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authorPeter Bengtsson <mail@peterbe.com>2020-12-08 14:41:45 -0500
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+---
+title: Array
+slug: Web/JavaScript/Reference/Global_Objects/Array
+tags:
+ - Array
+ - Example
+ - Global Objects
+ - JavaScript
+ - NeedsTranslation
+ - Reference
+ - TopicStub
+translation_of: Web/JavaScript/Reference/Global_Objects/Array
+---
+<div>{{JSRef}}</div>
+
+<p>Tömbök, amelyek magas-szintű lista jellegű objektumok, létrehozásához használatos a JavaScript <strong><code>Array</code></strong> objektum.</p>
+
+<h2 id="Leírás">Leírás</h2>
+
+<p>A tömbök listaszerű objektumok amelyek prototípusa olyan metódusokat tartalmaz  amelyekkel bejárhatóak és mutálhatóak. A JavaScipt tömbnek sem a hossza, sem az elemeinek típusa sem fix. A tömbön belül az adatok nem folytonos módon tárolhatóak, így mivel a tömb hossza bármikor megváltozhat a Javascript tömbök sürűsége nem garantált, ez a programozó által választott felhasználási módtól függ. Általánosságban ezek kényelmes tulajdonságok de ha ezek a jellemzők nem kívánatosak az ön számára érdemes lehet inkább típusos tömböket használni. A tömbök nem használhatnak stringeket elem indexként (mint egy <a href="https://en.wikipedia.org/wiki/Associative_array">asszociatív tömbben</a>) csak kötelezően integereket. Ha a <a href="/en-US/docs/Web/JavaScript/Guide/Working_with_Objects#Objects_and_properties">zárójel jelölés</a> (vagy <a href="/en-US/docs/Web/JavaScript/Reference/Operators/Property_Accessors">pont jelölés</a>) segítségével nem-integert állítunk be vagy férünk hozzá akkor nem a tömb elemét fogjuk megkapni hanem a tömb <a href="/en-US/docs/Web/JavaScript/Data_structures#Properties">objektum tulajdonság kollekciójának</a> változóját. A tömb elemeinek listája és a tömb objektum tulajdonságai különböznek és a <a href="/en-US/docs/Web/JavaScript/Guide/Indexed_collections#Array_methods">tömb bejáró és mutáló operátorait</a> nem használhatjuk ezekhez az elnevezett tulajdonságokhoz.</p>
+
+<h3 id="Gyakori_műveletek">Gyakori műveletek</h3>
+
+<p><strong>Array létrehozása</strong></p>
+
+<pre class="brush: js">var fruits = ["Apple", "Banana"];
+
+console.log(fruits.length);
+// 2
+</pre>
+
+<p><strong>Egy Array elem elérése (indexelése)</strong></p>
+
+<pre class="brush: js">var first = fruits[0];
+// Apple
+
+var last = fruits[fruits.length - 1];
+// Banana
+</pre>
+
+<p><strong>Array bejárása</strong></p>
+
+<pre class="brush: js">fruits.forEach(function (item, index, array) {
+  console.log(item, index);
+});
+// Apple 0
+// Banana 1
+</pre>
+
+<p><strong>Hozzáadás egy Array végéhez</strong></p>
+
+<pre class="brush: js">var newLength = fruits.push("Orange");
+// ["Apple", "Banana", "Orange"]
+</pre>
+
+<p><strong>Array végéről elem eltávolítása</strong></p>
+
+<pre class="brush: js">var last = fruits.pop(); // Orange eltávolítása (a végéről)
+// ["Apple", "Banana"];
+</pre>
+
+<p><strong>Array elejéről elem eltávolítása</strong></p>
+
+<pre class="brush: js">var first = fruits.shift(); // eltávolítja az Apple elemet az elejéről
+// ["Banana"];
+</pre>
+
+<p><strong>Array elejéhez hozzáadás</strong></p>
+
+<pre class="brush: js">var newLength = fruits.unshift("Strawberry") // hozzáadás az elejéhez
+// ["Strawberry", "Banana"];
+</pre>
+
+<p><strong>Array elem indexének megkeresése </strong></p>
+
+<pre class="brush: js">fruits.push("Mango");
+// ["Strawberry", "Banana", "Mango"]
+
+var pos = fruits.indexOf("Banana");
+// 1
+</pre>
+
+<p><strong>Index pozició alapján elem eltávolítása</strong></p>
+
+<pre class="brush: js">var removedItem = fruits.splice(pos, 1); // így távolítunk el egy elemet
+
+// ["Strawberry", "Mango"]</pre>
+
+<p><strong>Index pozició alapján elemek eltávolítása</strong></p>
+
+<pre><code>let vegetables = ['Cabbage', 'Turnip', 'Radish', 'Carrot']
+console.log(vegetables)
+// ["Cabbage", "Turnip", "Radish", "Carrot"]
+
+let pos = 1
+let n = 2
+
+let removedItems = vegetables.splice(pos, n)
+// this is how to remove items, n defines the number of items to be removed,
+// from that position(pos) onward to the end of array.
