>elem += count;
}
count += <span class="number">1</span>;
}
<span class="macro">assert_eq!</span>(v, <span class="kw-2">&</span>[<span class="number">1</span>, <span class="number">1</span>, <span class="number">2</span>, <span class="number">2</span>, <span class="number">3</span>]);</code></pre></div>
</div></details><details class="toggle method-toggle" open><summary><section id="method.chunks_exact" class="method"><span class="rightside"><span class="since" title="Stable since Rust version 1.31.0">1.31.0</span> · <a class="src" href="https://doc.rust-lang.org/1.85.0/src/core/slice/mod.rs.html#1230">Source</a></span><h4 class="code-header">pub fn <a href="#method.chunks_exact" class="fn">chunks_exact</a>(&self, chunk_size: <a class="primitive" href="https://doc.rust-lang.org/1.85.0/std/primitive.usize.html">usize</a>) -> <a class="struct" href="https://doc.rust-lang.org/1.85.0/core/slice/iter/struct.ChunksExact.html" title="struct core::slice::iter::ChunksExact">ChunksExact</a><'_, T></h4></section></summary><div class="docblock"><p>Returns an iterator over <code>chunk_size</code> elements of the slice at a time, starting at the
beginning of the slice.</p>
<p>The chunks are slices and do not overlap. If <code>chunk_size</code> does not divide the length of the
slice, then the last up to <code>chunk_size-1</code> elements will be omitted and can be retrieved
from the <code>remainder</code> function of the iterator.</p>
<p>Due to each chunk having exactly <code>chunk_size</code> elements, the compiler can often optimize the
resulting code better than in the case of <a href="https://doc.rust-lang.org/1.85.0/std/primitive.slice.html#method.chunks" title="method slice::chunks"><code>chunks</code></a>.</p>
<p>See <a href="https://doc.rust-lang.org/1.85.0/std/primitive.slice.html#method.chunks" title="method slice::chunks"><code>chunks</code></a> for a variant of this iterator that also returns the remainder as a smaller
chunk, and <a href="https://doc.rust-lang.org/1.85.0/std/primitive.slice.html#method.rchunks_exact" title="method slice::rchunks_exact"><code>rchunks_exact</code></a> for the same iterator but starting at the end of the slice.</p>
<h5 id="panics-4"><a class="doc-anchor" href="#panics-4">§</a>Panics</h5>
<p>Panics if <code>chunk_size</code> is zero.</p>
<h5 id="examples-36"><a class="doc-anchor" href="#examples-36">§</a>Examples</h5>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>slice = [<span class="string">'l'</span>, <span class="string">'o'</span>, <span class="string">'r'</span>, <span class="string">'e'</span>, <span class="string">'m'</span>];
<span class="kw">let </span><span class="kw-2">mut </span>iter = slice.chunks_exact(<span class="number">2</span>);
<span class="macro">assert_eq!</span>(iter.next().unwrap(), <span class="kw-2">&</span>[<span class="string">'l'</span>, <span class="string">'o'</span>]);
<span class="macro">assert_eq!</span>(iter.next().unwrap(), <span class="kw-2">&</span>[<span class="string">'r'</span>, <span class="string">'e'</span>]);
<span class="macro">assert!</span>(iter.next().is_none());
<span class="macro">assert_eq!</span>(iter.remainder(), <span class="kw-2">&</span>[<span class="string">'m'</span>]);</code></pre></div>
</div></details><details class="toggle method-toggle" open><summary><section id="method.chunks_exact_mut" class="method"><span class="rightside"><span class="since" title="Stable since Rust version 1.31.0">1.31.0</span> · <a class="src" href="https://doc.rust-lang.org/1.85.0/src/core/slice/mod.rs.html#1273">Source</a></span><h4 class="code-header">pub fn <a href="#method.chunks_exact_mut" class="fn">chunks_exact_mut</a>(&mut self, chunk_size: <a class="primitive" href="https://doc.rust-lang.org/1.85.0/std/primitive.usize.html">usize</a>) -> <a class="struct" href="https://doc.rust-lang.org/1.85.0/core/slice/iter/struct.ChunksExactMut.html" title="struct core::slice::iter::ChunksExactMut">ChunksExactMut</a><'_, T></h4></section></summary><div class="docblock"><p>Returns an iterator over <code>chunk_size</code> elements of the slice at a time, starting at the
beginning of the slice.</p>
<p>The chunks are mutable slices, and do not overlap. If <code>chunk_size</code> does not divide the
length of the slice, then the last up to <code>chunk_size-1</code> elements will be omitted and can be
retrieved from the <code>into_remainder</code> function of the iterator.</p>
<p>Due to each chunk having exactly <code>chunk_size</code> elements, the compiler can often optimize the
resulting code better than in the case of <a href="https://doc.rust-lang.org/1.85.0/std/primitive.slice.html#method.chunks_mut" title="method slice::chunks_mut"><code>chunks_mut</code></a>.</p>
<p>See <a href="https://doc.rust-lang.org/1.85.0/std/primitive.slice.html#method.chunks_mut" title="method slice::chunks_mut"><code>chunks_mut</code></a> for a variant of this iterator that also returns the remainder as a
smaller chunk, and <a href="https://doc.rust-lang.org/1.85.0/std/primitive.slice.html#method.rchunks_exact_mut" title="method slice::rchunks_exact_mut"><code>rchunks_exact_mut</code></a> for the same iterator but starting at the end of
the slice.</p>
<h5 id="panics-5"><a class="doc-anchor" href="#panics-5">§</a>Panics</h5>
<p>Panics if <code>chunk_size</code> is zero.</p>
<h5 id="examples-37"><a class="doc-anchor" href="#examples-37">§</a>Examples</h5>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>v = <span class="kw-2">&mut </span>[<span class="number">0</span>, <span class="number">0</span>, <span class="number">0</span>, <span class="number">0</span>, <span class="number">0</span>];
<span class="kw">let </span><span class="kw-2">mut </span>count = <span class="number">1</span>;
<span class="kw">for </span>chunk <span class="kw">in </span>v.chunks_exact_mut(<span class="number">2</span>) {
<span class="kw">for </span>elem <span class="kw">in </span>chunk.iter_mut() {
<span class="kw-2">*</span>elem += count;
}
count += <span class="number">1</span>;
}
<span class="macro">assert_eq!</span>(v, <span class="kw-2">&</span>[<span class="number">1</span>, <span class="number">1</span>, <span class="number">2</span>, <span class="number">2</span>, <span class="number">0</span>]);</code></pre></div>
</div></details><details class="toggle method-toggle" open><summary><section id="method.as_chunks_unchecked" class="method"><a class="src rightside" href="https://doc.rust-lang.org/1.85.0/src/core/slice/mod.rs.html#1309">Source</a><h4 class="code-header">pub unsafe fn <a href="#method.as_chunks_unchecked" class="fn">as_chunks_unchecked</a><const N: <a class="primitive" href="https://doc.rust-lang.org/1.85.0/std/primitive.usize.html">usize</a>>(&self) -> &[<a class="primitive" href="https://doc.rust-lang.org/1.85.0/std/primitive.array.html">[T; N]</a>]</h4></section><span class="item-info"><div class="stab unstable"><span class="emoji">🔬</span><span>This is a nightly-only experimental API. (<code>slice_as_chunks</code>)</span></div></span></summary><div class="docblock"><p>Splits the slice into a slice of <code>N</code>-element arrays,
assuming that there’s no remainder.</p>
<h5 id="safety-4"><a class="doc-anchor" href="#safety-4">§</a>Safety</h5>
<p>This may only be called when</p>
<ul>
<li>The slice splits exactly into <code>N</code>-element chunks (aka <code>self.len() % N == 0</code>).</li>
<li><code>N != 0</code>.</li>
</ul>
<h5 id="examples-38"><a class="doc-anchor" href="#examples-38">§</a>Examples</h5>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="attr">#![feature(slice_as_chunks)]
</span><span class="kw">let </span>slice: <span class="kw-2">&</span>[char] = <span class="kw-2">&</span>[<span class="string">'l'</span>, <span class="string">'o'</span>, <span class="string">'r'</span>, <span class="string">'e'</span>, <span class="string">'m'</span>, <span class="string">'!'</span>];
<span class="kw">let </span>chunks: <span class="kw-2">&</span>[[char; <span class="number">1</span>]] =
<span class="comment">// SAFETY: 1-element chunks never have remainder
</span><span class="kw">unsafe </span>{ slice.as_chunks_unchecked() };
