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<article class="main-content">
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<div class="section-content top-matter">
<h1>GroupedObservable</h1>
<div class="declaration">
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<pre class="highlight swift"><code><span class="kd">public</span> <span class="kd">struct</span> <span class="kt">GroupedObservable</span><span class="o"><</span><span class="kt">Key</span><span class="p">,</span> <span class="kt">Element</span><span class="o">></span> <span class="p">:</span> <span class="kt"><a href="../Protocols/ObservableType.html">ObservableType</a></span></code></pre>
</div>
</div>
<p>Represents an observable sequence of elements that share a common key.
<code>GroupedObservable</code> is typically created by the <code>groupBy</code> operator.
Each <code>GroupedObservable</code> instance represents a collection of elements
that are grouped by a specific key.</p>
<p>Example usage:</p>
<pre class="highlight swift"><code><span class="k">let</span> <span class="nv">observable</span> <span class="o">=</span> <span class="kt">Observable</span><span class="o">.</span><span class="nf">of</span><span class="p">(</span><span class="s">"Apple"</span><span class="p">,</span> <span class="s">"Banana"</span><span class="p">,</span> <span class="s">"Apricot"</span><span class="p">,</span> <span class="s">"Blueberry"</span><span class="p">,</span> <span class="s">"Avocado"</span><span class="p">)</span>
<span class="k">let</span> <span class="nv">grouped</span> <span class="o">=</span> <span class="n">observable</span><span class="o">.</span><span class="n">groupBy</span> <span class="p">{</span> <span class="n">fruit</span> <span class="k">in</span>
<span class="n">fruit</span><span class="o">.</span><span class="n">first</span><span class="o">!</span> <span class="c1">// Grouping by the first letter of each fruit</span>
<span class="p">}</span>
<span class="n">_</span> <span class="o">=</span> <span class="n">grouped</span><span class="o">.</span><span class="n">subscribe</span> <span class="p">{</span> <span class="n">group</span> <span class="k">in</span>
<span class="nf">print</span><span class="p">(</span><span class="s">"Group: </span><span class="se">\(</span><span class="n">group</span><span class="o">.</span><span class="n">key</span><span class="se">)</span><span class="s">"</span><span class="p">)</span>
<span class="n">_</span> <span class="o">=</span> <span class="n">group</span><span class="o">.</span><span class="n">subscribe</span> <span class="p">{</span> <span class="n">event</span> <span class="k">in</span>
<span class="nf">print</span><span class="p">(</span><span class="n">event</span><span class="p">)</span>
<span class="p">}</span>
<span class="p">}</span>
</code></pre>
<p>This will print:</p>
<pre class="highlight swift"><code><span class="kt">Group</span><span class="p">:</span> <span class="kt">A</span>
<span class="nf">next</span><span class="p">(</span><span class="kt">Apple</span><span class="p">)</span>
<span class="nf">next</span><span class="p">(</span><span class="kt">Apricot</span><span class="p">)</span>
<span class="nf">next</span><span class="p">(</span><span class="kt">Avocado</span><span class="p">)</span>
<span class="kt">Group</span><span class="p">:</span> <span class="kt">B</span>
<span class="nf">next</span><span class="p">(</span><span class="kt">Banana</span><span class="p">)</span>
<span class="nf">next</span><span class="p">(</span><span class="kt">Blueberry</span><span class="p">)</span>
</code></pre>
</div>
</section>
<section class="section">
<div class="section-content">
<div class="task-group">
<ul class="item-container">
<li class="item">
<div>
<code>
<a name="/s:7RxSwift17GroupedObservableV3keyxvp"></a>
<a name="//apple_ref/swift/Property/key" class="dashAnchor"></a>
<a class="token" href="#/s:7RxSwift17GroupedObservableV3keyxvp">key</a>
</code>
</div>
<div class="height-container">
<div class="pointer-container"></div>
<section class="section">
<div class="pointer"></div>
<div class="abstract">
<p>The key associated with this grouped observable sequence.
