From cb9e359a51c3249d8f5157db69d43fd413ddeda6 Mon Sep 17 00:00:00 2001
From: Florian Merz <me@fiji-flo.de>
Date: Thu, 11 Feb 2021 14:45:12 +0100
Subject: unslug ca: move

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+---
+title: Array.prototype.keys()
+slug: Web/JavaScript/Referencia/Objectes_globals/Array/keys
+translation_of: Web/JavaScript/Reference/Global_Objects/Array/keys
+---
+<div>{{JSRef}}</div>
+
+<p>El mètode <code><strong>keys()</strong></code> retorna un nou <code><strong>Array Iterator</strong></code> que conté la clau de cada posició d'un array.</p>
+
+<h2 id="Sintaxi">Sintaxi</h2>
+
+<pre class="syntaxbox"><code><var>arr</var>.keys()</code></pre>
+
+<h2 id="Exemples">Exemples</h2>
+
+<h3 id="Ús_bàsic">Ús bàsic</h3>
+
+<pre class="brush: js">var arr = ["a", "b", "c"];
+var iterator = arr.keys();
+
+console.log(iterator.next()); // { value: 0, done: false }
+console.log(iterator.next()); // { value: 1, done: false }
+console.log(iterator.next()); // { value: 2, done: false }
+console.log(iterator.next()); // { value: undefined, done: true }
+</pre>
+
+<h3 id="L'iterador_de_claus_no_ignora_els_forats">L'iterador de claus no ignora els forats</h3>
+
+<pre class="brush: js">var arr = ["a", , "c"];
+var sparseKeys = Object.keys(arr);
+var denseKeys = [...arr.keys()];
+console.log(sparseKeys); // ['0', '2']
+console.log(denseKeys);  // [0, 1, 2]
+</pre>
+
+<h2 id="Especificacions">Especificacions</h2>
+
+<table class="standard-table">
+ <tbody>
+  <tr>
+   <th scope="col">Especificació</th>
+   <th scope="col">Estat</th>
+   <th scope="col">Comentaris</th>
+  </tr>
+  <tr>
+   <td>{{SpecName('ES6', '#sec-array.prototype.keys', 'Array.prototype.keys')}}</td>
+   <td>{{Spec2('ES6')}}</td>
+   <td>Definició inicial.</td>
+  </tr>
+  <tr>
+   <td>{{SpecName('ESDraft', '#sec-array.prototype.keys', 'Array.prototype.keys')}}</td>
+   <td>{{Spec2('ESDraft')}}</td>
+   <td> </td>
+  </tr>
+ </tbody>
+</table>
+
+<h2 id="Compatibilitat_amb_navegadors">Compatibilitat amb navegadors</h2>
+
+<div>{{CompatibilityTable}}</div>
+
+<div id="compat-desktop">
+<table class="compat-table">
+ <tbody>
+  <tr>
+   <th>Característica</th>
+   <th>Chrome</th>
+   <th>Firefox (Gecko)</th>
+   <th>Internet Explorer</th>
+   <th>Opera</th>
+   <th>Safari</th>
+  </tr>
+  <tr>
+   <td>Suport bàsic</td>
+   <td>{{CompatChrome("38")}}</td>
+   <td>{{CompatGeckoDesktop("28")}}</td>
+   <td>{{CompatNo}}</td>
+   <td>{{CompatOpera("25")}}</td>
+   <td>{{CompatSafari("7.1")}}</td>
+  </tr>
+ </tbody>
+</table>
+</div>
+
+<div id="compat-mobile">
+<table class="compat-table">
+ <tbody>
+  <tr>
+   <th>Característica</th>
+   <th>Android</th>
+   <th>Chrome for Android</th>
+   <th>Firefox Mobile (Gecko)</th>
+   <th>IE Mobile</th>
+   <th>Opera Mobile</th>
+   <th>Safari Mobile</th>
+  </tr>
+  <tr>
+   <td>Suport bàsic</td>
+   <td>{{CompatNo}}</td>
+   <td>{{CompatNo}}</td>
+   <td>{{CompatGeckoMobile("28")}}</td>
+   <td>{{CompatNo}}</td>
+   <td>{{CompatNo}}</td>
+   <td>8.0</td>
+  </tr>
+ </tbody>
+</table>
+</div>
+
+<h2 id="Vegeu_també">Vegeu també</h2>
+
+<ul>
+ <li>{{jsxref("Array.prototype.values()")}}</li>
+ <li>{{jsxref("Array.prototype.entries()")}}</li>
+</ul>
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