<span class="macro">assert_eq!</span>(chunks, <span class="kw-2">&</span>[[<span class="string">'l'</span>], [<span class="string">'o'</span>], [<span class="string">'r'</span>], [<span class="string">'e'</span>], [<span class="string">'m'</span>], [<span class="string">'!'</span>]]);
<span class="kw">let </span>chunks: <span class="kw-2">&</span>[[char; <span class="number">3</span>]] =
<span class="comment">// SAFETY: The slice length (6) is a multiple of 3
</span><span class="kw">unsafe </span>{ slice.as_chunks_unchecked() };
<span class="macro">assert_eq!</span>(chunks, <span class="kw-2">&</span>[[<span class="string">'l'</span>, <span class="string">'o'</span>, <span class="string">'r'</span>], [<span class="string">'e'</span>, <span class="string">'m'</span>, <span class="string">'!'</span>]]);
<span class="comment">// These would be unsound:
// let chunks: &[[_; 5]] = slice.as_chunks_unchecked() // The slice length is not a multiple of 5
// let chunks: &[[_; 0]] = slice.as_chunks_unchecked() // Zero-length chunks are never allowed</span></code></pre></div>
</div></details><details class="toggle method-toggle" open><summary><section id="method.as_chunks" class="method"><a class="src rightside" href="https://doc.rust-lang.org/1.85.0/src/core/slice/mod.rs.html#1356">Source</a><h4 class="code-header">pub fn <a href="#method.as_chunks" class="fn">as_chunks</a><const N: <a class="primitive" href="https://doc.rust-lang.org/1.85.0/std/primitive.usize.html">usize</a>>(&self) -> (&[<a class="primitive" href="https://doc.rust-lang.org/1.85.0/std/primitive.array.html">[T; N]</a>], &<a class="primitive" href="https://doc.rust-lang.org/1.85.0/std/primitive.slice.html">[T]</a>)</h4></section><span class="item-info"><div class="stab unstable"><span class="emoji">🔬</span><span>This is a nightly-only experimental API. (<code>slice_as_chunks</code>)</span></div></span></summary><div class="docblock"><p>Splits the slice into a slice of <code>N</code>-element arrays,
starting at the beginning of the slice,
and a remainder slice with length strictly less than <code>N</code>.</p>
<h5 id="panics-6"><a class="doc-anchor" href="#panics-6">§</a>Panics</h5>
<p>Panics if <code>N</code> is zero. This check will most probably get changed to a compile time
error before this method gets stabilized.</p>
<h5 id="examples-39"><a class="doc-anchor" href="#examples-39">§</a>Examples</h5>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="attr">#![feature(slice_as_chunks)]
</span><span class="kw">let </span>slice = [<span class="string">'l'</span>, <span class="string">'o'</span>, <span class="string">'r'</span>, <span class="string">'e'</span>, <span class="string">'m'</span>];
<span class="kw">let </span>(chunks, remainder) = slice.as_chunks();
<span class="macro">assert_eq!</span>(chunks, <span class="kw-2">&</span>[[<span class="string">'l'</span>, <span class="string">'o'</span>], [<span class="string">'r'</span>, <span class="string">'e'</span>]]);
<span class="macro">assert_eq!</span>(remainder, <span class="kw-2">&</span>[<span class="string">'m'</span>]);</code></pre></div>
<p>If you expect the slice to be an exact multiple, you can combine
<code>let</code>-<code>else</code> with an empty slice pattern:</p>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="attr">#![feature(slice_as_chunks)]
</span><span class="kw">let </span>slice = [<span class="string">'R'</span>, <span class="string">'u'</span>, <span class="string">'s'</span>, <span class="string">'t'</span>];
<span class="kw">let </span>(chunks, []) = slice.as_chunks::<<span class="number">2</span>>() <span class="kw">else </span>{
<span class="macro">panic!</span>(<span class="string">"slice didn't have even length"</span>)
};
<span class="macro">assert_eq!</span>(chunks, <span class="kw-2">&</span>[[<span class="string">'R'</span>, <span class="string">'u'</span>], [<span class="string">'s'</span>, <span class="string">'t'</span>]]);</code></pre></div>
</div></details><details class="toggle method-toggle" open><summary><section id="method.as_rchunks" class="method"><a class="src rightside" href="https://doc.rust-lang.org/1.85.0/src/core/slice/mod.rs.html#1391">Source</a><h4 class="code-header">pub fn <a href="#method.as_rchunks" class="fn">as_rchunks</a><const N: <a class="primitive" href="https://doc.rust-lang.org/1.85.0/std/primitive.usize.html">usize</a>>(&self) -> (&<a class="primitive" href="https://doc.rust-lang.org/1.85.0/std/primitive.slice.html">[T]</a>, &[<a class="primitive" href="https://doc.rust-lang.org/1.85.0/std/primitive.array.html">[T; N]</a>])</h4></section><span class="item-info"><div class="stab unstable"><span class="emoji">🔬</span><span>This is a nightly-only experimental API. (<code>slice_as_chunks</code>)</span></div></span></summary><div class="docblock"><p>Splits the slice into a slice of <code>N</code>-element arrays,
starting at the end of the slice,
and a remainder slice with length strictly less than <code>N</code>.</p>
<h5 id="panics-7"><a class="doc-anchor" href="#panics-7">§</a>Panics</h5>
<p>Panics if <code>N</code> is zero. This check will most probably get changed to a compile time
error before this method gets stabilized.</p>
<h5 id="examples-40"><a class="doc-anchor" href="#examples-40">§</a>Examples</h5>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="attr">#![feature(slice_as_chunks)]
</span><span class="kw">let </span>slice = [<span class="string">'l'</span>, <span class="string">'o'</span>, <span class="string">'r'</span>, <span class="string">'e'</span>, <span class="string">'m'</span>];
<span class="kw">let </span>(remainder, chunks) = slice.as_rchunks();
<span class="macro">assert_eq!</span>(remainder, <span class="kw-2">&</span>[<span class="string">'l'</span>]);
<span class="macro">assert_eq!</span>(chunks, <span class="kw-2">&</span>[[<span class="string">'o'</span>, <span class="string">'r'</span>], [<span class="string">'e'</span>, <span class="string">'m'</span>]]);</code></pre></div>
</div></details><details class="toggle method-toggle" open><summary><section id="method.array_chunks" class="method"><a class="src rightside" href="https://doc.rust-lang.org/1.85.0/src/core/slice/mod.rs.html#1431">Source</a><h4 class="code-header">pub fn <a href="#method.array_chunks" class="fn">array_chunks</a><const N: <a class="primitive" href="https://doc.rust-lang.org/1.85.0/std/primitive.usize.html">usize</a>>(&self) -> <a class="struct" href="https://doc.rust-lang.org/1.85.0/core/slice/iter/struct.ArrayChunks.html" title="struct core::slice::iter::ArrayChunks">ArrayChunks</a><'_, T, N></h4></section><span class="item-info"><div class="stab unstable"><span class="emoji">🔬</span><span>This is a nightly-only experimental API. (<code>array_chunks</code>)</span></div></span></summary><div class="docblock"><p>Returns an iterator over <code>N</code> elements of the slice at a time, starting at the
beginning of the slice.</p>
<p>The chunks are array references and do not overlap. If <code>N</code> does not divide the
length of the slice, then the last up to <code>N-1</code> elements will be omitted and can be
retrieved from the <code>remainder</code> function of the iterator.</p>
<p>This method is the const generic equivalent of <a href="https://doc.rust-lang.org/1.85.0/std/primitive.slice.html#method.chunks_exact" title="method slice::chunks_exact"><code>chunks_exact</code></a>.</p>
<h5 id="panics-8"><a class="doc-anchor" href="#panics-8">§</a>Panics</h5>
<p>Panics if <code>N</code> is zero. This check will most probably get changed to a compile time
error before this method gets stabilized.</p>
<h5 id="examples-41"><a class="doc-anchor" href="#examples-41">§</a>Examples</h5>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="attr">#![feature(array_chunks)]
</span><span class="kw">let </span>slice = [<span class="string">'l'</span>, <span class="string">'o'</span>, <span class="string">'r'</span>, <span class="string">'e'</span>, <span class="string">'m'</span>];
<span class="kw">let </span><span class="kw-2">mut </span>iter = slice.array_chunks();
<span class="macro">assert_eq!</span>(iter.next().unwrap(), <span class="kw-2">&</span>[<span class="string">'l'</span>, <span class="string">'o'</span>]);
<span class="macro">assert_eq!</span>(iter.next().unwrap(), <span class="kw-2">&</span>[<span class="string">'r'</span>, <span class="string">'e'</span>]);