All elements emitted by this observable share this common key.</p>
</div>
<div class="declaration">
<h4>Declaration</h4>
<div class="language">
<p class="aside-title">Swift</p>
<pre class="highlight swift"><code><span class="kd">public</span> <span class="k">let</span> <span class="nv">key</span><span class="p">:</span> <span class="kt">Key</span></code></pre>
</div>
</div>
</section>
</div>
</li>
<li class="item">
<div>
<code>
<a name="/s:7RxSwift17GroupedObservableV3key6sourceACyxq_Gx_AA0D0Cyq_Gtcfc"></a>
<a name="//apple_ref/swift/Method/init(key:source:)" class="dashAnchor"></a>
<a class="token" href="#/s:7RxSwift17GroupedObservableV3key6sourceACyxq_Gx_AA0D0Cyq_Gtcfc">init(key:<wbr>source:<wbr>)</a>
</code>
</div>
<div class="height-container">
<div class="pointer-container"></div>
<section class="section">
<div class="pointer"></div>
<div class="abstract">
<p>Initializes a grouped observable sequence with a key and a source observable sequence.</p>
<p>Example usage:</p>
<pre class="highlight swift"><code><span class="k">let</span> <span class="nv">sourceObservable</span> <span class="o">=</span> <span class="kt">Observable</span><span class="o">.</span><span class="nf">of</span><span class="p">(</span><span class="s">"Apple"</span><span class="p">,</span> <span class="s">"Apricot"</span><span class="p">,</span> <span class="s">"Avocado"</span><span class="p">)</span>
<span class="k">let</span> <span class="nv">groupedObservable</span> <span class="o">=</span> <span class="kt">GroupedObservable</span><span class="p">(</span><span class="nv">key</span><span class="p">:</span> <span class="s">"A"</span><span class="p">,</span> <span class="nv">source</span><span class="p">:</span> <span class="n">sourceObservable</span><span class="p">)</span>
<span class="n">_</span> <span class="o">=</span> <span class="n">groupedObservable</span><span class="o">.</span><span class="n">subscribe</span> <span class="p">{</span> <span class="n">event</span> <span class="k">in</span>
<span class="nf">print</span><span class="p">(</span><span class="n">event</span><span class="p">)</span>
<span class="p">}</span>
</code></pre>
<p>This will print:</p>
<pre class="highlight swift"><code><span class="nf">next</span><span class="p">(</span><span class="kt">Apple</span><span class="p">)</span>
<span class="nf">next</span><span class="p">(</span><span class="kt">Apricot</span><span class="p">)</span>
<span class="nf">next</span><span class="p">(</span><span class="kt">Avocado</span><span class="p">)</span>
</code></pre>
</div>
<div class="declaration">
<h4>Declaration</h4>
<div class="language">
<p class="aside-title">Swift</p>
<pre class="highlight swift"><code><span class="kd">public</span> <span class="nf">init</span><span class="p">(</span><span class="nv">key</span><span class="p">:</span> <span class="kt">Key</span><span class="p">,</span> <span class="nv">source</span><span class="p">:</span> <span class="kt"><a href="../Classes/Observable.html">Observable</a></span><span class="o"><</span><span class="kt">Element</span><span class="o">></span><span class="p">)</span></code></pre>
</div>
</div>
<div>
<h4>Parameters</h4>
<table class="graybox">
<tbody>
<tr>
<td>
<code>
<em>key</em>
</code>
</td>
<td>
<div>
<p>The key associated with this grouped observable sequence.</p>
</div>
</td>
</tr>
<tr>
<td>
<code>
<em>source</em>
</code>
</td>
<td>
<div>
<p>The observable sequence of elements for the specified key.</p>
</div>
</td>
</tr>
</tbody>
</table>
</div>
</section>
</div>
</li>
<li class="item">
<div>
<code>
<a name="/s:7RxSwift17GroupedObservableV9subscribeyAA10Disposable_pqd__7ElementQyd__Rs_AA12ObserverTypeRd__lF"></a>
<a name="//apple_ref/swift/Method/subscribe(_:)" class="dashAnchor"></a>
<a class="token" href="#/s:7RxSwift17GroupedObservableV9subscribeyAA10Disposable_pqd__7ElementQyd__Rs_AA12ObserverTypeRd__lF">subscribe(_:<wbr>)</a>
</code>
</div>
<div class="height-container">
<div class="pointer-container"></div>
<section class="section">
<div class="pointer"></div>
<div class="abstract">
<p>Subscribes an observer to receive events emitted by the source observable sequence.</p>
