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<article class="main-content">
<section>
<section class="section">
<h1>Functions</h1>
<p>The following functions are available globally.</p>
</section>
<section class="section task-group-section">
<div class="task-group">
<ul>
<li class="item">
<div>
<code>
<a name="/s:ZF10SwiftShelloi2ogU___FTQ_FQ_Q0__Q0_"></a>
<a name="//apple_ref/swift/Function/|&gt;(_:_:)" class="dashAnchor"></a>
<a class="token" href="#/s:ZF10SwiftShelloi2ogU___FTQ_FQ_Q0__Q0_">|&gt;(_:_:)</a>
</code>
</div>
<div class="height-container">
<div class="pointer-container"></div>
<section class="section">
<div class="pointer"></div>
<div class="abstract">
<p>Undocumented</p>
</div>
</section>
</div>
</li>
<li class="item">
<div>
<code>
<a name="/s:F10SwiftShell6filterUSs12SequenceType_USs13GeneratorType___FFQQQ_9Generator7ElementSbFT6sourceQ__GVSs12LazySequenceGVSs18FilterSequenceViewQ___"></a>
<a name="//apple_ref/swift/Function/filter(_:)" class="dashAnchor"></a>
<a class="token" href="#/s:F10SwiftShell6filterUSs12SequenceType_USs13GeneratorType___FFQQQ_9Generator7ElementSbFT6sourceQ__GVSs12LazySequenceGVSs18FilterSequenceViewQ___">filter(_:)</a>
</code>
</div>
<div class="height-container">
<div class="pointer-container"></div>
<section class="section">
<div class="pointer"></div>
<div class="abstract">
<p>Lazily return a sequence containing the elements of source, in order, that satisfy the predicate includeElement</p>
</div>
<div class="declaration">
<h4>Declaration</h4>
<div class="Swift">
<p class="aside-title">Swift</p>
<pre class="highlight"><code><span class="kd">public</span> <span class="kd">func</span> <span class="n">filter</span> <span class="o">&lt;</span><span class="kt">S</span> <span class="p">:</span> <span class="kt">SequenceType</span><span class="o">&gt;</span>
<span class="p">(</span><span class="nv">includeElement</span><span class="p">:</span> <span class="p">(</span><span class="kt">S</span><span class="o">.</span><span class="kt">Generator</span><span class="o">.</span><span class="kt">Element</span><span class="p">)</span> <span class="o">-&gt;</span> <span class="kt">Bool</span><span class="p">)</span>
<span class="p">(</span><span class="nv">source</span><span class="p">:</span> <span class="kt">S</span><span class="p">)</span>
<span class="o">-&gt;</span> <span class="kt">LazySequence</span><span class="o">&lt;</span><span class="kt">FilterSequenceView</span><span class="o">&lt;</span><span class="kt">S</span><span class="o">&gt;&gt;</span></code></pre>
</div>
</div>
</section>
</div>
</li>
<li class="item">
<div>
<code>
<a name="/s:F10SwiftShell6sortedUSs12SequenceType_USs13GeneratorType___FFTQQQ_9Generator7ElementS3__SbFT6sourceQ__GSaS3__"></a>
<a name="//apple_ref/swift/Function/sorted(_:)" class="dashAnchor"></a>
<a class="token" href="#/s:F10SwiftShell6sortedUSs12SequenceType_USs13GeneratorType___FFTQQQ_9Generator7ElementS3__SbFT6sourceQ__GSaS3__">sorted(_:)</a>
</code>
</div>
<div class="height-container">
<div class="pointer-container"></div>
<section class="section">
<div class="pointer"></div>
<div class="abstract">
<p>Return an <code>Array</code> containing the sorted elements of <code>source</code> according to &lsquo;isOrderedBefore&rsquo;.</p>
<p>Requires: <code>isOrderedBefore</code> is a <code>strict weak ordering
&lt;http://en.wikipedia.org/wiki/Strict_weak_order#Strict_weak_orderings&gt;</code> over <code>elements</code>.</p>
</div>
<div class="declaration">
<h4>Declaration</h4>
<div class="Swift">
<p class="aside-title">Swift</p>
<pre class="highlight"><code><span class="kd">public</span> <span class="kd">func</span> <span class="n">sorted</span> <span class="o">&lt;</span><span class="kt">S</span> <span class="p">:</span> <span class="kt">SequenceType</span><span class="o">&gt;</span>
<span class="p">(</span><span class="nv">isOrderedBefore</span><span class="p">:</span> <span class="p">(</span><span class="kt">S</span><span class="o">.</span><span class="kt">Generator</span><span class="o">.</span><span class="kt">Element</span><span class="p">,</span> <span class="kt">S</span><span class="o">.</span><span class="kt">Generator</span><span class="o">.</span><span class="kt">Element</span><span class="p">)</span> <span class="o">-&gt;</span> <span class="kt">Bool</span><span class="p">)</span>
<span class="p">(</span><span class="nv">source</span><span class="p">:</span> <span class="kt">S</span><span class="p">)</span>
<span class="o">-&gt;</span> <span class="p">[</span><span class="kt">S</span><span class="o">.</span><span class="kt">Generator</span><span class="o">.</span><span class="kt">Element</span><span class="p">]</span></code></pre>
</div>
</div>
</section>
</div>
</li>