<span class="macro">assert!</span>(iter.next().is_none());
<span class="macro">assert_eq!</span>(iter.remainder(), <span class="kw-2">&</span>[<span class="string">'m'</span>]);</code></pre></div>
</div></details><details class="toggle method-toggle" open><summary><section id="method.as_chunks_unchecked_mut" class="method"><a class="src rightside" href="https://doc.rust-lang.org/1.85.0/src/core/slice/mod.rs.html#1469">Source</a><h4 class="code-header">pub unsafe fn <a href="#method.as_chunks_unchecked_mut" class="fn">as_chunks_unchecked_mut</a><const N: <a class="primitive" href="https://doc.rust-lang.org/1.85.0/std/primitive.usize.html">usize</a>>(
&mut self,
) -> &mut [<a class="primitive" href="https://doc.rust-lang.org/1.85.0/std/primitive.array.html">[T; N]</a>]</h4></section><span class="item-info"><div class="stab unstable"><span class="emoji">🔬</span><span>This is a nightly-only experimental API. (<code>slice_as_chunks</code>)</span></div></span></summary><div class="docblock"><p>Splits the slice into a slice of <code>N</code>-element arrays,
assuming that there’s no remainder.</p>
<h5 id="safety-5"><a class="doc-anchor" href="#safety-5">§</a>Safety</h5>
<p>This may only be called when</p>
<ul>
<li>The slice splits exactly into <code>N</code>-element chunks (aka <code>self.len() % N == 0</code>).</li>
<li><code>N != 0</code>.</li>
</ul>
<h5 id="examples-42"><a class="doc-anchor" href="#examples-42">§</a>Examples</h5>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="attr">#![feature(slice_as_chunks)]
</span><span class="kw">let </span>slice: <span class="kw-2">&mut </span>[char] = <span class="kw-2">&mut </span>[<span class="string">'l'</span>, <span class="string">'o'</span>, <span class="string">'r'</span>, <span class="string">'e'</span>, <span class="string">'m'</span>, <span class="string">'!'</span>];
<span class="kw">let </span>chunks: <span class="kw-2">&mut </span>[[char; <span class="number">1</span>]] =
<span class="comment">// SAFETY: 1-element chunks never have remainder
</span><span class="kw">unsafe </span>{ slice.as_chunks_unchecked_mut() };
chunks[<span class="number">0</span>] = [<span class="string">'L'</span>];
<span class="macro">assert_eq!</span>(chunks, <span class="kw-2">&</span>[[<span class="string">'L'</span>], [<span class="string">'o'</span>], [<span class="string">'r'</span>], [<span class="string">'e'</span>], [<span class="string">'m'</span>], [<span class="string">'!'</span>]]);
<span class="kw">let </span>chunks: <span class="kw-2">&mut </span>[[char; <span class="number">3</span>]] =
<span class="comment">// SAFETY: The slice length (6) is a multiple of 3
</span><span class="kw">unsafe </span>{ slice.as_chunks_unchecked_mut() };
chunks[<span class="number">1</span>] = [<span class="string">'a'</span>, <span class="string">'x'</span>, <span class="string">'?'</span>];
<span class="macro">assert_eq!</span>(slice, <span class="kw-2">&</span>[<span class="string">'L'</span>, <span class="string">'o'</span>, <span class="string">'r'</span>, <span class="string">'a'</span>, <span class="string">'x'</span>, <span class="string">'?'</span>]);
<span class="comment">// These would be unsound:
// let chunks: &[[_; 5]] = slice.as_chunks_unchecked_mut() // The slice length is not a multiple of 5
// let chunks: &[[_; 0]] = slice.as_chunks_unchecked_mut() // Zero-length chunks are never allowed</span></code></pre></div>
</div></details><details class="toggle method-toggle" open><summary><section id="method.as_chunks_mut" class="method"><a class="src rightside" href="https://doc.rust-lang.org/1.85.0/src/core/slice/mod.rs.html#1511">Source</a><h4 class="code-header">pub fn <a href="#method.as_chunks_mut" class="fn">as_chunks_mut</a><const N: <a class="primitive" href="https://doc.rust-lang.org/1.85.0/std/primitive.usize.html">usize</a>>(&mut self) -> (&mut [<a class="primitive" href="https://doc.rust-lang.org/1.85.0/std/primitive.array.html">[T; N]</a>], &mut <a class="primitive" href="https://doc.rust-lang.org/1.85.0/std/primitive.slice.html">[T]</a>)</h4></section><span class="item-info"><div class="stab unstable"><span class="emoji">🔬</span><span>This is a nightly-only experimental API. (<code>slice_as_chunks</code>)</span></div></span></summary><div class="docblock"><p>Splits the slice into a slice of <code>N</code>-element arrays,
starting at the beginning of the slice,
and a remainder slice with length strictly less than <code>N</code>.</p>
<h5 id="panics-9"><a class="doc-anchor" href="#panics-9">§</a>Panics</h5>
<p>Panics if <code>N</code> is zero. This check will most probably get changed to a compile time
error before this method gets stabilized.</p>
<h5 id="examples-43"><a class="doc-anchor" href="#examples-43">§</a>Examples</h5>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="attr">#![feature(slice_as_chunks)]
</span><span class="kw">let </span>v = <span class="kw-2">&mut </span>[<span class="number">0</span>, <span class="number">0</span>, <span class="number">0</span>, <span class="number">0</span>, <span class="number">0</span>];
<span class="kw">let </span><span class="kw-2">mut </span>count = <span class="number">1</span>;
<span class="kw">let </span>(chunks, remainder) = v.as_chunks_mut();
remainder[<span class="number">0</span>] = <span class="number">9</span>;
<span class="kw">for </span>chunk <span class="kw">in </span>chunks {
<span class="kw-2">*</span>chunk = [count; <span class="number">2</span>];
count += <span class="number">1</span>;
}
<span class="macro">assert_eq!</span>(v, <span class="kw-2">&</span>[<span class="number">1</span>, <span class="number">1</span>, <span class="number">2</span>, <span class="number">2</span>, <span class="number">9</span>]);</code></pre></div>
</div></details><details class="toggle method-toggle" open><summary><section id="method.as_rchunks_mut" class="method"><a class="src rightside" href="https://doc.rust-lang.org/1.85.0/src/core/slice/mod.rs.html#1552">Source</a><h4 class="code-header">pub fn <a href="#method.as_rchunks_mut" class="fn">as_rchunks_mut</a><const N: <a class="primitive" href="https://doc.rust-lang.org/1.85.0/std/primitive.usize.html">usize</a>>(&mut self) -> (&mut <a class="primitive" href="https://doc.rust-lang.org/1.85.0/std/primitive.slice.html">[T]</a>, &mut [<a class="primitive" href="https://doc.rust-lang.org/1.85.0/std/primitive.array.html">[T; N]</a>])</h4></section><span class="item-info"><div class="stab unstable"><span class="emoji">🔬</span><span>This is a nightly-only experimental API. (<code>slice_as_chunks</code>)</span></div></span></summary><div class="docblock"><p>Splits the slice into a slice of <code>N</code>-element arrays,
starting at the end of the slice,
and a remainder slice with length strictly less than <code>N</code>.</p>
<h5 id="panics-10"><a class="doc-anchor" href="#panics-10">§</a>Panics</h5>
<p>Panics if <code>N</code> is zero. This check will most probably get changed to a compile time
error before this method gets stabilized.</p>
<h5 id="examples-44"><a class="doc-anchor" href="#examples-44">§</a>Examples</h5>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="attr">#![feature(slice_as_chunks)]
</span><span class="kw">let </span>v = <span class="kw-2">&mut </span>[<span class="number">0</span>, <span class="number">0</span>, <span class="number">0</span>, <span class="number">0</span>, <span class="number">0</span>];
<span class="kw">let </span><span class="kw-2">mut </span>count = <span class="number">1</span>;
<span class="kw">let </span>(remainder, chunks) = v.as_rchunks_mut();
remainder[<span class="number">0</span>] = <span class="number">9</span>;
<span class="kw">for </span>chunk <span class="kw">in </span>chunks {
<span class="kw-2">*</span>chunk = [count; <span class="number">2</span>];
count += <span class="number">1</span>;
}
<span class="macro">assert_eq!</span>(v, <span class="kw-2">&</span>[<span class="number">9</span>, <span class="number">1</span>, <span class="number">1</span>, <span class="number">2</span>, <span class="number">2</span>]);</code></pre></div>