+
+console.log(vegetables)
+// ["Cabbage", "Carrot"] (the original array is changed)
+
+console.log(removedItems)
+// ["Turnip", "Radish"]</code></pre>
+
+<p><strong>Array másolása</strong></p>
+
+<pre class="brush: js">var shallowCopy = fruits.slice(); // this is how to make a copy
+// ["Strawberry"]
+</pre>
+
+<h2 id="Syntax">Syntax</h2>
+
+<pre class="syntaxbox"><code>[<var>element0</var>, <var>element1</var>, ..., <var>elementN</var>]
+new Array(<var>element0</var>, <var>element1</var>[, ...[, <var>elementN</var>]])
+new Array(<var>arrayLength</var>)</code></pre>
+
+<h3 id="Parameters">Parameters</h3>
+
+<dl>
+ <dt><code>element<em>N</em></code></dt>
+ <dd>A JavaScript array is initialized with the given elements, except in the case where a single argument is passed to the <code>Array</code> constructor and that argument is a number (see the arrayLength parameter below). Note that this special case only applies to JavaScript arrays created with the <code>Array</code> constructor, not array literals created with the bracket syntax.</dd>
+ <dt><code>arrayLength</code></dt>
+ <dd>If the only argument passed to the <code>Array</code> constructor is an integer between 0 and 2<sup>32</sup>-1 (inclusive), this returns a new JavaScript array with length set to that number. If the argument is any other number, a {{jsxref("RangeError")}} exception is thrown.</dd>
+</dl>
+
+<h2 id="Description">Description</h2>
+
+<p>Arrays are list-like objects whose prototype has methods to perform traversal and mutation operations. Neither the length of a JavaScript array nor the types of its elements are fixed. Since an array's length can change at any time, and data can be stored at non-contiguous locations in the array, JavaScript arrays are not guaranteed to be dense; this depends on how the programmer chooses to use them. In general, these are convenient characteristics; but if these features are not desirable for your particular use, you might consider using typed arrays.</p>
+
+<p>Some people think that <a class="external" href="http://www.andrewdupont.net/2006/05/18/javascript-associative-arrays-considered-harmful/">you shouldn't use an array as an associative array</a>. In any case, you can use plain {{jsxref("Global_Objects/Object", "objects")}} instead, although doing so comes with its own caveats. See the post <a class="external" href="http://www.less-broken.com/blog/2010/12/lightweight-javascript-dictionaries.html">Lightweight JavaScript dictionaries with arbitrary keys</a> as an example.</p>
+
+<h3 id="Accessing_array_elements">Accessing array elements</h3>
+
+<p>JavaScript arrays are zero-indexed: the first element of an array is at index <code>0</code>, and the last element is at the index equal to the value of the array's {{jsxref("Array.length", "length")}} property minus 1.</p>
+
+<pre class="brush: js">var arr = ['this is the first element', 'this is the second element'];
+console.log(arr[0]); // logs 'this is the first element'
+console.log(arr[1]); // logs 'this is the second element'
+console.log(arr[arr.length - 1]); // logs 'this is the second element'
+</pre>
+
+<p>Array elements are object properties in the same way that <code>toString</code> is a property, but trying to access an element of an array as follows throws a syntax error, because the property name is not valid:</p>
+
+<pre class="brush: js">console.log(arr.0); // a syntax error
+</pre>
+
+<p>There is nothing special about JavaScript arrays and the properties that cause this. JavaScript properties that begin with a digit cannot be referenced with dot notation; and must be accessed using bracket notation. For example, if you had an object with a property named <code>'3d'</code>, it can only be referenced using bracket notation. E.g.:</p>
+
+<pre class="brush: js">var years = [1950, 1960, 1970, 1980, 1990, 2000, 2010];
+console.log(years.0); // a syntax error
+console.log(years[0]); // works properly
+</pre>
+
+<pre class="brush: js">renderer.3d.setTexture(model, 'character.png'); // a syntax error
+renderer['3d'].setTexture(model, 'character.png'); // works properly
+</pre>
+