<li class="item">
<div>
<code>
<a name="/s:F10SwiftShell3mapUSs12SequenceType__USs13GeneratorType___FFQQQ_9Generator7ElementQ0_FT6sourceQ__GVSs12LazySequenceGVSs15MapSequenceViewQ_Q0___"></a>
<a name="//apple_ref/swift/Function/map(_:)" class="dashAnchor"></a>
<a class="token" href="#/s:F10SwiftShell3mapUSs12SequenceType__USs13GeneratorType___FFQQQ_9Generator7ElementQ0_FT6sourceQ__GVSs12LazySequenceGVSs15MapSequenceViewQ_Q0___">map(_:)</a>
</code>
</div>
<div class="height-container">
<div class="pointer-container"></div>
<section class="section">
<div class="pointer"></div>
<div class="abstract">
<p>Lazily return a sequence containing the results of mapping transform over source.</p>
</div>
<div class="declaration">
<h4>Declaration</h4>
<div class="Swift">
<p class="aside-title">Swift</p>
<pre class="highlight"><code><span class="kd">public</span> <span class="kd">func</span> <span class="n">map</span> <span class="o">&lt;</span><span class="kt">S</span><span class="p">:</span> <span class="kt">SequenceType</span><span class="p">,</span> <span class="kt">T</span><span class="o">&gt;</span>
<span class="p">(</span><span class="nv">transform</span><span class="p">:</span> <span class="p">(</span><span class="kt">S</span><span class="o">.</span><span class="kt">Generator</span><span class="o">.</span><span class="kt">Element</span><span class="p">)</span> <span class="o">-&gt;</span> <span class="kt">T</span><span class="p">)</span>
<span class="p">(</span><span class="nv">source</span><span class="p">:</span> <span class="kt">S</span><span class="p">)</span>
<span class="o">-&gt;</span> <span class="kt">LazySequence</span><span class="o">&lt;</span><span class="kt">MapSequenceView</span><span class="o">&lt;</span><span class="kt">S</span><span class="p">,</span> <span class="kt">T</span><span class="o">&gt;&gt;</span></code></pre>
</div>
</div>
</section>
</div>
</li>
<li class="item">
<div>
<code>
<a name="/s:F10SwiftShell6reduceUSs12SequenceType__USs13GeneratorType___FTQ0_FTQ0_QQQ_9Generator7Element_Q0__FT8sequenceQ__Q0_"></a>
<a name="//apple_ref/swift/Function/reduce(_:_:)" class="dashAnchor"></a>
<a class="token" href="#/s:F10SwiftShell6reduceUSs12SequenceType__USs13GeneratorType___FTQ0_FTQ0_QQQ_9Generator7Element_Q0__FT8sequenceQ__Q0_">reduce(_:_:)</a>
</code>
</div>
<div class="height-container">
<div class="pointer-container"></div>
<section class="section">
<div class="pointer"></div>
<div class="abstract">
<p>Return the result of repeatedly calling combine with an accumulated value
initialized to initial and each element of sequence, in turn.</p>
</div>
<div class="declaration">
<h4>Declaration</h4>
<div class="Swift">
<p class="aside-title">Swift</p>
<pre class="highlight"><code><span class="kd">public</span> <span class="kd">func</span> <span class="n">reduce</span> <span class="o">&lt;</span><span class="kt">S</span> <span class="p">:</span> <span class="kt">SequenceType</span><span class="p">,</span> <span class="kt">U</span><span class="o">&gt;</span>
<span class="p">(</span><span class="nv">initial</span><span class="p">:</span> <span class="kt">U</span><span class="p">,</span> <span class="nv">combine</span><span class="p">:</span> <span class="p">(</span><span class="kt">U</span><span class="p">,</span> <span class="kt">S</span><span class="o">.</span><span class="kt">Generator</span><span class="o">.</span><span class="kt">Element</span><span class="p">)</span> <span class="o">-&gt;</span> <span class="kt">U</span><span class="p">)</span>
<span class="p">(</span><span class="nv">sequence</span><span class="p">:</span> <span class="kt">S</span><span class="p">)</span>
<span class="o">-&gt;</span> <span class="kt">U</span></code></pre>
</div>
</div>
</section>
</div>
</li>
<li class="item">
<div>
<code>
<a name="/s:F10SwiftShell5splitFTSS_FT4textSS_GSaSS_"></a>
<a name="//apple_ref/swift/Function/split(_:)" class="dashAnchor"></a>
<a class="token" href="#/s:F10SwiftShell5splitFTSS_FT4textSS_GSaSS_">split(_:)</a>
</code>
</div>
<div class="height-container">
<div class="pointer-container"></div>
<section class="section">
<div class="pointer"></div>
<div class="abstract">
<p>Split text over delimiter, returning an array.</p>
</div>
<div class="declaration">
<h4>Declaration</h4>
<div class="Swift">
<p class="aside-title">Swift</p>
<pre class="highlight"><code><span class="kd">public</span> <span class="kd">func</span> <span class="nf">split</span> <span class="p">(</span><span class="n">_</span> <span class="nv">delimiter</span><span class="p">:</span> <span class="kt">String</span> <span class="o">=</span> <span class="s">"</span><span class="se">\n</span><span class="s">"</span><span class="p">)(</span><span class="nv">text</span><span class="p">:</span> <span class="kt">String</span><span class="p">)</span> <span class="o">-&gt;</span> <span class="p">[</span><span class="kt">String</span><span class="p">]</span></code></pre>
