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longest_affix.html
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longest_affix.html
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<title>Longest common prefix/suffix — longest_affix • hutils</title>
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<h1>Longest common prefix/suffix</h1>
<small class="dont-index">Source: <a href='https://github.com/hughparsonage/hutils/blob/master/R/longest_affix.R'><code>R/longest_affix.R</code></a></small>
<div class="hidden name"><code>longest_affix.Rd</code></div>
</div>
<div class="ref-description">
<p>Longest common prefix/suffix</p>
</div>
<pre class="usage"><span class='fu'>trim_common_affixes</span>(<span class='no'>x</span>, <span class='kw'>.x</span> <span class='kw'>=</span> <span class='kw'>NULL</span>, <span class='kw'>na.rm</span> <span class='kw'>=</span> <span class='fl'>TRUE</span>, <span class='kw'>prefixes</span> <span class='kw'>=</span> <span class='fl'>TRUE</span>,
<span class='kw'>suffixes</span> <span class='kw'>=</span> <span class='fl'>TRUE</span>, <span class='kw'>warn_if_no_prefix</span> <span class='kw'>=</span> <span class='fl'>TRUE</span>,
<span class='kw'>warn_if_no_suffix</span> <span class='kw'>=</span> <span class='fl'>TRUE</span>)
<span class='fu'>longest_suffix</span>(<span class='no'>x</span>, <span class='kw'>.x</span> <span class='kw'>=</span> <span class='kw'>NULL</span>, <span class='kw'>na.rm</span> <span class='kw'>=</span> <span class='fl'>TRUE</span>, <span class='kw'>warn_if_no_suffix</span> <span class='kw'>=</span> <span class='fl'>TRUE</span>)
<span class='fu'>longest_prefix</span>(<span class='no'>x</span>, <span class='kw'>.x</span> <span class='kw'>=</span> <span class='kw'>NULL</span>, <span class='kw'>na.rm</span> <span class='kw'>=</span> <span class='fl'>TRUE</span>, <span class='kw'>warn_if_no_prefix</span> <span class='kw'>=</span> <span class='fl'>TRUE</span>)</pre>
<h2 class="hasAnchor" id="arguments"><a class="anchor" href="#arguments"></a>Arguments</h2>
<table class="ref-arguments">
<colgroup><col class="name" /><col class="desc" /></colgroup>
<tr>
<th>x</th>
<td><p>A character vector.</p></td>
</tr>
<tr>
<th>.x</th>
<td><p>If <code>NULL</code>, the default, ignored. May be used if <code>x</code> is
known to be free of <code>NA</code>s.</p></td>
</tr>
<tr>
<th>na.rm</th>
<td><p>(logical, default: <code>TRUE</code>) If <code>FALSE</code>, an <code>NA</code> in
<code>x</code> means <code>""</code> is the only common affix. If <code>NA</code>, the longest
prefix/suffix is <code>NA_character_</code> (provided <code><a href='https://www.rdocumentation.org/packages/base/topics/NA'>anyNA(x)</a></code>).</p>
<p>If <code>anyNA(x) == FALSE</code> <code>na.rm</code> has no effect.</p></td>
</tr>
<tr>
<th>prefixes</th>
<td><p>(logical, default: <code>TRUE</code>) If <code>TRUE</code>, trim prefixes.</p></td>
</tr>
<tr>
<th>suffixes</th>
<td><p>(logical, default: <code>TRUE</code>) If <code>TRUE</code>, trim suffixes.</p></td>
</tr>
<tr>
<th>warn_if_no_prefix, warn_if_no_suffix</th>
<td><p>(logical, default: <code>TRUE</code>)
If <code>FALSE</code>, if <code>x</code> has no common affixes the warning is suppressed.
(If no common prefix/suffix then the common affix returned will be <code>""</code>
(the empty string).)</p></td>
</tr>
</table>
<h2 class="hasAnchor" id="value"><a class="anchor" href="#value"></a>Value</h2>
<p>The longest common substring in <code>x</code> either at the start or end of each string.
For <code>trim_common_affixes</code> <code>x</code> with common prefix and common suffix
removed.</p>
<h2 class="hasAnchor" id="examples"><a class="anchor" href="#examples"></a>Examples</h2>
<pre class="examples"><div class='input'><span class='fu'>longest_prefix</span>(<span class='fu'><a href='https://www.rdocumentation.org/packages/base/topics/c'>c</a></span>(<span class='st'>"totalx"</span>, <span class='st'>"totaly"</span>, <span class='st'>"totalz"</span>))</div><div class='output co'>#> [1] "total"</div><div class='input'><span class='fu'>longest_suffix</span>(<span class='fu'><a href='https://www.rdocumentation.org/packages/base/topics/c'>c</a></span>(<span class='st'>"ztotal"</span>, <span class='st'>"ytotal"</span>, <span class='st'>"xtotal"</span>))</div><div class='output co'>#> [1] "total"</div></pre>
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<h2>Contents</h2>
<ul class="nav nav-pills nav-stacked">
<li><a href="#arguments">Arguments</a></li>
<li><a href="#value">Value</a></li>
<li><a href="#examples">Examples</a></li>
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