</div></details><details class="toggle method-toggle" open><summary><section id="method.array_chunks_mut" class="method"><a class="src rightside" href="https://doc.rust-lang.org/1.85.0/src/core/slice/mod.rs.html#1594">Source</a><h4 class="code-header">pub fn <a href="#method.array_chunks_mut" class="fn">array_chunks_mut</a><const N: <a class="primitive" href="https://doc.rust-lang.org/1.85.0/std/primitive.usize.html">usize</a>>(&mut self) -> <a class="struct" href="https://doc.rust-lang.org/1.85.0/core/slice/iter/struct.ArrayChunksMut.html" title="struct core::slice::iter::ArrayChunksMut">ArrayChunksMut</a><'_, T, N></h4></section><span class="item-info"><div class="stab unstable"><span class="emoji">🔬</span><span>This is a nightly-only experimental API. (<code>array_chunks</code>)</span></div></span></summary><div class="docblock"><p>Returns an iterator over <code>N</code> elements of the slice at a time, starting at the
beginning of the slice.</p>
<p>The chunks are mutable array references and do not overlap. If <code>N</code> does not divide
the length of the slice, then the last up to <code>N-1</code> elements will be omitted and
can be retrieved from the <code>into_remainder</code> function of the iterator.</p>
<p>This method is the const generic equivalent of <a href="https://doc.rust-lang.org/1.85.0/std/primitive.slice.html#method.chunks_exact_mut" title="method slice::chunks_exact_mut"><code>chunks_exact_mut</code></a>.</p>
<h5 id="panics-11"><a class="doc-anchor" href="#panics-11">§</a>Panics</h5>
<p>Panics if <code>N</code> is zero. This check will most probably get changed to a compile time
error before this method gets stabilized.</p>
<h5 id="examples-45"><a class="doc-anchor" href="#examples-45">§</a>Examples</h5>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="attr">#![feature(array_chunks)]
</span><span class="kw">let </span>v = <span class="kw-2">&mut </span>[<span class="number">0</span>, <span class="number">0</span>, <span class="number">0</span>, <span class="number">0</span>, <span class="number">0</span>];
<span class="kw">let </span><span class="kw-2">mut </span>count = <span class="number">1</span>;
<span class="kw">for </span>chunk <span class="kw">in </span>v.array_chunks_mut() {
<span class="kw-2">*</span>chunk = [count; <span class="number">2</span>];
count += <span class="number">1</span>;
}
<span class="macro">assert_eq!</span>(v, <span class="kw-2">&</span>[<span class="number">1</span>, <span class="number">1</span>, <span class="number">2</span>, <span class="number">2</span>, <span class="number">0</span>]);</code></pre></div>
</div></details><details class="toggle method-toggle" open><summary><section id="method.array_windows" class="method"><a class="src rightside" href="https://doc.rust-lang.org/1.85.0/src/core/slice/mod.rs.html#1627">Source</a><h4 class="code-header">pub fn <a href="#method.array_windows" class="fn">array_windows</a><const N: <a class="primitive" href="https://doc.rust-lang.org/1.85.0/std/primitive.usize.html">usize</a>>(&self) -> <a class="struct" href="https://doc.rust-lang.org/1.85.0/core/slice/iter/struct.ArrayWindows.html" title="struct core::slice::iter::ArrayWindows">ArrayWindows</a><'_, T, N></h4></section><span class="item-info"><div class="stab unstable"><span class="emoji">🔬</span><span>This is a nightly-only experimental API. (<code>array_windows</code>)</span></div></span></summary><div class="docblock"><p>Returns an iterator over overlapping windows of <code>N</code> elements of a slice,
starting at the beginning of the slice.</p>
<p>This is the const generic equivalent of <a href="https://doc.rust-lang.org/1.85.0/std/primitive.slice.html#method.windows" title="method slice::windows"><code>windows</code></a>.</p>
<p>If <code>N</code> is greater than the size of the slice, it will return no windows.</p>
<h5 id="panics-12"><a class="doc-anchor" href="#panics-12">§</a>Panics</h5>
<p>Panics if <code>N</code> is zero. This check will most probably get changed to a compile time
error before this method gets stabilized.</p>
<h5 id="examples-46"><a class="doc-anchor" href="#examples-46">§</a>Examples</h5>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="attr">#![feature(array_windows)]
</span><span class="kw">let </span>slice = [<span class="number">0</span>, <span class="number">1</span>, <span class="number">2</span>, <span class="number">3</span>];
<span class="kw">let </span><span class="kw-2">mut </span>iter = slice.array_windows();
<span class="macro">assert_eq!</span>(iter.next().unwrap(), <span class="kw-2">&</span>[<span class="number">0</span>, <span class="number">1</span>]);
<span class="macro">assert_eq!</span>(iter.next().unwrap(), <span class="kw-2">&</span>[<span class="number">1</span>, <span class="number">2</span>]);
<span class="macro">assert_eq!</span>(iter.next().unwrap(), <span class="kw-2">&</span>[<span class="number">2</span>, <span class="number">3</span>]);
<span class="macro">assert!</span>(iter.next().is_none());</code></pre></div>
</div></details><details class="toggle method-toggle" open><summary><section id="method.rchunks" class="method"><span class="rightside"><span class="since" title="Stable since Rust version 1.31.0">1.31.0</span> · <a class="src" href="https://doc.rust-lang.org/1.85.0/src/core/slice/mod.rs.html#1662">Source</a></span><h4 class="code-header">pub fn <a href="#method.rchunks" class="fn">rchunks</a>(&self, chunk_size: <a class="primitive" href="https://doc.rust-lang.org/1.85.0/std/primitive.usize.html">usize</a>) -> <a class="struct" href="https://doc.rust-lang.org/1.85.0/core/slice/iter/struct.RChunks.html" title="struct core::slice::iter::RChunks">RChunks</a><'_, T></h4></section></summary><div class="docblock"><p>Returns an iterator over <code>chunk_size</code> elements of the slice at a time, starting at the end
of the slice.</p>
<p>The chunks are slices and do not overlap. If <code>chunk_size</code> does not divide the length of the
slice, then the last chunk will not have length <code>chunk_size</code>.</p>
<p>See <a href="https://doc.rust-lang.org/1.85.0/std/primitive.slice.html#method.rchunks_exact" title="method slice::rchunks_exact"><code>rchunks_exact</code></a> for a variant of this iterator that returns chunks of always exactly
<code>chunk_size</code> elements, and <a href="https://doc.rust-lang.org/1.85.0/std/primitive.slice.html#method.chunks" title="method slice::chunks"><code>chunks</code></a> for the same iterator but starting at the beginning
of the slice.</p>
<h5 id="panics-13"><a class="doc-anchor" href="#panics-13">§</a>Panics</h5>
<p>Panics if <code>chunk_size</code> is zero.</p>
<h5 id="examples-47"><a class="doc-anchor" href="#examples-47">§</a>Examples</h5>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>slice = [<span class="string">'l'</span>, <span class="string">'o'</span>, <span class="string">'r'</span>, <span class="string">'e'</span>, <span class="string">'m'</span>];
<span class="kw">let </span><span class="kw-2">mut </span>iter = slice.rchunks(<span class="number">2</span>);
<span class="macro">assert_eq!</span>(iter.next().unwrap(), <span class="kw-2">&</span>[<span class="string">'e'</span>, <span class="string">'m'</span>]);
<span class="macro">assert_eq!</span>(iter.next().unwrap(), <span class="kw-2">&</span>[<span class="string">'o'</span>, <span class="string">'r'</span>]);
<span class="macro">assert_eq!</span>(iter.next().unwrap(), <span class="kw-2">&</span>[<span class="string">'l'</span>]);
<span class="macro">assert!</span>(iter.next().is_none());</code></pre></div>
</div></details><details class="toggle method-toggle" open><summary><section id="method.rchunks_mut" class="method"><span class="rightside"><span class="since" title="Stable since Rust version 1.31.0">1.31.0</span> · <a class="src" href="https://doc.rust-lang.org/1.85.0/src/core/slice/mod.rs.html#1701">Source</a></span><h4 class="code-header">pub fn <a href="#method.rchunks_mut" class="fn">rchunks_mut</a>(&mut self, chunk_size: <a class="primitive" href="https://doc.rust-lang.org/1.85.0/std/primitive.usize.html">usize</a>) -> <a class="struct" href="https://doc.rust-lang.org/1.85.0/core/slice/iter/struct.RChunksMut.html" title="struct core::slice::iter::RChunksMut">RChunksMut</a><'_, T></h4></section></summary><div class="docblock"><p>Returns an iterator over <code>chunk_size</code> elements of the slice at a time, starting at the end