+<p>Note that in the <code>3d</code> example, <code>'3d'</code> had to be quoted. It's possible to quote the JavaScript array indexes as well (e.g., <code>years['2']</code> instead of <code>years[2]</code>), although it's not necessary. The 2 in <code>years[2]</code> is coerced into a string by the JavaScript engine through an implicit <code>toString</code> conversion. It is for this reason that <code>'2'</code> and <code>'02'</code> would refer to two different slots on the <code>years</code> object and the following example could be <code>true</code>:</p>
+
+<pre class="brush: js">console.log(years['2'] != years['02']);
+</pre>
+
+<p>Similarly, object properties which happen to be reserved words(!) can only be accessed as string literals in bracket notation(but it can be accessed by dot notation in firefox 40.0a2 at least):</p>
+
+<pre class="brush: js">var promise = {
+ 'var' : 'text',
+ 'array': [1, 2, 3, 4]
+};
+
+console.log(promise['array']);
+</pre>
+
+<h3 id="Relationship_between_length_and_numerical_properties">Relationship between <code>length</code> and numerical properties</h3>
+
+<p>A JavaScript array's {{jsxref("Array.length", "length")}} property and numerical properties are connected. Several of the built-in array methods (e.g., {{jsxref("Array.join", "join")}}, {{jsxref("Array.slice", "slice")}}, {{jsxref("Array.indexOf", "indexOf")}}, etc.) take into account the value of an array's {{jsxref("Array.length", "length")}} property when they're called. Other methods (e.g., {{jsxref("Array.push", "push")}}, {{jsxref("Array.splice", "splice")}}, etc.) also result in updates to an array's {{jsxref("Array.length", "length")}} property.</p>
+
+<pre class="brush: js">var fruits = [];
+fruits.push('banana', 'apple', 'peach');
+
+console.log(fruits.length); // 3
+</pre>
+
+<p>When setting a property on a JavaScript array when the property is a valid array index and that index is outside the current bounds of the array, the engine will update the array's {{jsxref("Array.length", "length")}} property accordingly:</p>
+
+<pre class="brush: js">fruits[5] = 'mango';
+console.log(fruits[5]); // 'mango'
+console.log(Object.keys(fruits)); // ['0', '1', '2', '5']
+console.log(fruits.length); // 6
+</pre>
+
+<p>Increasing the {{jsxref("Array.length", "length")}}.</p>
+
+<pre class="brush: js">fruits.length = 10;
+console.log(Object.keys(fruits)); // ['0', '1', '2', '5']
+console.log(fruits.length); // 10
+</pre>
+
+<p>Decreasing the {{jsxref("Array.length", "length")}} property does, however, delete elements.</p>
+
+<pre class="brush: js">fruits.length = 2;
+console.log(Object.keys(fruits)); // ['0', '1']
+console.log(fruits.length); // 2
+</pre>
+
+<p>This is explained further on the {{jsxref("Array.length")}} page.</p>
+
+<h3 id="Creating_an_array_using_the_result_of_a_match">Creating an array using the result of a match</h3>
+
+<p>The result of a match between a regular expression and a string can create a JavaScript array. This array has properties and elements which provide information about the match. Such an array is returned by {{jsxref("RegExp.exec")}}, {{jsxref("String.match")}}, and {{jsxref("String.replace")}}. To help explain these properties and elements, look at the following example and then refer to the table below:</p>
+
+<pre class="brush: js">// Match one d followed by one or more b's followed by one d
+// Remember matched b's and the following d
+// Ignore case
+
+var myRe = /d(b+)(d)/i;
+var myArray = myRe.exec('cdbBdbsbz');
+</pre>
+
+<p>The properties and elements returned from this match are as follows:</p>
+
+<table class="fullwidth-table">
+ <tbody>
+ <tr>
+ <td class="header">Property/Element</td>
+ <td class="header">Description</td>
+ <td class="header">Example</td>
+ </tr>
+ <tr>
+ <td><code>input</code></td>
+ <td>A read-only property that reflects the original string against which the regular expression was matched.</td>
+ <td>cdbBdbsbz</td>
+ </tr>
+ <tr>
+ <td><code>index</code></td>
+ <td>A read-only property that is the zero-based index of the match in the string.</td>
+ <td>1</td>
+ </tr>
+ <tr>
+ <td><code>[0]</code></td>
+ <td>A read-only element that specifies the last matched characters.</td>
+ <td>dbBd</td>
+ </tr>
+ <tr>
+ <td><code>[1], ...[n]</code></td>
+ <td>Read-only elements that specify the parenthesized substring matches, if included in the regular expression. The number of possible parenthesized substrings is unlimited.</td>