</div>
</div>
</section>
</div>
</li>
<li class="item">
<div>
<code>
<a name="/s:F10SwiftShell4joinUSs24ExtensibleCollectionType_Ss12SequenceType_USs13GeneratorType__Ss16ForwardIndexType_Ss18_SignedIntegerType_Ss33_BuiltinIntegerLiteralConvertible___S2___FQ_FT8elementsQ0__Q_"></a>
<a name="//apple_ref/swift/Function/join(_:)" class="dashAnchor"></a>
<a class="token" href="#/s:F10SwiftShell4joinUSs24ExtensibleCollectionType_Ss12SequenceType_USs13GeneratorType__Ss16ForwardIndexType_Ss18_SignedIntegerType_Ss33_BuiltinIntegerLiteralConvertible___S2___FQ_FT8elementsQ0__Q_">join(_:)</a>
</code>
</div>
<div class="height-container">
<div class="pointer-container"></div>
<section class="section">
<div class="pointer"></div>
<div class="abstract">
<p>Insert separator between each item in elements.</p>
</div>
<div class="declaration">
<h4>Declaration</h4>
<div class="Swift">
<p class="aside-title">Swift</p>
<pre class="highlight"><code><span class="kd">public</span> <span class="kd">func</span> <span class="n">join</span> <span class="o">&lt;</span><span class="kt">C</span> <span class="p">:</span> <span class="kt">ExtensibleCollectionType</span><span class="p">,</span> <span class="kt">S</span> <span class="p">:</span> <span class="kt">SequenceType</span> <span class="k">where</span> <span class="kt">S</span><span class="o">.</span><span class="kt">Generator</span><span class="o">.</span><span class="kt">Element</span> <span class="o">==</span> <span class="kt">C</span><span class="o">&gt;</span>
<span class="p">(</span><span class="nv">separator</span><span class="p">:</span> <span class="kt">C</span><span class="p">)</span>
<span class="p">(</span><span class="nv">elements</span><span class="p">:</span> <span class="kt">S</span><span class="p">)</span>
<span class="o">-&gt;</span> <span class="kt">C</span></code></pre>
</div>
</div>
</section>
</div>
</li>
<li class="item">
<div>
<code>
<a name="/s:F10SwiftShell7toArrayUSs12SequenceType_USs13GeneratorType___FQ_GSaQQQ_9Generator7Element_"></a>
<a name="//apple_ref/swift/Function/toArray(_:)" class="dashAnchor"></a>
<a class="token" href="#/s:F10SwiftShell7toArrayUSs12SequenceType_USs13GeneratorType___FQ_GSaQQQ_9Generator7Element_">toArray(_:)</a>
</code>
</div>
<div class="height-container">
<div class="pointer-container"></div>
<section class="section">
<div class="pointer"></div>
<div class="abstract">
<p>Turn a sequence into an array. For use after the |&gt; operator.</p>
</div>
<div class="declaration">
<h4>Declaration</h4>
<div class="Swift">
<p class="aside-title">Swift</p>
<pre class="highlight"><code><span class="kd">public</span> <span class="kd">func</span> <span class="n">toArray</span> <span class="o">&lt;</span><span class="kt">S</span> <span class="p">:</span> <span class="kt">SequenceType</span><span class="o">&gt;</span> <span class="p">(</span><span class="nv">sequence</span><span class="p">:</span> <span class="kt">S</span><span class="p">)</span> <span class="o">-&gt;</span> <span class="p">[</span><span class="kt">S</span><span class="o">.</span><span class="kt">Generator</span><span class="o">.</span><span class="kt">Element</span><span class="p">]</span></code></pre>
</div>
</div>
</section>
</div>
</li>
<li class="item">
<div>
<code>
<a name="/s:F10SwiftShell4dropUSs12SequenceType_Ss9Equatable_USs13GeneratorType__FGSaQ0__FT8sequenceQ__GVSs12LazySequenceGVSs18FilterSequenceViewQ___"></a>
<a name="//apple_ref/swift/Function/drop(_:)" class="dashAnchor"></a>
<a class="token" href="#/s:F10SwiftShell4dropUSs12SequenceType_Ss9Equatable_USs13GeneratorType__FGSaQ0__FT8sequenceQ__GVSs12LazySequenceGVSs18FilterSequenceViewQ___">drop(_:)</a>
</code>
</div>
<div class="height-container">
<div class="pointer-container"></div>
<section class="section">
<div class="pointer"></div>
<div class="abstract">
<p>Discard all elements in <code>tobedropped</code> from sequence.</p>
</div>
<div class="declaration">
<h4>Declaration</h4>
<div class="Swift">
<p class="aside-title">Swift</p>
<pre class="highlight"><code><span class="kd">public</span> <span class="kd">func</span> <span class="n">drop</span> <span class="o">&lt;</span><span class="kt">S</span> <span class="p">:</span> <span class="kt">SequenceType</span><span class="p">,</span> <span class="kt">T</span> <span class="p">:</span> <span class="kt">Equatable</span> <span class="k">where</span> <span class="kt">S</span><span class="o">.</span><span class="kt">Generator</span><span class="o">.</span><span class="kt">Element</span> <span class="o">==</span> <span class="kt">T</span><span class="o">&gt;</span>
