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<section id="string-split0-split-on-zero-bytes">
<h1>string-split0 - split on zero bytes<a class="headerlink" href="#string-split0-split-on-zero-bytes" title="Link to this heading">¶</a></h1>
<section id="synopsis">
<h2>Synopsis<a class="headerlink" href="#synopsis" title="Link to this heading">¶</a></h2>
<div class="highlight-fish-synopsis notranslate"><div class="highlight"><pre><span></span><span class="nf">string</span><span class="w"> </span><span class="no">split</span><span class="w"> </span><span class="g g-Other">[(</span><span class="no">-f</span><span class="w"> </span><span class="g g-Other">|</span><span class="w"> </span><span class="no">--fields</span><span class="g g-Other">)</span><span class="w"> </span><span class="no">FIELDS</span><span class="w"> </span><span class="g g-Other">[</span><span class="no">-a</span><span class="w"> </span><span class="g g-Other">|</span><span class="w"> </span><span class="no">--allow-empty</span><span class="g g-Other">]]</span><span class="w"> </span><span class="g g-Other">[(</span><span class="no">-m</span><span class="w"> </span><span class="g g-Other">|</span><span class="w"> </span><span class="no">--max</span><span class="g g-Other">)</span><span class="w"> </span><span class="no">MAX</span><span class="g g-Other">]</span><span class="w"> </span><span class="g g-Other">[</span><span class="no">-n</span><span class="w"> </span><span class="g g-Other">|</span><span class="w"> </span><span class="no">--no-empty</span><span class="g g-Other">]</span>
<span class="w"> </span><span class="g g-Other">[</span><span class="no">-q</span><span class="w"> </span><span class="g g-Other">|</span><span class="w"> </span><span class="no">--quiet</span><span class="g g-Other">]</span><span class="w"> </span><span class="g g-Other">[</span><span class="no">-r</span><span class="w"> </span><span class="g g-Other">|</span><span class="w"> </span><span class="no">--right</span><span class="g g-Other">]</span><span class="w"> </span><span class="no">SEP</span><span class="w"> </span><span class="g g-Other">[</span><span class="no">STRING</span><span class="w"> </span><span class="g g-Other">...]</span>
<span class="nf">string</span><span class="w"> </span><span class="no">split0</span><span class="w"> </span><span class="g g-Other">[(</span><span class="no">-f</span><span class="w"> </span><span class="g g-Other">|</span><span class="w"> </span><span class="no">--fields</span><span class="g g-Other">)</span><span class="w"> </span><span class="no">FIELDS</span><span class="w"> </span><span class="g g-Other">[</span><span class="no">-a</span><span class="w"> </span><span class="g g-Other">|</span><span class="w"> </span><span class="no">--allow-empty</span><span class="g g-Other">]]</span><span class="w"> </span><span class="g g-Other">[(</span><span class="no">-m</span><span class="w"> </span><span class="g g-Other">|</span><span class="w"> </span><span class="no">--max</span><span class="g g-Other">)</span><span class="w"> </span><span class="no">MAX</span><span class="g g-Other">]</span><span class="w"> </span><span class="g g-Other">[</span><span class="no">-n</span><span class="w"> </span><span class="g g-Other">|</span><span class="w"> </span><span class="no">--no-empty</span><span class="g g-Other">]</span>
<span class="w"> </span><span class="g g-Other">[</span><span class="no">-q</span><span class="w"> </span><span class="g g-Other">|</span><span class="w"> </span><span class="no">--quiet</span><span class="g g-Other">]</span><span class="w"> </span><span class="g g-Other">[</span><span class="no">-r</span><span class="w"> </span><span class="g g-Other">|</span><span class="w"> </span><span class="no">--right</span><span class="g g-Other">]</span><span class="w"> </span><span class="g g-Other">[</span><span class="no">STRING</span><span class="w"> </span><span class="g g-Other">...]</span>
</pre></div>
</div>
</section>
<section id="description">
<h2>Description<a class="headerlink" href="#description" title="Link to this heading">¶</a></h2>
<p><code class="docutils literal notranslate"><span class="pre">string</span> <span class="pre">split</span></code> splits each <em>STRING</em> on the separator <em>SEP</em>, which can be an empty string. If <strong>-m</strong> or <strong>--max</strong> is specified, at most MAX splits are done on each <em>STRING</em>. If <strong>-r</strong> or <strong>--right</strong> is given, splitting is performed right-to-left. This is only useful in combination with <strong>-m</strong> or <strong>--max</strong>. With <strong>-n</strong> or <strong>--no-empty</strong>, empty results are excluded from consideration (e.g. <code class="docutils literal notranslate"><span class="pre">hello\n\nworld</span></code> would expand to two strings and not three). Exit status: 0 if at least one split was performed, or 1 otherwise.</p>
<p>Use <strong>-f</strong> or <strong>--fields</strong> to print out specific fields. FIELDS is a comma-separated string of field numbers and/or spans. Each field is one-indexed, and will be printed on separate lines. If a given field does not exist, then the command exits with status 1 and does not print anything, unless <strong>--allow-empty</strong> is used.</p>