+ <td>[1]: bB<br>
+ [2]: d</td>
+ </tr>
+ </tbody>
+</table>
+
+<h2 id="Properties">Properties</h2>
+
+<dl>
+ <dt><code>Array.length</code></dt>
+ <dd>The <code>Array</code> constructor's length property whose value is 1.</dd>
+ <dt>{{jsxref("Array.@@species", "get Array[@@species]")}}</dt>
+ <dd>The constructor function that is used to create derived objects.</dd>
+ <dt>{{jsxref("Array.prototype")}}</dt>
+ <dd>Allows the addition of properties to all array objects.</dd>
+</dl>
+
+<h2 id="Methods">Methods</h2>
+
+<dl>
+ <dt>{{jsxref("Array.from()")}}</dt>
+ <dd>Creates a new <code>Array</code> instance from an array-like or iterable object.</dd>
+ <dt>{{jsxref("Array.isArray()")}}</dt>
+ <dd>Returns true if a variable is an array, if not false.</dd>
+ <dt>{{jsxref("Array.of()")}}</dt>
+ <dd>Creates a new <code>Array</code> instance with a variable number of arguments, regardless of number or type of the arguments.</dd>
+</dl>
+
+<h2 id="Array_instances"><code>Array</code> instances</h2>
+
+<p>All <code>Array</code> instances inherit from {{jsxref("Array.prototype")}}. The prototype object of the <code>Array</code> constructor can be modified to affect all <code>Array</code> instances.</p>
+
+<h3 id="Properties_2">Properties</h3>
+
+<div>{{page('/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/prototype', 'Properties')}}</div>
+
+<h3 id="Methods_2">Methods</h3>
+
+<h4 id="Mutator_methods">Mutator methods</h4>
+
+<div>{{page('en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/prototype', 'Mutator_methods')}}</div>
+
+<h4 id="Accessor_methods">Accessor methods</h4>
+
+<div>{{page('en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/prototype', 'Accessor_methods')}}</div>
+
+<h4 id="Iteration_methods">Iteration methods</h4>
+
+<div>{{page('en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/prototype', 'Iteration_methods')}}</div>
+
+<h2 id="Array_generic_methods"><code>Array</code> generic methods</h2>
+
+<div class="warning">
+<p><strong>Array generics are non-standard, deprecated and will get removed in the near future</strong>. Note that you can not rely on them cross-browser. However, there is a <a href="https://github.com/plusdude/array-generics">shim available on GitHub</a>.</p>
+</div>
+
+<p>Sometimes you would like to apply array methods to strings or other array-like objects (such as function {{jsxref("Functions/arguments", "arguments", "", 1)}}). By doing this, you treat a string as an array of characters (or otherwise treat a non-array as an array). For example, in order to check that every character in the variable <var>str</var> is a letter, you would write:</p>
+
+<pre class="brush: js">function isLetter(character) {
+ return character &gt;= 'a' &amp;&amp; character &lt;= 'z';
+}
+
+if (Array.prototype.every.call(str, isLetter)) {
+ console.log("The string '" + str + "' contains only letters!");
+}
+</pre>
+
+<p>This notation is rather wasteful and JavaScript 1.6 introduced a generic shorthand:</p>
+
+<pre class="brush: js">if (Array.every(str, isLetter)) {
+ console.log("The string '" + str + "' contains only letters!");
+}
+</pre>
+
+<p>{{jsxref("Global_Objects/String", "Generics", "#String_generic_methods", 1)}} are also available on {{jsxref("String")}}.</p>
+
+<p>These are <strong>not</strong> part of ECMAScript standards (though the ES2015 {{jsxref("Array.from()")}} can be used to achieve this). The following is a shim to allow its use in all browsers:</p>
+
+<pre class="brush: js">// Assumes Array extras already present (one may use polyfills for these as well)
+(function() {
+ 'use strict';
+
+ var i,
+ // We could also build the array of methods with the following, but the
+ // getOwnPropertyNames() method is non-shimable:
+ // Object.getOwnPropertyNames(Array).filter(function(methodName) {
+ // return typeof Array[methodName] === 'function'
+ // });
+ methods = [
+ 'join', 'reverse', 'sort', 'push', 'pop', 'shift', 'unshift',
+ 'splice', 'concat', 'slice', 'indexOf', 'lastIndexOf',
+ 'forEach', 'map', 'reduce', 'reduceRight', 'filter',
+ 'some', 'every', 'find', 'findIndex', 'entries', 'keys',
+  'values', 'copyWithin', 'includes'
+ ],
+ methodCount = methods.length,
+ assignArrayGeneric = function(methodName) {