<span class="p">(</span><span class="nv">tobedropped</span><span class="p">:</span> <span class="p">[</span><span class="kt">T</span><span class="p">])</span>
<span class="p">(</span><span class="nv">sequence</span><span class="p">:</span> <span class="kt">S</span><span class="p">)</span>
<span class="o">-&gt;</span> <span class="kt">LazySequence</span><span class="o">&lt;</span><span class="kt">FilterSequenceView</span><span class="o">&lt;</span><span class="kt">S</span><span class="o">&gt;&gt;</span></code></pre>
</div>
</div>
</section>
</div>
</li>
<li class="item">
<div>
<code>
<a name="/s:F10SwiftShell4takeUSs12SequenceType__USs13GeneratorType__FSiFT8sequenceQ__GSaQ0__"></a>
<a name="//apple_ref/swift/Function/take(_:)" class="dashAnchor"></a>
<a class="token" href="#/s:F10SwiftShell4takeUSs12SequenceType__USs13GeneratorType__FSiFT8sequenceQ__GSaQ0__">take(_:)</a>
</code>
</div>
<div class="height-container">
<div class="pointer-container"></div>
<section class="section">
<div class="pointer"></div>
<div class="abstract">
<p>Return at most the first <code>numbertotake</code> elements of sequence</p>
</div>
<div class="declaration">
<h4>Declaration</h4>
<div class="Swift">
<p class="aside-title">Swift</p>
<pre class="highlight"><code><span class="kd">public</span> <span class="kd">func</span> <span class="n">take</span> <span class="o">&lt;</span><span class="kt">S</span> <span class="p">:</span> <span class="kt">SequenceType</span><span class="p">,</span> <span class="kt">T</span> <span class="k">where</span> <span class="kt">S</span><span class="o">.</span><span class="kt">Generator</span><span class="o">.</span><span class="kt">Element</span> <span class="o">==</span> <span class="kt">T</span><span class="o">&gt;</span>
<span class="p">(</span><span class="nv">numbertotake</span><span class="p">:</span> <span class="kt">Int</span><span class="p">)(</span><span class="nv">sequence</span><span class="p">:</span> <span class="kt">S</span><span class="p">)</span> <span class="o">-&gt;</span> <span class="p">[</span><span class="kt">T</span><span class="p">]</span></code></pre>
</div>
</div>
</section>
</div>
</li>
</ul>
</div>
<div class="task-group">
<ul>
<li class="item">
<div>
<code>
<a name="/s:F10SwiftShell17printErrorAndExitFSST_"></a>
<a name="//apple_ref/swift/Function/printErrorAndExit(_:)" class="dashAnchor"></a>
<a class="token" href="#/s:F10SwiftShell17printErrorAndExitFSST_">printErrorAndExit(_:)</a>
</code>
</div>
<div class="height-container">
<div class="pointer-container"></div>
<section class="section">
<div class="pointer"></div>
<div class="abstract">
<p>Print message to standard error and halt execution.</p>
</div>
<div class="declaration">
<h4>Declaration</h4>
<div class="Swift">
<p class="aside-title">Swift</p>
<pre class="highlight"><code><span class="k">@noreturn</span> <span class="kd">public</span> <span class="kd">func</span> <span class="nf">printErrorAndExit</span> <span class="p">(</span><span class="nv">errormessage</span><span class="p">:</span> <span class="kt">String</span><span class="p">)</span></code></pre>
</div>
</div>
</section>
</div>
</li>
<li class="item">
<div>
<code>
<a name="/s:F10SwiftShell4openFSSPS_18ReadableStreamType_"></a>
<a name="//apple_ref/swift/Function/open(_:)" class="dashAnchor"></a>
<a class="token" href="#/s:F10SwiftShell4openFSSPS_18ReadableStreamType_">open(_:)</a>
</code>
</div>
<div class="height-container">
<div class="pointer-container"></div>
<section class="section">
<div class="pointer"></div>
<div class="abstract">
<p>Open a file for reading, and exit if an error occurs.</p>
</div>
<div class="declaration">
<h4>Declaration</h4>
<div class="Swift">
<p class="aside-title">Swift</p>
<pre class="highlight"><code><span class="kd">public</span> <span class="kd">func</span> <span class="nf">open</span> <span class="p">(</span><span class="nv">path</span><span class="p">:</span> <span class="kt">String</span><span class="p">)</span> <span class="o">-&gt;</span> <span class="kt">ReadableStreamType</span></code></pre>
</div>
</div>
</section>
</div>
</li>
<li class="item">
<div>
<code>
<a name="/s:F10SwiftShell4openFT10forWritingSS9overwriteSb_PS_19WriteableStreamType_"></a>
<a name="//apple_ref/swift/Function/open(forWriting:overwrite:)" class="dashAnchor"></a>
<a class="token" href="#/s:F10SwiftShell4openFT10forWritingSS9overwriteSb_PS_19WriteableStreamType_">open(forWriting:overwrite:)</a>
</code>
</div>
<div class="height-container">
<div class="pointer-container"></div>
<section class="section">
<div class="pointer"></div>
<div class="abstract">
<p>Open a file for writing, create it if it doesn&rsquo;t exist, and exit if an error occurs.
