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Updated Binary Search docs to show insert into an already sorted list #61742

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Updated Binary Search docs to show insert into an already sorted list #61742

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ba21a43
Updated Binary Search docs to show how to insert into an already sort…
Jun 11, 2019
f4bb9b3
change match in binary search docs to if let
ptallo Jul 10, 2019
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15 changes: 15 additions & 0 deletions src/libcore/slice/mod.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -1362,6 +1362,21 @@ impl<T> [T] {
/// let r = s.binary_search(&1);
/// assert!(match r { Ok(1..=4) => true, _ => false, });
/// ```
///
/// Inserts a new element into already sorted array while maintaining sorted
/// order. Then asserts that the item was inserted correctly.
///
/// ```
/// let mut s = vec![0, 1, 1, 1, 1, 2, 3, 5, 8, 13, 21, 34, 55];
/// let num = 14;
///
/// let idx = s.binary_search(&num);
/// if let Ok(idx) | Err(idx) {
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I believe this is invalid syntax and should be if let Ok(idx) | Err(idx) = idx {

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See error:

error: expected one of `=` or `|`, found `{`
 --> slice/mod.rs:1361:27
  |
8 | if let Ok(idx) | Err(idx) {
  |                           ^ expected one of `=` or `|` here

/// s.insert(idx, num)
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There have been losed a semicolon
s.insert(idx,num);

/// };
///
/// assert_eq!(s[10], num)
/// ```
#[stable(feature = "rust1", since = "1.0.0")]
pub fn binary_search(&self, x: &T) -> Result<usize, usize>
where T: Ord
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