<p>Example usage:</p>
<pre class="highlight swift"><code><span class="k">let</span> <span class="nv">fruitsObservable</span> <span class="o">=</span> <span class="kt">Observable</span><span class="o">.</span><span class="nf">of</span><span class="p">(</span><span class="s">"Apple"</span><span class="p">,</span> <span class="s">"Banana"</span><span class="p">,</span> <span class="s">"Apricot"</span><span class="p">,</span> <span class="s">"Blueberry"</span><span class="p">,</span> <span class="s">"Avocado"</span><span class="p">)</span>
<span class="k">let</span> <span class="nv">grouped</span> <span class="o">=</span> <span class="n">fruitsObservable</span><span class="o">.</span><span class="n">groupBy</span> <span class="p">{</span> <span class="nv">$0</span><span class="o">.</span><span class="n">first</span><span class="o">!</span> <span class="p">}</span> <span class="c1">// Group by first letter</span>
<span class="n">_</span> <span class="o">=</span> <span class="n">grouped</span><span class="o">.</span><span class="n">subscribe</span> <span class="p">{</span> <span class="n">group</span> <span class="k">in</span>
<span class="k">if</span> <span class="n">group</span><span class="o">.</span><span class="n">key</span> <span class="o">==</span> <span class="s">"A"</span> <span class="p">{</span>
<span class="n">_</span> <span class="o">=</span> <span class="n">group</span><span class="o">.</span><span class="n">subscribe</span> <span class="p">{</span> <span class="n">event</span> <span class="k">in</span>
<span class="nf">print</span><span class="p">(</span><span class="n">event</span><span class="p">)</span>
<span class="p">}</span>
<span class="p">}</span>
<span class="p">}</span>
</code></pre>
<p>This will print:</p>
<pre class="highlight swift"><code><span class="nf">next</span><span class="p">(</span><span class="kt">Apple</span><span class="p">)</span>
<span class="nf">next</span><span class="p">(</span><span class="kt">Apricot</span><span class="p">)</span>
<span class="nf">next</span><span class="p">(</span><span class="kt">Avocado</span><span class="p">)</span>
</code></pre>
</div>
<div class="declaration">
<h4>Declaration</h4>
<div class="language">
<p class="aside-title">Swift</p>
<pre class="highlight swift"><code><span class="kd">public</span> <span class="kd">func</span> <span class="n">subscribe</span><span class="o"><</span><span class="kt">Observer</span><span class="o">></span><span class="p">(</span><span class="n">_</span> <span class="nv">observer</span><span class="p">:</span> <span class="kt">Observer</span><span class="p">)</span> <span class="o">-></span> <span class="kt"><a href="../Protocols/Disposable.html">Disposable</a></span> <span class="k">where</span> <span class="kt">Element</span> <span class="o">==</span> <span class="kt">Observer</span><span class="o">.</span><span class="kt">Element</span><span class="p">,</span> <span class="kt">Observer</span> <span class="p">:</span> <span class="kt"><a href="../Protocols/ObserverType.html">ObserverType</a></span></code></pre>
</div>
</div>
<div>
<h4>Parameters</h4>
<table class="graybox">
<tbody>
<tr>
<td>
<code>
<em>observer</em>
</code>
</td>
<td>
<div>
<p>The observer that will receive the events of the source observable.</p>
</div>
</td>
</tr>
</tbody>
</table>
</div>
<div>
<h4>Return Value</h4>
<p>A <code><a href="../Protocols/Disposable.html">Disposable</a></code> representing the subscription, which can be used to cancel the subscription.</p>
</div>
</section>
</div>
</li>
<li class="item">
<div>
<code>
<a name="/s:7RxSwift17GroupedObservableV02asD0AA0D0Cyq_GyF"></a>
<a name="//apple_ref/swift/Method/asObservable()" class="dashAnchor"></a>
<a class="token" href="#/s:7RxSwift17GroupedObservableV02asD0AA0D0Cyq_GyF">asObservable()</a>
</code>
</div>
<div class="height-container">
<div class="pointer-container"></div>
<section class="section">
<div class="pointer"></div>
<div class="abstract">
<p>Converts this <code>GroupedObservable</code> into a regular <code><a href="../Classes/Observable.html">Observable</a></code> sequence.