+ if (!Array[methodName]) {
+ var method = Array.prototype[methodName];
+ if (typeof method === 'function') {
+ Array[methodName] = function() {
+ return method.call.apply(method, arguments);
+ };
+ }
+ }
+ };
+
+ for (i = 0; i &lt; methodCount; i++) {
+ assignArrayGeneric(methods[i]);
+ }
+}());
+</pre>
+
+<h2 id="Examples">Examples</h2>
+
+<h3 id="Creating_an_array">Creating an array</h3>
+
+<p>The following example creates an array, <code>msgArray</code>, with a length of 0, then assigns values to <code>msgArray[0]</code> and <code>msgArray[99]</code>, changing the length of the array to 100.</p>
+
+<pre class="brush: js">var msgArray = [];
+msgArray[0] = 'Hello';
+msgArray[99] = 'world';
+
+if (msgArray.length === 100) {
+ console.log('The length is 100.');
+}
+</pre>
+
+<h3 id="Creating_a_two-dimensional_array">Creating a two-dimensional array</h3>
+
+<p>The following creates a chess board as a two dimensional array of strings. The first move is made by copying the 'p' in (6,4) to (4,4). The old position (6,4) is made blank.</p>
+
+<pre class="brush: js">var board = [
+ ['R','N','B','Q','K','B','N','R'],
+ ['P','P','P','P','P','P','P','P'],
+ [' ',' ',' ',' ',' ',' ',' ',' '],
+ [' ',' ',' ',' ',' ',' ',' ',' '],
+ [' ',' ',' ',' ',' ',' ',' ',' '],
+ [' ',' ',' ',' ',' ',' ',' ',' '],
+ ['p','p','p','p','p','p','p','p'],
+ ['r','n','b','q','k','b','n','r'] ];
+
+console.log(board.join('\n') + '\n\n');
+
+// Move King's Pawn forward 2
+board[4][4] = board[6][4];
+board[6][4] = ' ';
+console.log(board.join('\n'));
+</pre>
+
+<p>Here is the output:</p>
+
+<pre class="eval">R,N,B,Q,K,B,N,R
+P,P,P,P,P,P,P,P
+ , , , , , , ,
+ , , , , , , ,
+ , , , , , , ,
+ , , , , , , ,
+p,p,p,p,p,p,p,p
+r,n,b,q,k,b,n,r
+
+R,N,B,Q,K,B,N,R
+P,P,P,P,P,P,P,P
+ , , , , , , ,
+ , , , , , , ,
+ , , , ,p, , ,
+ , , , , , , ,
+p,p,p,p, ,p,p,p
+r,n,b,q,k,b,n,r
+</pre>
+
+<h3 id="Using_an_array_to_tabulate_a_set_of_values">Using an array to tabulate a set of values</h3>
+
+<pre class="brush: js">values=[];
+for (x=0; x&lt;10; x++){
+ values.push([
+ 2**x,
+ 2*x**2
+ ])
+};
+console.table(values)</pre>
+
+<p>Results in</p>
+
+<pre class="eval">0 1 0
+1 2 2
+2 4 8
+3 8 18
+4 16 32
+5 32 50
+6 64 72
+7 128 98
+8 256 128
+9 512 162</pre>
+
+<p>(First column is the (index))</p>
+
+<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('ES1')}}</td>
+ <td>{{Spec2('ES1')}}</td>
+ <td>Initial definition.</td>
+ </tr>
+ <tr>
+ <td>{{SpecName('ES5.1', '#sec-15.4', 'Array')}}</td>
+ <td>{{Spec2('ES5.1')}}</td>
+ <td>New methods added: {{jsxref("Array.isArray")}}, {{jsxref("Array.prototype.indexOf", "indexOf")}}, {{jsxref("Array.prototype.lastIndexOf", "lastIndexOf")}}, {{jsxref("Array.prototype.every", "every")}}, {{jsxref("Array.prototype.some", "some")}}, {{jsxref("Array.prototype.forEach", "forEach")}}, {{jsxref("Array.prototype.map", "map")}}, {{jsxref("Array.prototype.filter", "filter")}}, {{jsxref("Array.prototype.reduce", "reduce")}}, {{jsxref("Array.prototype.reduceRight", "reduceRight")}}</td>
+ </tr>
+ <tr>
+ <td>{{SpecName('ES6', '#sec-array-objects', 'Array')}}</td>
+ <td>{{Spec2('ES6')}}</td>
+ <td>New methods added: {{jsxref("Array.from")}}, {{jsxref("Array.of")}}, {{jsxref("Array.prototype.find", "find")}}, {{jsxref("Array.prototype.findIndex", "findIndex")}}, {{jsxref("Array.prototype.fill", "fill")}}, {{jsxref("Array.prototype.copyWithin", "copyWithin")}}</td>
+ </tr>
+ <tr>
+ <td>{{SpecName('ESDraft', '#sec-array-objects', 'Array')}}</td>
+ <td>{{Spec2('ESDraft')}}</td>
+ <td>New method added: {{jsxref("Array.prototype.includes()")}}</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>Opera</th>
+ <th>Safari</th>
+ </tr>
+ <tr>
+ <td>Basic support</td>
+ <td>{{CompatVersionUnknown}}</td>
+ <td>{{CompatVersionUnknown}}</td>
+ <td>{{CompatVersionUnknown}}</td>
+ <td>{{CompatVersionUnknown}}</td>
+ <td>{{CompatVersionUnknown}}</td>
+ </tr>
+ </tbody>
+</table>
+</div>
+
+<div id="compat-mobile">
+<table class="compat-table">
+ <tbody>
+ <tr>
+ <th>Feature</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>Basic support</td>
+ <td>{{CompatVersionUnknown}}</td>
+ <td>{{CompatVersionUnknown}}</td>
+ <td>{{CompatVersionUnknown}}</td>
+ <td>{{CompatVersionUnknown}}</td>
+ <td>{{CompatVersionUnknown}}</td>