If the file already exists and overwrite=false, the writing will begin at the end of the file.</p>
</div>
<div class="declaration">
<h4>Declaration</h4>
<div class="Swift">
<p class="aside-title">Swift</p>
<pre class="highlight"><code><span class="kd">public</span> <span class="kd">func</span> <span class="nf">open</span> <span class="p">(</span><span class="n">forWriting</span> <span class="nv">path</span><span class="p">:</span> <span class="kt">String</span><span class="p">,</span> <span class="nv">overwrite</span><span class="p">:</span> <span class="kt">Bool</span> <span class="o">=</span> <span class="kc">false</span><span class="p">)</span> <span class="o">-&gt;</span> <span class="kt">WriteableStreamType</span></code></pre>
</div>
</div>
<div>
<h4>Parameters</h4>
<table class="graybox">
<tbody>
<tr>
<td>
<code>
<em>overwrite</em>
</code>
</td>
<td>
<div>
<p>If true, replace the file if it exists.</p>
</div>
</td>
</tr>
</tbody>
</table>
</div>
</section>
</div>
</li>
</ul>
</div>
<div class="task-group">
<ul>
<li class="item">
<div>
<code>
<a name="/s:F10SwiftShell6streamFSSPS_18ReadableStreamType_"></a>
<a name="//apple_ref/swift/Function/stream(_:)" class="dashAnchor"></a>
<a class="token" href="#/s:F10SwiftShell6streamFSSPS_18ReadableStreamType_">stream(_:)</a>
</code>
</div>
<div class="height-container">
<div class="pointer-container"></div>
<section class="section">
<div class="pointer"></div>
<div class="abstract">
<p>Create a stream from a String.</p>
</div>
<div class="declaration">
<h4>Declaration</h4>
<div class="Swift">
<p class="aside-title">Swift</p>
<pre class="highlight"><code><span class="kd">public</span> <span class="kd">func</span> <span class="nf">stream</span> <span class="p">(</span><span class="nv">text</span><span class="p">:</span> <span class="kt">String</span><span class="p">)</span> <span class="o">-&gt;</span> <span class="kt">ReadableStreamType</span></code></pre>
</div>
</div>
</section>
</div>
</li>
<li class="item">
<div>
<code>
<a name="/s:F10SwiftShell6streamFFT_FT_GSqSS_PS_18ReadableStreamType_"></a>
<a name="//apple_ref/swift/Function/stream(_:)" class="dashAnchor"></a>
<a class="token" href="#/s:F10SwiftShell6streamFFT_FT_GSqSS_PS_18ReadableStreamType_">stream(_:)</a>
</code>
</div>
<div class="height-container">
<div class="pointer-container"></div>
<section class="section">
<div class="pointer"></div>
<div class="abstract">
<p>Create a stream from a function returning a generator function, which is called every time the stream is asked for more text.</p>
<p>stream {
// initialisation&hellip;
return {
// called repeatedly by the resulting stream
// return text, or return nil when done.
}
}</p>
</div>
<div class="declaration">
<h4>Declaration</h4>
<div class="Swift">
<p class="aside-title">Swift</p>
<pre class="highlight"><code><span class="kd">public</span> <span class="kd">func</span> <span class="nf">stream</span> <span class="p">(</span> <span class="nv">closure</span><span class="p">:()</span> <span class="o">-&gt;</span> <span class="p">()</span> <span class="o">-&gt;</span> <span class="kt">String</span><span class="p">?</span> <span class="p">)</span> <span class="o">-&gt;</span> <span class="kt">ReadableStreamType</span></code></pre>
</div>
</div>
<div>
<h4>Return Value</h4>
<p>The output stream.</p>
</div>
</section>
</div>
</li>
<li class="item">
<div>
<code>
<a name="/s:F10SwiftShell6streamUSs12SequenceType_USs13GeneratorType__FQ_PS_18ReadableStreamType_"></a>
<a name="//apple_ref/swift/Function/stream(_:)" class="dashAnchor"></a>
<a class="token" href="#/s:F10SwiftShell6streamUSs12SequenceType_USs13GeneratorType__FQ_PS_18ReadableStreamType_">stream(_:)</a>
</code>
</div>
<div class="height-container">
<div class="pointer-container"></div>
<section class="section">
<div class="pointer"></div>
<div class="abstract">
<p>Create a stream from a sequence of Strings.</p>
</div>
<div class="declaration">
<h4>Declaration</h4>
<div class="Swift">
<p class="aside-title">Swift</p>
<pre class="highlight"><code><span class="kd">public</span> <span class="kd">func</span> <span class="n">stream</span> <span class="o">&lt;</span><span class="kt">Seq</span> <span class="p">:</span> <span class="kt">SequenceType</span> <span class="k">where</span> <span class="kt">Seq</span><span class="o">.</span><span class="kt">Generator</span><span class="o">.</span><span class="kt">Element</span> <span class="o">==</span> <span class="kt">String</span><span class="o">&gt;</span> <span class="p">(</span><span class="nv">sequence</span><span class="p">:</span> <span class="kt">Seq</span><span class="p">)</span> <span class="o">-&gt;</span> <span class="kt">ReadableStreamType</span></code></pre>
</div>
</div>
</section>
</div>
</li>
<li class="item">
<div>
<code>
<a name="/s:F10SwiftShell7streamsFT_TPS_19WriteableStreamType_PS_18ReadableStreamType__"></a>
<a name="//apple_ref/swift/Function/streams()" class="dashAnchor"></a>
<a class="token" href="#/s:F10SwiftShell7streamsFT_TPS_19WriteableStreamType_PS_18ReadableStreamType__">streams()</a>
</code>
</div>
<div class="height-container">
<div class="pointer-container"></div>
<section class="section">
<div class="pointer"></div>
<div class="abstract">
<p>Return a writable stream and a readable stream. What you write to the 1st one can be read from the 2nd one.