of the slice.</p>
<p>The chunks are mutable slices, and do not overlap. If <code>chunk_size</code> does not divide the
length of the slice, then the last chunk will not have length <code>chunk_size</code>.</p>
<p>See <a href="https://doc.rust-lang.org/1.85.0/std/primitive.slice.html#method.rchunks_exact_mut" title="method slice::rchunks_exact_mut"><code>rchunks_exact_mut</code></a> for a variant of this iterator that returns chunks of always
exactly <code>chunk_size</code> elements, and <a href="https://doc.rust-lang.org/1.85.0/std/primitive.slice.html#method.chunks_mut" title="method slice::chunks_mut"><code>chunks_mut</code></a> for the same iterator but starting at the
beginning of the slice.</p>
<h5 id="panics-14"><a class="doc-anchor" href="#panics-14">§</a>Panics</h5>
<p>Panics if <code>chunk_size</code> is zero.</p>
<h5 id="examples-48"><a class="doc-anchor" href="#examples-48">§</a>Examples</h5>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>v = <span class="kw-2">&mut </span>[<span class="number">0</span>, <span class="number">0</span>, <span class="number">0</span>, <span class="number">0</span>, <span class="number">0</span>];
<span class="kw">let </span><span class="kw-2">mut </span>count = <span class="number">1</span>;
<span class="kw">for </span>chunk <span class="kw">in </span>v.rchunks_mut(<span class="number">2</span>) {
<span class="kw">for </span>elem <span class="kw">in </span>chunk.iter_mut() {
<span class="kw-2">*</span>elem += count;
}
count += <span class="number">1</span>;
}
<span class="macro">assert_eq!</span>(v, <span class="kw-2">&</span>[<span class="number">3</span>, <span class="number">2</span>, <span class="number">2</span>, <span class="number">1</span>, <span class="number">1</span>]);</code></pre></div>
</div></details><details class="toggle method-toggle" open><summary><section id="method.rchunks_exact" class="method"><span class="rightside"><span class="since" title="Stable since Rust version 1.31.0">1.31.0</span> · <a class="src" href="https://doc.rust-lang.org/1.85.0/src/core/slice/mod.rs.html#1741">Source</a></span><h4 class="code-header">pub fn <a href="#method.rchunks_exact" class="fn">rchunks_exact</a>(&self, chunk_size: <a class="primitive" href="https://doc.rust-lang.org/1.85.0/std/primitive.usize.html">usize</a>) -> <a class="struct" href="https://doc.rust-lang.org/1.85.0/core/slice/iter/struct.RChunksExact.html" title="struct core::slice::iter::RChunksExact">RChunksExact</a><'_, T></h4></section></summary><div class="docblock"><p>Returns an iterator over <code>chunk_size</code> elements of the slice at a time, starting at the
end of the slice.</p>
<p>The chunks are slices and do not overlap. If <code>chunk_size</code> does not divide the length of the
slice, then the last up to <code>chunk_size-1</code> elements will be omitted and can be retrieved
from the <code>remainder</code> function of the iterator.</p>
<p>Due to each chunk having exactly <code>chunk_size</code> elements, the compiler can often optimize the
resulting code better than in the case of <a href="https://doc.rust-lang.org/1.85.0/std/primitive.slice.html#method.rchunks" title="method slice::rchunks"><code>rchunks</code></a>.</p>
<p>See <a href="https://doc.rust-lang.org/1.85.0/std/primitive.slice.html#method.rchunks" title="method slice::rchunks"><code>rchunks</code></a> for a variant of this iterator that also returns the remainder as a smaller
chunk, and <a href="https://doc.rust-lang.org/1.85.0/std/primitive.slice.html#method.chunks_exact" title="method slice::chunks_exact"><code>chunks_exact</code></a> for the same iterator but starting at the beginning of the
slice.</p>
<h5 id="panics-15"><a class="doc-anchor" href="#panics-15">§</a>Panics</h5>
<p>Panics if <code>chunk_size</code> is zero.</p>
<h5 id="examples-49"><a class="doc-anchor" href="#examples-49">§</a>Examples</h5>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>slice = [<span class="string">'l'</span>, <span class="string">'o'</span>, <span class="string">'r'</span>, <span class="string">'e'</span>, <span class="string">'m'</span>];
<span class="kw">let </span><span class="kw-2">mut </span>iter = slice.rchunks_exact(<span class="number">2</span>);
<span class="macro">assert_eq!</span>(iter.next().unwrap(), <span class="kw-2">&</span>[<span class="string">'e'</span>, <span class="string">'m'</span>]);
<span class="macro">assert_eq!</span>(iter.next().unwrap(), <span class="kw-2">&</span>[<span class="string">'o'</span>, <span class="string">'r'</span>]);
<span class="macro">assert!</span>(iter.next().is_none());
<span class="macro">assert_eq!</span>(iter.remainder(), <span class="kw-2">&</span>[<span class="string">'l'</span>]);</code></pre></div>
</div></details><details class="toggle method-toggle" open><summary><section id="method.rchunks_exact_mut" class="method"><span class="rightside"><span class="since" title="Stable since Rust version 1.31.0">1.31.0</span> · <a class="src" href="https://doc.rust-lang.org/1.85.0/src/core/slice/mod.rs.html#1785">Source</a></span><h4 class="code-header">pub fn <a href="#method.rchunks_exact_mut" class="fn">rchunks_exact_mut</a>(&mut self, chunk_size: <a class="primitive" href="https://doc.rust-lang.org/1.85.0/std/primitive.usize.html">usize</a>) -> <a class="struct" href="https://doc.rust-lang.org/1.85.0/core/slice/iter/struct.RChunksExactMut.html" title="struct core::slice::iter::RChunksExactMut">RChunksExactMut</a><'_, T></h4></section></summary><div class="docblock"><p>Returns an iterator over <code>chunk_size</code> elements of the slice at a time, starting at the end
of the slice.</p>
<p>The chunks are mutable slices, and do not overlap. If <code>chunk_size</code> does not divide the
length of the slice, then the last up to <code>chunk_size-1</code> elements will be omitted and can be
retrieved from the <code>into_remainder</code> function of the iterator.</p>
<p>Due to each chunk having exactly <code>chunk_size</code> elements, the compiler can often optimize the
resulting code better than in the case of <a href="https://doc.rust-lang.org/1.85.0/std/primitive.slice.html#method.chunks_mut" title="method slice::chunks_mut"><code>chunks_mut</code></a>.</p>
<p>See <a href="https://doc.rust-lang.org/1.85.0/std/primitive.slice.html#method.rchunks_mut" title="method slice::rchunks_mut"><code>rchunks_mut</code></a> for a variant of this iterator that also returns the remainder as a
smaller chunk, and <a href="https://doc.rust-lang.org/1.85.0/std/primitive.slice.html#method.chunks_exact_mut" title="method slice::chunks_exact_mut"><code>chunks_exact_mut</code></a> for the same iterator but starting at the beginning
of the slice.</p>
<h5 id="panics-16"><a class="doc-anchor" href="#panics-16">§</a>Panics</h5>
<p>Panics if <code>chunk_size</code> is zero.</p>
<h5 id="examples-50"><a class="doc-anchor" href="#examples-50">§</a>Examples</h5>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>v = <span class="kw-2">&mut </span>[<span class="number">0</span>, <span class="number">0</span>, <span class="number">0</span>, <span class="number">0</span>, <span class="number">0</span>];
<span class="kw">let </span><span class="kw-2">mut </span>count = <span class="number">1</span>;
<span class="kw">for </span>chunk <span class="kw">in </span>v.rchunks_exact_mut(<span class="number">2</span>) {
<span class="kw">for </span>elem <span class="kw">in </span>chunk.iter_mut() {
<span class="kw-2">*</span>elem += count;
}
count += <span class="number">1</span>;
}
<span class="macro">assert_eq!</span>(v, <span class="kw-2">&</span>[<span class="number">0</span>, <span class="number">2</span>, <span class="number">2</span>, <span class="number">1</span>, <span class="number">1</span>]);</code></pre></div>
</div></details><details class="toggle method-toggle" open><summary><section id="method.chunk_by" class="method"><span class="rightside"><span class="since" title="Stable since Rust version 1.77.0">1.77.0</span> · <a class="src" href="https://doc.rust-lang.org/1.85.0/src/core/slice/mod.rs.html#1824-1826">Source</a></span><h4 class="code-header">pub fn <a href="#method.chunk_by" class="fn">chunk_by</a><F>(&self, pred: F) -> <a class="struct" href="https://doc.rust-lang.org/1.85.0/core/slice/iter/struct.ChunkBy.html" title="struct core::slice::iter::ChunkBy">ChunkBy</a><'_, T, F><div class="where">where