+ <td>{{CompatVersionUnknown}}</td>
+ </tr>
+ </tbody>
+</table>
+</div>
+
+<h2 id="See_also">See also</h2>
+
+<ul>
+ <li><a href="/en-US/docs/Web/JavaScript/Guide/Working_with_Objects#Indexing_object_properties">JavaScript Guide: “Indexing object properties”</a></li>
+ <li><a href="/en-US/docs/Web/JavaScript/Guide/Predefined_Core_Objects#Array_Object">JavaScript Guide: “Predefined Core Objects: <code>Array</code> Object”</a></li>
+ <li><a href="/en-US/docs/Web/JavaScript/Reference/Operators/Array_comprehensions">Array comprehensions</a></li>
+ <li><a href="https://github.com/plusdude/array-generics">Polyfill for JavaScript 1.8.5 Array Generics and ECMAScript 5 Array Extras</a></li>
+ <li><a href="/en-US/docs/JavaScript_typed_arrays">Typed Arrays</a></li>
+</ul>
diff --git a/files/hu/web/javascript/reference/global_objects/array/keys/index.html b/files/hu/web/javascript/reference/global_objects/array/keys/index.html
new file mode 100644
index 0000000000..2f7c0cebef
--- /dev/null
+++ b/files/hu/web/javascript/reference/global_objects/array/keys/index.html
@@ -0,0 +1,77 @@
+---
+title: Array.prototype.keys()
+slug: Web/JavaScript/Reference/Global_Objects/Array/keys
+tags:
+ - ECMAScript 2015
+ - Iterator
+ - JavaScript
+ - Prototype
+ - kulcs
+ - metódus
+ - tömb
+translation_of: Web/JavaScript/Reference/Global_Objects/Array/keys
+---
+<div>{{JSRef}}</div>
+
+<p>A <code><strong>keys()</strong></code> metódus egy új <code><strong>Array Iterator</strong></code> objektummal tér vissza, amely a tömb indexeihez tartozó kulcsokat tartalmazza.</p>
+
+<div>{{EmbedInteractiveExample("pages/js/array-keys.html")}}</div>
+
+<p class="hidden">Az ehhez az interaktív példához tartozó forrás egy GitHub repozitoriban található. Ha szeretnél közreműködni az interaktív példa projektben, kérjük, klónozd a <a href="https://github.com/mdn/interactive-examples">https://github.com/mdn/interactive-examples</a> repozitorit és küldj egy pull request-et.</p>
+
+<h2 id="Szintaxis">Szintaxis</h2>
+
+<pre class="syntaxbox"><var>arr</var>.keys()</pre>
+
+<h3 id="Visszatérési_érték">Visszatérési érték</h3>
+
+<p>Egy új {{jsxref("Array")}} iterátor objektum.</p>
+
+<h2 id="Példák">Példák</h2>
+
+<h3 id="A_kulcs_iterátor_nem_hagyja_figyelmen_kívül_az_üres_helyeket">A kulcs iterátor nem hagyja figyelmen kívül az üres helyeket</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="Specifikációk">Specifikációk</h2>
+
+<table class="standard-table">
+ <tbody>
+ <tr>
+ <th scope="col">Specifikáció</th>
+ <th scope="col">Státusz</th>
+ <th scope="col">Megjegyzés</th>
+ </tr>
+ <tr>
+ <td>{{SpecName('ES2015', '#sec-array.prototype.keys', 'Array.prototype.keys')}}</td>
+ <td>{{Spec2('ES2015')}}</td>
+ <td>Kezdeti definíció.</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="Böngésző_kompatibilitás">Böngésző kompatibilitás</h2>
+
+<div>
+<div class="hidden">Az itt található kompatibilitási táblázat struktúrált adatok alapján lett létrehozva. Ha szeretnél hozzájárulni az adatokhoz, akkor töltsd le a <a href="https://github.com/mdn/browser-compat-data">https://github.com/mdn/browser-compat-data</a> repozitorit, és küldj egy pull request-et.</div>
+
+<p>{{Compat("javascript.builtins.Array.keys")}}</p>
+</div>
+
+<h2 id="Lásd_még">Lásd még</h2>
+
+<ul>
+ <li>{{jsxref("Array.prototype.values()")}}</li>
+ <li>{{jsxref("Array.prototype.entries()")}}</li>
+ <li><a href="/en-US/docs/Web/JavaScript/Reference/Iteration_protocols">Iterációs protokollok</a></li>
+</ul>
diff --git a/files/hu/web/javascript/reference/global_objects/array/of/index.html b/files/hu/web/javascript/reference/global_objects/array/of/index.html
new file mode 100644
index 0000000000..ff3af4288a
--- /dev/null
+++ b/files/hu/web/javascript/reference/global_objects/array/of/index.html
@@ -0,0 +1,94 @@
+---
+title: Array.of()
+slug: Web/JavaScript/Reference/Global_Objects/Array/of
+tags:
+ - tömb
+translation_of: Web/JavaScript/Reference/Global_Objects/Array/of
+---
+<div>{{JSRef}}</div>
+
+<p>Az <code><strong>Array.of()</strong></code> metódus egy új <code>Array</code> példányt hoz létre változó számú argumentumokból, azok számától és típusától függetlenül.</p>
+