This allows you to work with the sequence without directly interacting with the key.</p>
<p>Example usage:</p>
<pre class="highlight swift"><code><span class="k">let</span> <span class="nv">fruitsObservable</span> <span class="o">=</span> <span class="kt">Observable</span><span class="o">.</span><span class="nf">of</span><span class="p">(</span><span class="s">"Apple"</span><span class="p">,</span> <span class="s">"Banana"</span><span class="p">,</span> <span class="s">"Apricot"</span><span class="p">,</span> <span class="s">"Blueberry"</span><span class="p">,</span> <span class="s">"Avocado"</span><span class="p">)</span>
<span class="k">let</span> <span class="nv">grouped</span> <span class="o">=</span> <span class="n">fruitsObservable</span><span class="o">.</span><span class="n">groupBy</span> <span class="p">{</span> <span class="nv">$0</span><span class="o">.</span><span class="n">first</span><span class="o">!</span> <span class="p">}</span> <span class="c1">// Group by first letter</span>
<span class="n">_</span> <span class="o">=</span> <span class="n">grouped</span><span class="o">.</span><span class="n">subscribe</span> <span class="p">{</span> <span class="n">group</span> <span class="k">in</span>
<span class="k">if</span> <span class="n">group</span><span class="o">.</span><span class="n">key</span> <span class="o">==</span> <span class="s">"A"</span> <span class="p">{</span>
<span class="k">let</span> <span class="nv">regularObservable</span> <span class="o">=</span> <span class="n">group</span><span class="o">.</span><span class="nf">asObservable</span><span class="p">()</span>
<span class="n">_</span> <span class="o">=</span> <span class="n">regularObservable</span><span class="o">.</span><span class="n">subscribe</span> <span class="p">{</span> <span class="n">event</span> <span class="k">in</span>
<span class="nf">print</span><span class="p">(</span><span class="n">event</span><span class="p">)</span>
<span class="p">}</span>
<span class="p">}</span>
<span class="p">}</span>
</code></pre>
<p>This will print:</p>
<pre class="highlight swift"><code><span class="nf">next</span><span class="p">(</span><span class="kt">Apple</span><span class="p">)</span>
<span class="nf">next</span><span class="p">(</span><span class="kt">Apricot</span><span class="p">)</span>
<span class="nf">next</span><span class="p">(</span><span class="kt">Avocado</span><span class="p">)</span>
</code></pre>
</div>
<div class="declaration">
<h4>Declaration</h4>
<div class="language">
<p class="aside-title">Swift</p>
<pre class="highlight swift"><code><span class="kd">public</span> <span class="kd">func</span> <span class="nf">asObservable</span><span class="p">()</span> <span class="o">-></span> <span class="kt"><a href="../Classes/Observable.html">Observable</a></span><span class="o"><</span><span class="kt">Element</span><span class="o">></span></code></pre>
</div>
</div>
<div>
<h4>Return Value</h4>
<p>The underlying <code><a href="../Classes/Observable.html">Observable</a></code> sequence of elements for the specified key.</p>
</div>
</section>
</div>
</li>
</ul>
</div>
</div>
</section>
</article>
</div>
<section class="footer">
<p>© 2024 <a class="link" href="https://github.com/ReactiveX/RxSwift" target="_blank" rel="external noopener">Shai Mishali and Krunoslav Zaher</a>. All rights reserved. (Last updated: 2024-10-06)</p>
<p>Generated by <a class="link" href="https://github.com/realm/jazzy" target="_blank" rel="external noopener">jazzy ♪♫ v0.14.4</a>, a <a class="link" href="https://realm.io" target="_blank" rel="external noopener">Realm</a> project.</p>
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