F: <a class="trait" href="https://doc.rust-lang.org/1.85.0/core/ops/function/trait.FnMut.html" title="trait core::ops::function::FnMut">FnMut</a>(<a class="primitive" href="https://doc.rust-lang.org/1.85.0/std/primitive.reference.html">&T</a>, <a class="primitive" href="https://doc.rust-lang.org/1.85.0/std/primitive.reference.html">&T</a>) -> <a class="primitive" href="https://doc.rust-lang.org/1.85.0/std/primitive.bool.html">bool</a>,</div></h4></section></summary><div class="docblock"><p>Returns an iterator over the slice producing non-overlapping runs
of elements using the predicate to separate them.</p>
<p>The predicate is called for every pair of consecutive elements,
meaning that it is called on <code>slice[0]</code> and <code>slice[1]</code>,
followed by <code>slice[1]</code> and <code>slice[2]</code>, and so on.</p>
<h5 id="examples-51"><a class="doc-anchor" href="#examples-51">§</a>Examples</h5>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>slice = <span class="kw-2">&</span>[<span class="number">1</span>, <span class="number">1</span>, <span class="number">1</span>, <span class="number">3</span>, <span class="number">3</span>, <span class="number">2</span>, <span class="number">2</span>, <span class="number">2</span>];
<span class="kw">let </span><span class="kw-2">mut </span>iter = slice.chunk_by(|a, b| a == b);
<span class="macro">assert_eq!</span>(iter.next(), <span class="prelude-val">Some</span>(<span class="kw-2">&</span>[<span class="number">1</span>, <span class="number">1</span>, <span class="number">1</span>][..]));
<span class="macro">assert_eq!</span>(iter.next(), <span class="prelude-val">Some</span>(<span class="kw-2">&</span>[<span class="number">3</span>, <span class="number">3</span>][..]));
<span class="macro">assert_eq!</span>(iter.next(), <span class="prelude-val">Some</span>(<span class="kw-2">&</span>[<span class="number">2</span>, <span class="number">2</span>, <span class="number">2</span>][..]));
<span class="macro">assert_eq!</span>(iter.next(), <span class="prelude-val">None</span>);</code></pre></div>
<p>This method can be used to extract the sorted subslices:</p>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>slice = <span class="kw-2">&</span>[<span class="number">1</span>, <span class="number">1</span>, <span class="number">2</span>, <span class="number">3</span>, <span class="number">2</span>, <span class="number">3</span>, <span class="number">2</span>, <span class="number">3</span>, <span class="number">4</span>];
<span class="kw">let </span><span class="kw-2">mut </span>iter = slice.chunk_by(|a, b| a <= b);
<span class="macro">assert_eq!</span>(iter.next(), <span class="prelude-val">Some</span>(<span class="kw-2">&</span>[<span class="number">1</span>, <span class="number">1</span>, <span class="number">2</span>, <span class="number">3</span>][..]));
<span class="macro">assert_eq!</span>(iter.next(), <span class="prelude-val">Some</span>(<span class="kw-2">&</span>[<span class="number">2</span>, <span class="number">3</span>][..]));
<span class="macro">assert_eq!</span>(iter.next(), <span class="prelude-val">Some</span>(<span class="kw-2">&</span>[<span class="number">2</span>, <span class="number">3</span>, <span class="number">4</span>][..]));
<span class="macro">assert_eq!</span>(iter.next(), <span class="prelude-val">None</span>);</code></pre></div>
</div></details><details class="toggle method-toggle" open><summary><section id="method.chunk_by_mut" class="method"><span class="rightside"><span class="since" title="Stable since Rust version 1.77.0">1.77.0</span> · <a class="src" href="https://doc.rust-lang.org/1.85.0/src/core/slice/mod.rs.html#1865-1867">Source</a></span><h4 class="code-header">pub fn <a href="#method.chunk_by_mut" class="fn">chunk_by_mut</a><F>(&mut self, pred: F) -> <a class="struct" href="https://doc.rust-lang.org/1.85.0/core/slice/iter/struct.ChunkByMut.html" title="struct core::slice::iter::ChunkByMut">ChunkByMut</a><'_, T, F><div class="where">where
F: <a class="trait" href="https://doc.rust-lang.org/1.85.0/core/ops/function/trait.FnMut.html" title="trait core::ops::function::FnMut">FnMut</a>(<a class="primitive" href="https://doc.rust-lang.org/1.85.0/std/primitive.reference.html">&T</a>, <a class="primitive" href="https://doc.rust-lang.org/1.85.0/std/primitive.reference.html">&T</a>) -> <a class="primitive" href="https://doc.rust-lang.org/1.85.0/std/primitive.bool.html">bool</a>,</div></h4></section></summary><div class="docblock"><p>Returns an iterator over the slice producing non-overlapping mutable
runs of elements using the predicate to separate them.</p>
<p>The predicate is called for every pair of consecutive elements,
meaning that it is called on <code>slice[0]</code> and <code>slice[1]</code>,
followed by <code>slice[1]</code> and <code>slice[2]</code>, and so on.</p>
<h5 id="examples-52"><a class="doc-anchor" href="#examples-52">§</a>Examples</h5>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>slice = <span class="kw-2">&mut </span>[<span class="number">1</span>, <span class="number">1</span>, <span class="number">1</span>, <span class="number">3</span>, <span class="number">3</span>, <span class="number">2</span>, <span class="number">2</span>, <span class="number">2</span>];
<span class="kw">let </span><span class="kw-2">mut </span>iter = slice.chunk_by_mut(|a, b| a == b);
<span class="macro">assert_eq!</span>(iter.next(), <span class="prelude-val">Some</span>(<span class="kw-2">&mut </span>[<span class="number">1</span>, <span class="number">1</span>, <span class="number">1</span>][..]));
<span class="macro">assert_eq!</span>(iter.next(), <span class="prelude-val">Some</span>(<span class="kw-2">&mut </span>[<span class="number">3</span>, <span class="number">3</span>][..]));
<span class="macro">assert_eq!</span>(iter.next(), <span class="prelude-val">Some</span>(<span class="kw-2">&mut </span>[<span class="number">2</span>, <span class="number">2</span>, <span class="number">2</span>][..]));
<span class="macro">assert_eq!</span>(iter.next(), <span class="prelude-val">None</span>);</code></pre></div>
<p>This method can be used to extract the sorted subslices:</p>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>slice = <span class="kw-2">&mut </span>[<span class="number">1</span>, <span class="number">1</span>, <span class="number">2</span>, <span class="number">3</span>, <span class="number">2</span>, <span class="number">3</span>, <span class="number">2</span>, <span class="number">3</span>, <span class="number">4</span>];
<span class="kw">let </span><span class="kw-2">mut </span>iter = slice.chunk_by_mut(|a, b| a <= b);
<span class="macro">assert_eq!</span>(iter.next(), <span class="prelude-val">Some</span>(<span class="kw-2">&mut </span>[<span class="number">1</span>, <span class="number">1</span>, <span class="number">2</span>, <span class="number">3</span>][..]));
<span class="macro">assert_eq!</span>(iter.next(), <span class="prelude-val">Some</span>(<span class="kw-2">&mut </span>[<span class="number">2</span>, <span class="number">3</span>][..]));
<span class="macro">assert_eq!</span>(iter.next(), <span class="prelude-val">Some</span>(<span class="kw-2">&mut </span>[<span class="number">2</span>, <span class="number">3</span>, <span class="number">4</span>][..]));
<span class="macro">assert_eq!</span>(iter.next(), <span class="prelude-val">None</span>);</code></pre></div>
</div></details><details class="toggle method-toggle" open><summary><section id="method.split_at" class="method"><span class="rightside"><span class="since" title="Stable since Rust version 1.0.0">1.0.0</span> · <a class="src" href="https://doc.rust-lang.org/1.85.0/src/core/slice/mod.rs.html#1911">Source</a></span><h4 class="code-header">pub fn <a href="#method.split_at" class="fn">split_at</a>(&self, mid: <a class="primitive" href="https://doc.rust-lang.org/1.85.0/std/primitive.usize.html">usize</a>) -> (&<a class="primitive" href="https://doc.rust-lang.org/1.85.0/std/primitive.slice.html">[T]</a>, &<a class="primitive" href="https://doc.rust-lang.org/1.85.0/std/primitive.slice.html">[T]</a>)</h4></section></summary><div class="docblock"><p>Divides one slice into two at an index.</p>