Make sure to call closeStream() on the writable stream before you call read() on the readable one.</p>
</div>
<div class="declaration">
<h4>Declaration</h4>
<div class="Swift">
<p class="aside-title">Swift</p>
<pre class="highlight"><code><span class="kd">public</span> <span class="kd">func</span> <span class="nf">streams</span> <span class="p">()</span> <span class="o">-&gt;</span> <span class="p">(</span><span class="kt">WriteableStreamType</span><span class="p">,</span> <span class="kt">ReadableStreamType</span><span class="p">)</span></code></pre>
</div>
</div>
</section>
</div>
</li>
<li class="item">
<div>
<code>
<a name="/s:F10SwiftShell5splitFT9delimiterSS_FT6streamPS_18ReadableStreamType__GVSs10SequenceOfSS_"></a>
<a name="//apple_ref/swift/Function/split(delimiter:)" class="dashAnchor"></a>
<a class="token" href="#/s:F10SwiftShell5splitFT9delimiterSS_FT6streamPS_18ReadableStreamType__GVSs10SequenceOfSS_">split(delimiter:)</a>
</code>
</div>
<div class="height-container">
<div class="pointer-container"></div>
<section class="section">
<div class="pointer"></div>
<div class="abstract">
<p>Split a stream lazily</p>
</div>
<div class="declaration">
<h4>Declaration</h4>
<div class="Swift">
<p class="aside-title">Swift</p>
<pre class="highlight"><code><span class="kd">public</span> <span class="kd">func</span> <span class="nf">split</span> <span class="p">(</span><span class="nv">delimiter</span><span class="p">:</span> <span class="kt">String</span> <span class="o">=</span> <span class="s">"</span><span class="se">\n</span><span class="s">"</span><span class="p">)(</span><span class="nv">stream</span><span class="p">:</span> <span class="kt">ReadableStreamType</span><span class="p">)</span> <span class="o">-&gt;</span> <span class="kt">SequenceOf</span><span class="o">&lt;</span><span class="kt">String</span><span class="o">&gt;</span></code></pre>
</div>
</div>
</section>
</div>
</li>
<li class="item">
<div>
<code>
<a name="/s:F10SwiftShell7writeToU__FPS_19WriteableStreamType_FT5inputQ__T_"></a>
<a name="//apple_ref/swift/Function/writeTo(_:)" class="dashAnchor"></a>
<a class="token" href="#/s:F10SwiftShell7writeToU__FPS_19WriteableStreamType_FT5inputQ__T_">writeTo(_:)</a>
</code>
</div>
<div class="height-container">
<div class="pointer-container"></div>
<section class="section">
<div class="pointer"></div>
<div class="abstract">
<p>Write something to a stream.</p>
<pre class="highlight plaintext"><code>something |&gt; writeTo(writablestream)
</code></pre>
</div>
<div class="declaration">
<h4>Declaration</h4>
<div class="Swift">
<p class="aside-title">Swift</p>
<pre class="highlight"><code><span class="kd">public</span> <span class="kd">func</span> <span class="n">writeTo</span> <span class="o">&lt;</span><span class="kt">T</span><span class="o">&gt;</span> <span class="p">(</span><span class="nv">stream</span><span class="p">:</span> <span class="kt">WriteableStreamType</span><span class="p">)(</span><span class="nv">input</span><span class="p">:</span> <span class="kt">T</span><span class="p">)</span></code></pre>
</div>
</div>
</section>
</div>
</li>
<li class="item">
<div>
<code>
<a name="/s:F10SwiftShell7writeToFPS_19WriteableStreamType_FT5inputSS_T_"></a>
<a name="//apple_ref/swift/Function/writeTo(_:)" class="dashAnchor"></a>
<a class="token" href="#/s:F10SwiftShell7writeToFPS_19WriteableStreamType_FT5inputSS_T_">writeTo(_:)</a>
</code>
</div>
<div class="height-container">
<div class="pointer-container"></div>
<section class="section">
<div class="pointer"></div>
<div class="abstract">
<p>Write a String to a writable stream.</p>
</div>
<div class="declaration">
<h4>Declaration</h4>
<div class="Swift">
<p class="aside-title">Swift</p>
<pre class="highlight"><code><span class="kd">public</span> <span class="kd">func</span> <span class="nf">writeTo</span> <span class="p">(</span><span class="nv">stream</span><span class="p">:</span> <span class="kt">WriteableStreamType</span><span class="p">)(</span><span class="nv">input</span><span class="p">:</span> <span class="kt">String</span><span class="p">)</span></code></pre>
</div>
</div>
</section>
</div>
</li>
<li class="item">
<div>
<code>
<a name="/s:F10SwiftShell7writeToUSs12SequenceType_USs13GeneratorType___FPS_19WriteableStreamType_FT3seqQ__T_"></a>
<a name="//apple_ref/swift/Function/writeTo(_:)" class="dashAnchor"></a>
<a class="token" href="#/s:F10SwiftShell7writeToUSs12SequenceType_USs13GeneratorType___FPS_19WriteableStreamType_FT3seqQ__T_">writeTo(_:)</a>
</code>
</div>
<div class="height-container">
<div class="pointer-container"></div>
<section class="section">
<div class="pointer"></div>
<div class="abstract">
<p>Write a sequence to a stream.</p>
</div>
<div class="declaration">
<h4>Declaration</h4>
<div class="Swift">
<p class="aside-title">Swift</p>