<p>See also the <strong>--delimiter</strong> option of the <a class="reference internal" href="read.html"><span class="doc">read</span></a> command.</p>
<p><code class="docutils literal notranslate"><span class="pre">string</span> <span class="pre">split0</span></code> splits each <em>STRING</em> on the zero byte (NUL). Options are the same as <code class="docutils literal notranslate"><span class="pre">string</span> <span class="pre">split</span></code> except that no separator is given.</p>
<p><code class="docutils literal notranslate"><span class="pre">split0</span></code> has the important property that its output is not further split when used in a command substitution, allowing for the command substitution to produce elements containing newlines. This is most useful when used with Unix tools that produce zero bytes, such as <code class="docutils literal notranslate"><span class="pre">find</span> <span class="pre">-print0</span></code> or <code class="docutils literal notranslate"><span class="pre">sort</span> <span class="pre">-z</span></code>. See split0 examples below.</p>
<p>Be aware that commandline arguments cannot include NULs, so you likely want to pass to <code class="docutils literal notranslate"><span class="pre">string</span> <span class="pre">split0</span></code> via a pipe, not a command substitution.</p>
</section>
<section id="examples">
<h2>Examples<a class="headerlink" href="#examples" title="Link to this heading">¶</a></h2>
<div class="highlight-fish-docs-samples notranslate"><div class="highlight"><pre><span></span><span class="gp">>_ </span><span class="nf">string</span><span class="w"> </span><span class="no">split</span><span class="w"> </span><span class="no">.</span><span class="w"> </span><span class="no">example.com</span>
<span class="go">example</span>
<span class="go">com</span>
<span class="gp">>_ </span><span class="nf">string</span><span class="w"> </span><span class="no">split</span><span class="w"> </span><span class="no">-r</span><span class="w"> </span><span class="no">-m1</span><span class="w"> </span><span class="no">/</span><span class="w"> </span><span class="no">/usr/local/bin/fish</span>
<span class="go">/usr/local/bin</span>
<span class="go">fish</span>
<span class="gp">>_ </span><span class="nf">string</span><span class="w"> </span><span class="no">split</span><span class="w"> </span><span class="s1">''</span><span class="w"> </span><span class="no">abc</span>
<span class="go">a</span>
<span class="go">b</span>
<span class="go">c</span>
<span class="gp">>_ </span><span class="nf">string</span><span class="w"> </span><span class="no">split</span><span class="w"> </span><span class="no">--allow-empty</span><span class="w"> </span><span class="no">-f1,3-4,5</span><span class="w"> </span><span class="s1">''</span><span class="w"> </span><span class="no">abcd</span>
<span class="go">a</span>
<span class="go">c</span>
<span class="go">d</span>
</pre></div>
</div>
<section id="nul-delimited-examples">
<h3>NUL Delimited Examples<a class="headerlink" href="#nul-delimited-examples" title="Link to this heading">¶</a></h3>
<div class="highlight-fish-docs-samples notranslate"><div class="highlight"><pre><span></span><span class="gp">>_ </span><span class="c"># Count files in a directory, without being confused by newlines.</span>
<span class="gp">>_ </span><span class="c"># Note: Don't use `string split0 (find . -print0)`, because arguments cannot include NUL.</span>
<span class="gp">>_ </span><span class="nf">count</span><span class="w"> </span><span class="o">(</span><span class="nf">find</span><span class="w"> </span><span class="no">.</span><span class="w"> </span><span class="no">-print0</span><span class="w"> </span><span class="p">|</span><span class="w"> </span><span class="nf">string</span><span class="w"> </span><span class="no">split0</span><span class="o">)</span>
<span class="go">42</span>
<span class="gp">>_ </span><span class="c"># Sort a list of elements which may contain newlines</span>
<span class="gp">>_ </span><span class="nf">set</span><span class="w"> </span><span class="no">foo</span><span class="w"> </span><span class="no">beta</span><span class="w"> </span><span class="no">alpha</span><span class="se">\n</span><span class="no">gamma</span>
<span class="gp">>_ </span><span class="nf">set</span><span class="w"> </span><span class="no">foo</span><span class="w"> </span><span class="o">(</span><span class="nf">string</span><span class="w"> </span><span class="no">join0</span><span class="w"> </span><span class="o">$foo</span><span class="w"> </span><span class="p">|</span><span class="w"> </span><span class="nf">sort</span><span class="w"> </span><span class="no">-z</span><span class="w"> </span><span class="p">|</span><span class="w"> </span><span class="nf">string</span><span class="w"> </span><span class="no">split0</span><span class="o">)</span>
<span class="gp">>_ </span><span class="nf">string</span><span class="w"> </span><span class="no">escape</span><span class="w"> </span><span class="o">$foo[</span><span class="no">1</span><span class="o">]</span>
<span class="go">alpha\ngamma</span>
</pre></div>
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