<p>The first will contain all indices from <code>[0, mid)</code> (excluding
the index <code>mid</code> itself) and the second will contain all
indices from <code>[mid, len)</code> (excluding the index <code>len</code> itself).</p>
<h5 id="panics-17"><a class="doc-anchor" href="#panics-17">§</a>Panics</h5>
<p>Panics if <code>mid > len</code>. For a non-panicking alternative see
<a href="https://doc.rust-lang.org/1.85.0/std/primitive.slice.html#method.split_at_checked" title="method slice::split_at_checked"><code>split_at_checked</code></a>.</p>
<h5 id="examples-53"><a class="doc-anchor" href="#examples-53">§</a>Examples</h5>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>v = [<span class="string">'a'</span>, <span class="string">'b'</span>, <span class="string">'c'</span>];
{
<span class="kw">let </span>(left, right) = v.split_at(<span class="number">0</span>);
<span class="macro">assert_eq!</span>(left, []);
<span class="macro">assert_eq!</span>(right, [<span class="string">'a'</span>, <span class="string">'b'</span>, <span class="string">'c'</span>]);
}
{
<span class="kw">let </span>(left, right) = v.split_at(<span class="number">2</span>);
<span class="macro">assert_eq!</span>(left, [<span class="string">'a'</span>, <span class="string">'b'</span>]);
<span class="macro">assert_eq!</span>(right, [<span class="string">'c'</span>]);
}
{
<span class="kw">let </span>(left, right) = v.split_at(<span class="number">3</span>);
<span class="macro">assert_eq!</span>(left, [<span class="string">'a'</span>, <span class="string">'b'</span>, <span class="string">'c'</span>]);
<span class="macro">assert_eq!</span>(right, []);
}</code></pre></div>
</div></details><details class="toggle method-toggle" open><summary><section id="method.split_at_mut" class="method"><span class="rightside"><span class="since" title="Stable since Rust version 1.0.0">1.0.0</span> · <a class="src" href="https://doc.rust-lang.org/1.85.0/src/core/slice/mod.rs.html#1945">Source</a></span><h4 class="code-header">pub fn <a href="#method.split_at_mut" class="fn">split_at_mut</a>(&mut self, mid: <a class="primitive" href="https://doc.rust-lang.org/1.85.0/std/primitive.usize.html">usize</a>) -> (&mut <a class="primitive" href="https://doc.rust-lang.org/1.85.0/std/primitive.slice.html">[T]</a>, &mut <a class="primitive" href="https://doc.rust-lang.org/1.85.0/std/primitive.slice.html">[T]</a>)</h4></section></summary><div class="docblock"><p>Divides one mutable slice into two at an index.</p>
<p>The first will contain all indices from <code>[0, mid)</code> (excluding
the index <code>mid</code> itself) and the second will contain all
indices from <code>[mid, len)</code> (excluding the index <code>len</code> itself).</p>
<h5 id="panics-18"><a class="doc-anchor" href="#panics-18">§</a>Panics</h5>
<p>Panics if <code>mid > len</code>. For a non-panicking alternative see
<a href="https://doc.rust-lang.org/1.85.0/std/primitive.slice.html#method.split_at_mut_checked" title="method slice::split_at_mut_checked"><code>split_at_mut_checked</code></a>.</p>
<h5 id="examples-54"><a class="doc-anchor" href="#examples-54">§</a>Examples</h5>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span><span class="kw-2">mut </span>v = [<span class="number">1</span>, <span class="number">0</span>, <span class="number">3</span>, <span class="number">0</span>, <span class="number">5</span>, <span class="number">6</span>];
<span class="kw">let </span>(left, right) = v.split_at_mut(<span class="number">2</span>);
<span class="macro">assert_eq!</span>(left, [<span class="number">1</span>, <span class="number">0</span>]);
<span class="macro">assert_eq!</span>(right, [<span class="number">3</span>, <span class="number">0</span>, <span class="number">5</span>, <span class="number">6</span>]);
left[<span class="number">1</span>] = <span class="number">2</span>;
right[<span class="number">1</span>] = <span class="number">4</span>;
<span class="macro">assert_eq!</span>(v, [<span class="number">1</span>, <span class="number">2</span>, <span class="number">3</span>, <span class="number">4</span>, <span class="number">5</span>, <span class="number">6</span>]);</code></pre></div>
</div></details><details class="toggle method-toggle" open><summary><section id="method.split_at_unchecked" class="method"><span class="rightside"><span class="since" title="Stable since Rust version 1.79.0">1.79.0</span> · <a class="src" href="https://doc.rust-lang.org/1.85.0/src/core/slice/mod.rs.html#1996">Source</a></span><h4 class="code-header">pub unsafe fn <a href="#method.split_at_unchecked" class="fn">split_at_unchecked</a>(&self, mid: <a class="primitive" href="https://doc.rust-lang.org/1.85.0/std/primitive.usize.html">usize</a>) -> (&<a class="primitive" href="https://doc.rust-lang.org/1.85.0/std/primitive.slice.html">[T]</a>, &<a class="primitive" href="https://doc.rust-lang.org/1.85.0/std/primitive.slice.html">[T]</a>)</h4></section></summary><div class="docblock"><p>Divides one slice into two at an index, without doing bounds checking.</p>
<p>The first will contain all indices from <code>[0, mid)</code> (excluding
the index <code>mid</code> itself) and the second will contain all
indices from <code>[mid, len)</code> (excluding the index <code>len</code> itself).</p>
<p>For a safe alternative see <a href="https://doc.rust-lang.org/1.85.0/std/primitive.slice.html#method.split_at" title="method slice::split_at"><code>split_at</code></a>.</p>
<h5 id="safety-6"><a class="doc-anchor" href="#safety-6">§</a>Safety</h5>
<p>Calling this method with an out-of-bounds index is <em><a href="https://doc.rust-lang.org/reference/behavior-considered-undefined.html">undefined behavior</a></em>
even if the resulting reference is not used. The caller has to ensure that
<code>0 <= mid <= self.len()</code>.</p>
<h5 id="examples-55"><a class="doc-anchor" href="#examples-55">§</a>Examples</h5>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>v = [<span class="string">'a'</span>, <span class="string">'b'</span>, <span class="string">'c'</span>];
<span class="kw">unsafe </span>{
<span class="kw">let </span>(left, right) = v.split_at_unchecked(<span class="number">0</span>);
<span class="macro">assert_eq!</span>(left, []);
<span class="macro">assert_eq!</span>(right, [<span class="string">'a'</span>, <span class="string">'b'</span>, <span class="string">'c'</span>]);
}
<span class="kw">unsafe </span>{
<span class="kw">let </span>(left, right) = v.split_at_unchecked(<span class="number">2</span>);
<span class="macro">assert_eq!</span>(left, [<span class="string">'a'</span>, <span class="string">'b'</span>]);
<span class="macro">assert_eq!</span>(right, [<span class="string">'c'</span>]);
}
<span class="kw">unsafe </span>{
<span class="kw">let </span>(left, right) = v.split_at_unchecked(<span class="number">3</span>);
<span class="macro">assert_eq!</span>(left, [<span class="string">'a'</span>, <span class="string">'b'</span>, <span class="string">'c'</span>]);
<span class="macro">assert_eq!</span>(right, []);
}</code></pre></div>
</div></details><details class="toggle method-toggle" open><summary><section id="method.split_at_mut_unchecked" class="method"><span class="rightside"><span class="since" title="Stable since Rust version 1.79.0">1.79.0</span> · <a class="src" href="https://doc.rust-lang.org/1.85.0/src/core/slice/mod.rs.html#2049">Source</a></span><h4 class="code-header">pub unsafe fn <a href="#method.split_at_mut_unchecked" class="fn">split_at_mut_unchecked</a>(
&mut self,
mid: <a class="primitive" href="https://doc.rust-lang.org/1.85.0/std/primitive.usize.html">usize</a>,
) -> (&mut <a class="primitive" href="https://doc.rust-lang.org/1.85.0/std/primitive.slice.html">[T]</a>, &mut <a class="primitive" href="https://doc.rust-lang.org/1.85.0/std/primitive.slice.html">[T]</a>)</h4></section></summary><div class="docblock"><p>Divides one mutable slice into two at an index, without doing bounds checking.</p>
<p>The first will contain all indices from <code>[0, mid)</code> (excluding