<pre class="highlight"><code><span class="kd">public</span> <span class="kd">func</span> <span class="n">writeTo</span> <span class="o">&lt;</span><span class="kt">S</span> <span class="p">:</span> <span class="kt">SequenceType</span><span class="o">&gt;</span> <span class="p">(</span><span class="nv">stream</span><span class="p">:</span> <span class="kt">WriteableStreamType</span><span class="p">)(</span><span class="nv">seq</span><span class="p">:</span> <span class="kt">S</span><span class="p">)</span></code></pre>
</div>
</div>
</section>
</div>
</li>
<li class="item">
<div>
<code>
<a name="/s:ZF10SwiftShelloi3oggU__FTQ_PS_19WriteableStreamType__T_"></a>
<a name="//apple_ref/swift/Function/|&gt;&gt;(_:_:)" class="dashAnchor"></a>
<a class="token" href="#/s:ZF10SwiftShelloi3oggU__FTQ_PS_19WriteableStreamType__T_">|&gt;&gt;(_:_:)</a>
</code>
</div>
<div class="height-container">
<div class="pointer-container"></div>
<section class="section">
<div class="pointer"></div>
<div class="abstract">
<p>Write something to a stream.</p>
<p>something |&gt;&gt; writablestream</p>
</div>
<div class="declaration">
<h4>Declaration</h4>
<div class="Swift">
<p class="aside-title">Swift</p>
<pre class="highlight"><code><span class="kd">public</span> <span class="kd">func</span> <span class="o">|&gt;&gt;</span> <span class="o">&lt;</span><span class="kt">T</span><span class="o">&gt;</span> <span class="p">(</span><span class="nv">input</span><span class="p">:</span> <span class="kt">T</span><span class="p">,</span> <span class="nv">stream</span><span class="p">:</span> <span class="kt">WriteableStreamType</span><span class="p">)</span></code></pre>
</div>
</div>
</section>
</div>
</li>
<li class="item">
<div>
<code>
<a name="/s:ZF10SwiftShelloi3oggFTSSPS_19WriteableStreamType__T_"></a>
<a name="//apple_ref/swift/Function/|&gt;&gt;(_:_:)" class="dashAnchor"></a>
<a class="token" href="#/s:ZF10SwiftShelloi3oggFTSSPS_19WriteableStreamType__T_">|&gt;&gt;(_:_:)</a>
</code>
</div>
<div class="height-container">
<div class="pointer-container"></div>
<section class="section">
<div class="pointer"></div>
<div class="abstract">
<p>Write a String to a writable stream.</p>
</div>
<div class="declaration">
<h4>Declaration</h4>
<div class="Swift">
<p class="aside-title">Swift</p>
<pre class="highlight"><code><span class="kd">public</span> <span class="kd">func</span> <span class="o">|&gt;&gt;</span> <span class="p">(</span><span class="nv">text</span><span class="p">:</span> <span class="kt">String</span><span class="p">,</span> <span class="nv">stream</span><span class="p">:</span> <span class="kt">WriteableStreamType</span><span class="p">)</span></code></pre>
</div>
</div>
</section>
</div>
</li>
<li class="item">
<div>
<code>
<a name="/s:ZF10SwiftShelloi3oggUSs12SequenceType_USs13GeneratorType___FTQ_PS_19WriteableStreamType__T_"></a>
<a name="//apple_ref/swift/Function/|&gt;&gt;(_:_:)" class="dashAnchor"></a>
<a class="token" href="#/s:ZF10SwiftShelloi3oggUSs12SequenceType_USs13GeneratorType___FTQ_PS_19WriteableStreamType__T_">|&gt;&gt;(_:_:)</a>
</code>
</div>
<div class="height-container">
<div class="pointer-container"></div>
<section class="section">
<div class="pointer"></div>
<div class="abstract">
<p>Write a sequence to a stream.</p>
</div>
<div class="declaration">
<h4>Declaration</h4>
<div class="Swift">
<p class="aside-title">Swift</p>
<pre class="highlight"><code><span class="kd">public</span> <span class="kd">func</span> <span class="o">|&gt;&gt;</span> <span class="o">&lt;</span><span class="kt">S</span> <span class="p">:</span> <span class="kt">SequenceType</span><span class="o">&gt;</span> <span class="p">(</span><span class="nv">seq</span><span class="p">:</span> <span class="kt">S</span><span class="p">,</span> <span class="nv">stream</span><span class="p">:</span> <span class="kt">WriteableStreamType</span><span class="p">)</span></code></pre>
</div>
</div>
</section>
</div>
</li>
</ul>
</div>
<div class="task-group">
<ul>
<li class="item">
<div>
<code>
<a name="/s:ZF10SwiftShelloi2ogFTPS_18ReadableStreamType_KT_PS0___PS0__"></a>
<a name="//apple_ref/swift/Function/|&gt;(_:_:)" class="dashAnchor"></a>
<a class="token" href="#/s:ZF10SwiftShelloi2ogFTPS_18ReadableStreamType_KT_PS0___PS0__">|&gt;(_:_:)</a>
</code>
</div>
<div class="height-container">
<div class="pointer-container"></div>
<section class="section">
<div class="pointer"></div>
<div class="abstract">
<p>Specific handling of func run (shellcommand: String) -&gt; ReadableStreamType on the right side using the stream on the
left side as standard input.</p>
<p>Warning: is only meant to be used with the <q>run</q> command, but could also unintentionally catch other uses of
<q>ReadableStreamType |> ReadableStreamType</q>, though that statement doesn&rsquo;t make any sense.</p>
</div>
<div class="declaration">
<h4>Declaration</h4>
<div class="Swift">
<p class="aside-title">Swift</p>