+<p>Az <code><strong>Array.of()</strong></code> és az <code><strong>Array</strong></code> konstruktor működése között az a különbség, hogy máshogy hasznája az argumentumként megadott egész számokat: az <code><strong>Array.of(7)</strong></code> létrehoz egy új tömböt, melynek az egyetlen eleme a <code>7</code>, ezzel szemben az <code><strong>Array(7)</strong></code> egy olyan üres tömböt hoz létre, melynek a <code>length</code> property-je: 7 (<strong>Megjegyzés:</strong> ez valójában egy <code>7</code> üres elemű (empty) tömböt jelent, nem olyat, melynek az elemei ténylegesen <code>undefined</code> értékeket tartalmaznának).</p>
+
+<pre class="brush: js">Array.of(7); // [7]
+Array.of(1, 2, 3); // [1, 2, 3]
+
+Array(7); // 7 üres elemű tömb: [empty × 7]
+Array(1, 2, 3); // [1, 2, 3]
+</pre>
+
+<h2 id="Szintakszis">Szintakszis</h2>
+
+<pre class="syntaxbox">Array.of(<var>elem0</var>[, <var>elem1</var>[, ...[, <var>elemN</var>]]])</pre>
+
+<h3 id="Paraméterek">Paraméterek</h3>
+
+<dl>
+ <dt><code>elem<em>N</em></code></dt>
+ <dd>Elemek, melyeket a tömb tartalmazni fog</dd>
+</dl>
+
+<h3 id="Visszatérési_érték">Visszatérési érték</h3>
+
+<p>Egy új {{jsxref("Array")}} példány.</p>
+
+<h2 id="Leírás">Leírás</h2>
+
+<p>Ez a függvény szabványos az ECMAScript 2015 óta. További részletekért lásd az <a href="https://gist.github.com/rwaldron/1074126"><code>Array.of</code> és az <code>Array.from</code> proposal</a>-t és a <a href="https://gist.github.com/rwaldron/3186576"><code>Array.of</code> polyfill</a>-t.</p>
+
+<h2 id="Példák">Példák</h2>
+
+<pre class="brush: js">Array.of(1); // [1]
+Array.of(1, 2, 3); // [1, 2, 3]
+Array.of(undefined); // [undefined]
+</pre>
+
+<h2 id="Polyfill">Polyfill</h2>
+
+<p>A következő kód lefuttatása után az <code>Array.of()</code> hasznáható lesz, amennyiben a kliens ezt natíven nem támogatja.</p>
+
+<pre class="brush: js">if (!Array.of) {
+ Array.of = function() {
+ return Array.prototype.slice.call(arguments);
+ };
+}
+</pre>
+
+<h2 id="Specifikációk">Specifikációk</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('ES2015', '#sec-array.of', 'Array.of')}}</td>
+ <td>{{Spec2('ES2015')}}</td>
+ <td>Kezdeti definíció.</td>
+ </tr>
+ <tr>
+ <td>{{SpecName('ESDraft', '#sec-array.of', 'Array.of')}}</td>
+ <td>{{Spec2('ESDraft')}}</td>
+ <td></td>
+ </tr>
+ </tbody>
+</table>
+
+<h2 id="Böngésző_kompatibilitás">Böngésző kompatibilitás</h2>
+
+<div>
+<div class="hidden">A kompatibilitási táblázat ezen az oldalon struktúrált adatokból generált. Amennyiben hozzá kívánsz járulni ezen adatok frissítéséhez, kérlek látogasd meg a <a href="https://github.com/mdn/browser-compat-data">https://github.com/mdn/browser-compat-data</a> repository-t és küldj nekünk egy pull requestet.</div>
+
+<p>{{Compat("javascript.builtins.Array.of")}}</p>
+</div>
+
+<h2 id="Lásd_még">Lásd még:</h2>
+
+<ul>
+ <li>{{jsxref("Array")}}</li>
+ <li>{{jsxref("Array.from()")}}</li>
+ <li>{{jsxref("TypedArray.of()")}}</li>
+</ul>
diff --git a/files/hu/web/javascript/reference/global_objects/array/sort/index.html b/files/hu/web/javascript/reference/global_objects/array/sort/index.html
new file mode 100644
index 0000000000..408507ddd8
--- /dev/null
+++ b/files/hu/web/javascript/reference/global_objects/array/sort/index.html
@@ -0,0 +1,294 @@
+---
+title: Array.prototype.sort()
+slug: Web/JavaScript/Reference/Global_Objects/Array/sort
+tags:
+ - Prototípus
+ - Rendezés
+ - metódus
+ - tömb
+translation_of: Web/JavaScript/Reference/Global_Objects/Array/sort
+---
+<div>{{JSRef}}</div>
+
+<p>A <code><strong>sort()</strong></code> eljárás  egy tömb elemeit rendezi <em>helyben, és visszaadja a tömböt.</em> Egy rendezés nem teljesen <a href="https://en.wikipedia.org/wiki/Sorting_algorithm#Stability">stabil</a>. Az alapértelmezett rendezési sorrend függ a sztring Unicode táblában való elhelyezkedésétől.</p>
+
+<pre class="brush: js">var fruits = ['cherries', 'apples', 'banana'];
+fruits.sort(); // ['apple', 'banana', 'cherries']
+
+var scores = [1, 10, 21, 2];
+scores.sort(); // [1, 10, 2, 21]
+// Figyeld meg,hogy a 10 a 2 előtt jön,
+// mivel a '10' hamarabb van,mint '2' a Unicode sorolás szerint.
+
+var things = ['word', 'Word', '1 Word', '2 Words'];
+things.sort(); // ['1 Word', '2 Words', 'Word', 'word']
+// A Unicode-ban, a számok hamarabb kerülnek sorra mint a nagybetűk,
+// de, azok hamarabb vannak,mint a kisbetűk.