the index <code>mid</code> itself) and the second will contain all
indices from <code>[mid, len)</code> (excluding the index <code>len</code> itself).</p>
<p>For a safe alternative see <a href="https://doc.rust-lang.org/1.85.0/std/primitive.slice.html#method.split_at_mut" title="method slice::split_at_mut"><code>split_at_mut</code></a>.</p>
<h5 id="safety-7"><a class="doc-anchor" href="#safety-7">§</a>Safety</h5>
<p>Calling this method with an out-of-bounds index is <em><a href="https://doc.rust-lang.org/reference/behavior-considered-undefined.html">undefined behavior</a></em>
even if the resulting reference is not used. The caller has to ensure that
<code>0 <= mid <= self.len()</code>.</p>
<h5 id="examples-56"><a class="doc-anchor" href="#examples-56">§</a>Examples</h5>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span><span class="kw-2">mut </span>v = [<span class="number">1</span>, <span class="number">0</span>, <span class="number">3</span>, <span class="number">0</span>, <span class="number">5</span>, <span class="number">6</span>];
<span class="comment">// scoped to restrict the lifetime of the borrows
</span><span class="kw">unsafe </span>{
<span class="kw">let </span>(left, right) = v.split_at_mut_unchecked(<span class="number">2</span>);
<span class="macro">assert_eq!</span>(left, [<span class="number">1</span>, <span class="number">0</span>]);
<span class="macro">assert_eq!</span>(right, [<span class="number">3</span>, <span class="number">0</span>, <span class="number">5</span>, <span class="number">6</span>]);
left[<span class="number">1</span>] = <span class="number">2</span>;
right[<span class="number">1</span>] = <span class="number">4</span>;
}
<span class="macro">assert_eq!</span>(v, [<span class="number">1</span>, <span class="number">2</span>, <span class="number">3</span>, <span class="number">4</span>, <span class="number">5</span>, <span class="number">6</span>]);</code></pre></div>
</div></details><details class="toggle method-toggle" open><summary><section id="method.split_at_checked" class="method"><span class="rightside"><span class="since" title="Stable since Rust version 1.80.0">1.80.0</span> · <a class="src" href="https://doc.rust-lang.org/1.85.0/src/core/slice/mod.rs.html#2110">Source</a></span><h4 class="code-header">pub fn <a href="#method.split_at_checked" class="fn">split_at_checked</a>(&self, mid: <a class="primitive" href="https://doc.rust-lang.org/1.85.0/std/primitive.usize.html">usize</a>) -> <a class="enum" href="https://doc.rust-lang.org/1.85.0/core/option/enum.Option.html" title="enum core::option::Option">Option</a><(&<a class="primitive" href="https://doc.rust-lang.org/1.85.0/std/primitive.slice.html">[T]</a>, &<a class="primitive" href="https://doc.rust-lang.org/1.85.0/std/primitive.slice.html">[T]</a>)></h4></section></summary><div class="docblock"><p>Divides one slice into two at an index, returning <code>None</code> if the slice is
too short.</p>
<p>If <code>mid ≤ len</code> returns a pair of slices where the first will contain all
indices from <code>[0, mid)</code> (excluding the index <code>mid</code> itself) and the
second will contain all indices from <code>[mid, len)</code> (excluding the index
<code>len</code> itself).</p>
<p>Otherwise, if <code>mid > len</code>, returns <code>None</code>.</p>
<h5 id="examples-57"><a class="doc-anchor" href="#examples-57">§</a>Examples</h5>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>v = [<span class="number">1</span>, -<span class="number">2</span>, <span class="number">3</span>, -<span class="number">4</span>, <span class="number">5</span>, -<span class="number">6</span>];
{
<span class="kw">let </span>(left, right) = v.split_at_checked(<span class="number">0</span>).unwrap();
<span class="macro">assert_eq!</span>(left, []);
<span class="macro">assert_eq!</span>(right, [<span class="number">1</span>, -<span class="number">2</span>, <span class="number">3</span>, -<span class="number">4</span>, <span class="number">5</span>, -<span class="number">6</span>]);
}
{
<span class="kw">let </span>(left, right) = v.split_at_checked(<span class="number">2</span>).unwrap();
<span class="macro">assert_eq!</span>(left, [<span class="number">1</span>, -<span class="number">2</span>]);
<span class="macro">assert_eq!</span>(right, [<span class="number">3</span>, -<span class="number">4</span>, <span class="number">5</span>, -<span class="number">6</span>]);
}
{
<span class="kw">let </span>(left, right) = v.split_at_checked(<span class="number">6</span>).unwrap();
<span class="macro">assert_eq!</span>(left, [<span class="number">1</span>, -<span class="number">2</span>, <span class="number">3</span>, -<span class="number">4</span>, <span class="number">5</span>, -<span class="number">6</span>]);
<span class="macro">assert_eq!</span>(right, []);
}
<span class="macro">assert_eq!</span>(<span class="prelude-val">None</span>, v.split_at_checked(<span class="number">7</span>));</code></pre></div>
</div></details><details class="toggle method-toggle" open><summary><section id="method.split_at_mut_checked" class="method"><span class="rightside"><span class="since" title="Stable since Rust version 1.80.0">1.80.0</span> · <a class="src" href="https://doc.rust-lang.org/1.85.0/src/core/slice/mod.rs.html#2149">Source</a></span><h4 class="code-header">pub fn <a href="#method.split_at_mut_checked" class="fn">split_at_mut_checked</a>(
&mut self,
mid: <a class="primitive" href="https://doc.rust-lang.org/1.85.0/std/primitive.usize.html">usize</a>,
) -> <a class="enum" href="https://doc.rust-lang.org/1.85.0/core/option/enum.Option.html" title="enum core::option::Option">Option</a><(&mut <a class="primitive" href="https://doc.rust-lang.org/1.85.0/std/primitive.slice.html">[T]</a>, &mut <a class="primitive" href="https://doc.rust-lang.org/1.85.0/std/primitive.slice.html">[T]</a>)></h4></section></summary><div class="docblock"><p>Divides one mutable slice into two at an index, returning <code>None</code> if the
slice is too short.</p>
<p>If <code>mid ≤ len</code> returns a pair of slices where the first will contain all
indices from <code>[0, mid)</code> (excluding the index <code>mid</code> itself) and the
second will contain all indices from <code>[mid, len)</code> (excluding the index
<code>len</code> itself).</p>
<p>Otherwise, if <code>mid > len</code>, returns <code>None</code>.</p>
<h5 id="examples-58"><a class="doc-anchor" href="#examples-58">§</a>Examples</h5>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span><span class="kw-2">mut </span>v = [<span class="number">1</span>, <span class="number">0</span>, <span class="number">3</span>, <span class="number">0</span>, <span class="number">5</span>, <span class="number">6</span>];
<span class="kw">if let </span><span class="prelude-val">Some</span>((left, right)) = v.split_at_mut_checked(<span class="number">2</span>) {
<span class="macro">assert_eq!</span>(left, [<span class="number">1</span>, <span class="number">0</span>]);
<span class="macro">assert_eq!</span>(right, [<span class="number">3</span>, <span class="number">0</span>, <span class="number">5</span>, <span class="number">6</span>]);
left[<span class="number">1</span>] = <span class="number">2</span>;
right[<span class="number">1</span>] = <span class="number">4</span>;
}
<span class="macro">assert_eq!</span>(v, [<span class="number">1</span>, <span class="number">2</span>, <span class="number">3</span>, <span class="number">4</span>, <span class="number">5</span>, <span class="number">6</span>]);
<span class="macro">assert_eq!</span>(<span class="prelude-val">None</span>, v.split_at_mut_checked(<span class="number">7</span>));</code></pre></div>
</div></details><details class="toggle method-toggle" open><summary><section id="method.split" class="method"><span class="rightside"><span class="since" title="Stable since Rust version 1.0.0">1.0.0</span> · <a class="src" href="https://doc.rust-lang.org/1.85.0/src/core/slice/mod.rs.html#2201-2203">Source</a></span><h4 class="code-header">pub fn <a href="#method.split" class="fn">split</a><F>(&self, pred: F) -> <a class="struct" href="https://doc.rust-lang.org/1.85.0/core/slice/iter/struct.Split.html" title="struct core::slice::iter::Split">Split</a><'_, T, F><div class="where">where