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diff --git a/files/it/web/javascript/reference/global_objects/array/includes/index.html b/files/it/web/javascript/reference/global_objects/array/includes/index.html deleted file mode 100644 index 04dc817974..0000000000 --- a/files/it/web/javascript/reference/global_objects/array/includes/index.html +++ /dev/null @@ -1,162 +0,0 @@ ---- -title: Array.prototype.includes() -slug: Web/JavaScript/Reference/Global_Objects/Array/includes -translation_of: Web/JavaScript/Reference/Global_Objects/Array/includes ---- -<div>{{JSRef}}</div> - -<p>Il metodo <code><strong>includes()</strong></code> determina se un array include un certo elemento, ritornando <code>true</code> o <code>false</code> a seconda del caso</p> - -<h2 id="Sintassi">Sintassi</h2> - -<pre class="syntaxbox">var <var>boolean</var> = <var>array</var>.includes(<var>searchElement</var>[, <var>fromIndex</var>])</pre> - -<h3 id="Parametri">Parametri</h3> - -<dl> - <dt><code>searchElement</code></dt> - <dd>L'elemento da cercare.</dd> - <dt><code>fromIndex</code></dt> - <dd>Opzionale. La posizione nell'array da cui partire per cercare l'elemento <code>searchElement</code>. Un valore negativo ricerca dal valore di <code>array.length + fromIndex</code> in maniera ascendente. Il valore di default è 0.</dd> -</dl> - -<h3 id="Valore_di_ritorno">Valore di ritorno</h3> - -<p>Un {{jsxref("Boolean")}}.</p> - -<h2 id="Examples">Examples</h2> - -<pre class="brush: js">[1, 2, 3].includes(2); // true -[1, 2, 3].includes(4); // false -[1, 2, 3].includes(3, 3); // false -[1, 2, 3].includes(3, -1); // true -[1, 2, NaN].includes(NaN); // true -</pre> - -<h2 id="Polyfill">Polyfill</h2> - -<pre class="brush: js">if (!Array.prototype.includes) { - Array.prototype.includes = function(searchElement /*, fromIndex*/) { - 'use strict'; - if (this == null) { - throw new TypeError('Array.prototype.includes called on null or undefined'); - } - - var O = Object(this); - var len = parseInt(O.length, 10) || 0; - if (len === 0) { - return false; - } - var n = parseInt(arguments[1], 10) || 0; - var k; - if (n >= 0) { - k = n; - } else { - k = len + n; - if (k < 0) {k = 0;} - } - var currentElement; - while (k < len) { - currentElement = O[k]; - if (searchElement === currentElement || - (searchElement !== searchElement && currentElement !== currentElement)) { // NaN !== NaN - return true; - } - k++; - } - return false; - }; -} -</pre> - -<h2 id="Specifications">Specifications</h2> - -<table class="standard-table"> - <tbody> - <tr> - <th scope="col">Specification</th> - <th scope="col">Status</th> - <th scope="col">Comment</th> - </tr> - <tr> - <td>{{SpecName('ES7', '#sec-array.prototype.includes', 'Array.prototype.includes')}}</td> - <td>{{Spec2('ES7')}}</td> - <td>Definizione iniziale.</td> - </tr> - <tr> - <td>{{SpecName('ESDraft', '#sec-array.prototype.includes', 'Array.prototype.includes')}}</td> - <td>{{Spec2('ESDraft')}}</td> - <td> </td> - </tr> - </tbody> -</table> - -<h2 id="Browser_compatibility">Browser compatibility</h2> - -<div>{{CompatibilityTable}}</div> - -<div id="compat-desktop"> -<table class="compat-table"> - <tbody> - <tr> - <th>Feature</th> - <th>Chrome</th> - <th>Firefox (Gecko)</th> - <th>Internet Explorer</th> - <th>Edge</th> - <th>Opera</th> - <th>Safari</th> - </tr> - <tr> - <td>Basic support</td> - <td> - <p>{{CompatChrome(47)}}</p> - </td> - <td>43</td> - <td>{{CompatNo}}</td> - <td>14279+</td> - <td>34</td> - <td>9</td> - </tr> - </tbody> -</table> -</div> - -<div id="compat-mobile"> -<table class="compat-table"> - <tbody> - <tr> - <th>Feature</th> - <th>Android</th> - <th>Android Webview</th> - <th>Firefox Mobile (Gecko)</th> - <th>IE Mobile</th> - <th>Opera Mobile</th> - <th>Safari Mobile</th> - <th>Chrome for Android</th> - </tr> - <tr> - <td>Basic support</td> - <td>{{CompatNo}}</td> - <td> - <p>{{CompatChrome(47)}}</p> - </td> - <td>43</td> - <td>{{CompatNo}}</td> - <td>34</td> - <td>9</td> - <td> - <p>{{CompatChrome(47)}}</p> - </td> - </tr> - </tbody> -</table> -</div> - -<h2 id="Vedi_anche">Vedi anche</h2> - -<ul> - <li>{{jsxref("TypedArray.prototype.includes()")}}</li> - <li>{{jsxref("String.prototype.includes()")}}</li> - <li>{{jsxref("Array.prototype.indexOf()")}}</li> -</ul> |