<pre class="highlight"><code><span class="kd">public</span> <span class="kd">func</span> <span class="o">|&gt;</span> <span class="p">(</span><span class="nv">lhs</span><span class="p">:</span> <span class="kt">ReadableStreamType</span><span class="p">,</span> <span class="k">@autoclosure</span> <span class="nv">rhs</span><span class="p">:</span> <span class="p">()</span> <span class="o">-&gt;</span> <span class="kt">ReadableStreamType</span><span class="p">)</span> <span class="o">-&gt;</span> <span class="kt">ReadableStreamType</span></code></pre>
</div>
</div>
</section>
</div>
</li>
<li class="item">
<div>
<code>
<a name="/s:F10SwiftShell3runFSSPS_18ReadableStreamType_"></a>
<a name="//apple_ref/swift/Function/run(_:)" class="dashAnchor"></a>
<a class="token" href="#/s:F10SwiftShell3runFSSPS_18ReadableStreamType_">run(_:)</a>
</code>
</div>
<div class="height-container">
<div class="pointer-container"></div>
<section class="section">
<div class="pointer"></div>
<div class="abstract">
<p>Run a shell command synchronously with no standard input,
or if to the right of a <q>ReadableStreamType |></q>, use the stream on the left side as standard input.</p>
</div>
<div class="declaration">
<h4>Declaration</h4>
<div class="Swift">
<p class="aside-title">Swift</p>
<pre class="highlight"><code><span class="kd">public</span> <span class="kd">func</span> <span class="nf">run</span> <span class="p">(</span><span class="nv">shellcommand</span><span class="p">:</span> <span class="kt">String</span><span class="p">)</span> <span class="o">-&gt;</span> <span class="kt">ReadableStreamType</span></code></pre>
</div>
</div>
<div>
<h4>Return Value</h4>
<p>Standard output</p>
</div>
</section>
</div>
</li>
<li class="item">
<div>
<code>
<a name="/s:F10SwiftShell1$FSSSS"></a>
<a name="//apple_ref/swift/Function/$(_:)" class="dashAnchor"></a>
<a class="token" href="#/s:F10SwiftShell1$FSSSS">$(_:)</a>
</code>
</div>
<div class="height-container">
<div class="pointer-container"></div>
<section class="section">
<div class="pointer"></div>
<div class="abstract">
<p>Shortcut for in-line command, returns output as String.</p>
</div>
<div class="declaration">
<h4>Declaration</h4>
<div class="Swift">
<p class="aside-title">Swift</p>
<pre class="highlight"><code><span class="kd">public</span> <span class="kd">func</span> <span class="err">$</span> <span class="p">(</span><span class="nv">shellcommand</span><span class="p">:</span> <span class="kt">String</span><span class="p">)</span> <span class="o">-&gt;</span> <span class="kt">String</span></code></pre>
</div>
</div>
</section>
</div>
</li>
<li class="item">
<div>
<code>
<a name="/s:F10SwiftShell10parametersUSs12SequenceType_USs13GeneratorType___FQ_SS"></a>
<a name="//apple_ref/swift/Function/parameters(_:)" class="dashAnchor"></a>
<a class="token" href="#/s:F10SwiftShell10parametersUSs12SequenceType_USs13GeneratorType___FQ_SS">parameters(_:)</a>
</code>
</div>
<div class="height-container">
<div class="pointer-container"></div>
<section class="section">
<div class="pointer"></div>
<div class="abstract">
<p>Turn a sequence into valid parameters for a shell command, properly quoted</p>
</div>
<div class="declaration">
<h4>Declaration</h4>
<div class="Swift">
<p class="aside-title">Swift</p>
<pre class="highlight"><code><span class="kd">public</span> <span class="kd">func</span> <span class="n">parameters</span> <span class="o">&lt;</span><span class="kt">S</span> <span class="p">:</span> <span class="kt">SequenceType</span><span class="o">&gt;</span> <span class="p">(</span><span class="nv">sequence</span><span class="p">:</span> <span class="kt">S</span><span class="p">)</span> <span class="o">-&gt;</span> <span class="kt">String</span></code></pre>
</div>
</div>
</section>
</div>
</li>
</ul>
</div>
<div class="task-group">
<ul>
<li class="item">
<div>
<code>
<a name="/s:ZF10SwiftShelloi1dFTSSSS_SS"></a>
<a name="//apple_ref/swift/Function//(_:_:)" class="dashAnchor"></a>
<a class="token" href="#/s:ZF10SwiftShelloi1dFTSSSS_SS">/(_:_:)</a>
</code>
</div>
<div class="height-container">
<div class="pointer-container"></div>
<section class="section">
<div class="pointer"></div>
<div class="abstract">
<p>Allows for <code>&quot;/directory&quot; / &quot;file.extension&quot;</code> etc.</p>
</div>
<div class="declaration">
<h4>Declaration</h4>
<div class="Swift">
<p class="aside-title">Swift</p>
<pre class="highlight"><code><span class="kd">public</span> <span class="kd">func</span> <span class="o">/</span> <span class="p">(</span><span class="nv">leftpath</span><span class="p">:</span> <span class="kt">String</span><span class="p">,</span> <span class="nv">rightpath</span><span class="p">:</span> <span class="kt">String</span><span class="p">)</span> <span class="o">-&gt;</span> <span class="kt">String</span></code></pre>
</div>
</div>
</section>
</div>
</li>
</ul>
</div>
</section>
</section>
<section id="footer">
<p>&copy; 2015 <a class="link" href="" target="_blank" rel="external"></a>. All rights reserved. (Last updated: 2015-05-19)</p>
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