+</pre>
+
+<h2 id="Szintaxis">Szintaxis</h2>
+
+<pre class="syntaxbox"><em>arr</em>.sort() <em>arr</em>.sort(<var>compareFunction</var>)
+</pre>
+
+<h3 id="Paraméterek">Paraméterek</h3>
+
+<dl>
+ <dt><code>compareFunction</code> {{optional_inline}}</dt>
+ <dd>Meghatároz egy függvényt, amely definiálja  a rendezési sorrendet. Ha elhagyjuk, a tömb rendezése az egyes betűk <a href="https://developer.mozilla.org/hu/docs/Web/JavaScript/Guide/Grammar_and_types">Unicode</a> táblában való elhelyezkedése alapján történik meg.</dd>
+</dl>
+
+<h3 id="Visszatérési_érték">Visszatérési érték</h3>
+
+<p>A rendezett tömb. Vegyük figyelembe, hogy a rendezés helyben történt és nem készült másolat a tömbről.</p>
+
+<h2 id="Leírás">Leírás</h2>
+
+<p><code>Ha a compareFunction</code> nem mellékelt, akkor az elemek rendezése úgy zajlik, hogy először átkonvertálja sztringgé, majd összehasonlítja a Unicode karakter sorrendet. Például, "Banana" hamarabb lesz,mint "cherry". Szám-sorrendben a 9 hamarabb lesz 80-nál, de mivel a számok átkonvertálódnak sztringgé, "80" hamarabb lesz "9"-nél a Unicode sorolás szerint.</p>
+
+<p>Ha <code>compareFunction</code> mellékelt, a tömb elemei rendezésre kerülnek az összehasonlító függvény visszatérési értéke alapján. Ha a és b elemek összehasonlításra kerülnek:</p>
+
+<ul>
+ <li>Ha <code>compareFunction(a, b)</code> kisebb mint 0, akkor a kisebb indexet kap,mint <code>b</code>, szóval a előre kerül.</li>
+ <li>Ha <code>compareFunction(a, b)</code> 0-t ad vissza, akkor a-t és b-t  hagyjuk változatlanul,de a többi elemet rendezzük. Megjegyzés: az ECMAscript szabvány nem garantálja ezt a viselkedést,és hogy nem minden böngésző (például: Mozilla verziók,melyek 2003 körüliek) támogatja.</li>
+ <li>Ha <code>compareFunction(a, b)</code> nagyobb mint 0, rendezze b-t kisebb indexre mint a.</li>
+ <li><code>compareFunction(a, b)</code> mindig ugyanazt az értéket kellene visszaadja, amikor a jellemző a-b párost kapja meg paraméterként. Ha következetlen értéket ad vissza, akkor a rendezési sorrend "undefined".</li>
+</ul>
+
+<p>Szóval, az összehasonlító függvény így néz ki:</p>
+
+<pre class="brush: js">function compare(a, b) {
+ if (a kisebb mint b a sorrend kritéria szerint) {
+ return -1;
+ }
+ if (a nagyobb mint b a sorrend kritéria szerint) {
+ return 1;
+ }
+ // a-nak egyenlőnek kell lennie b-vel
+ return 0;
+}
+</pre>
+
+<p>To compare numbers instead of strings, the compare function can simply subtract <code>b</code> from <code>a</code>. The following function will sort the array ascending (if it doesn't contain <code>Infinity</code> and <code>NaN</code>):</p>
+
+<pre class="brush: js">function compareNumbers(a, b) {
+ return a - b;
+}
+</pre>
+
+<p>The <code>sort</code> method can be conveniently used with {{jsxref("Operators/function", "function expressions", "", 1)}} (and <a href="/en-US/docs/Web/JavaScript/Guide/Closures">closures</a>):</p>
+
+<pre class="brush: js">var numbers = [4, 2, 5, 1, 3];
+numbers.sort(function(a, b) {
+ return a - b;
+});
+console.log(numbers);
+
+// [1, 2, 3, 4, 5]
+</pre>
+
+<p>Objektumok is rendezhetőek, ha megadjuk az egyik tulajdonságát.</p>
+
+<pre class="brush: js">var items = [
+ { name: 'Edward', value: 21 },
+ { name: 'Sharpe', value: 37 },
+ { name: 'And', value: 45 },
+ { name: 'The', value: -12 },
+ { name: 'Magnetic', value: 13 },
+ { name: 'Zeros', value: 37 }
+];
+
+// sort by value
+items.sort(function (a, b) {
+ return a.value - b.value;
+});
+
+// sort by name
+items.sort(function(a, b) {
+ var nameA = a.name.toUpperCase(); // nagybetűk és kisbetűk elhagyása
+ var nameB = b.name.toUpperCase(); // nagybetűk és kisbetűk elhagyása
+  if (nameA &lt; nameB) {
+ return -1;
+  }
+  if (nameA &gt; nameB) {
+ return 1;
+  }
+
+  // a neveknek egyeznie kell
+  return 0;
+});</pre>
+
+<h2 id="Példák">Példák</h2>
+
+<h3 id="Tömbök_készítésemegjelenítése_és_rendezése">Tömbök készítése,megjelenítése és rendezése</h3>
+
+<p>A következő példa négy tömböt készít, megjeleníti az eredeti tömböt, majd a rendezett tömböket. A numerikus tömbök először nem,azután használva a compare függvényt rendezésre kerülnek.</p>
+
+<pre class="brush: js">var stringArray = ['Blue', 'Humpback', 'Beluga'];
+var numericStringArray = ['80', '9', '700'];
+var numberArray = [40, 1, 5, 200];
+var mixedNumericArray = ['80', '9', '700', 40, 1, 5, 200];
+
+function compareNumbers(a, b) {
+ return a - b;
+}
+
+console.log('stringArray:', stringArray.join());
+console.log('Sorted:', stringArray.sort());
+
+console.log('numberArray:', numberArray.join());
+console.log('Sorted without a compare function:', numberArray.sort());
+console.log('Sorted with compareNumbers:', numberArray.sort(compareNumbers));
+
+console.log('numericStringArray:', numericStringArray.join());
+console.log('Sorted without a compare function:', numericStringArray.sort());
+console.log('Sorted with compareNumbers:', numericStringArray.sort(compareNumbers));
+
+console.log('mixedNumericArray:', mixedNumericArray.join());
+console.log('Sorted without a compare function:', mixedNumericArray.sort());
+console.log('Sorted with compareNumbers:', mixedNumericArray.sort(compareNumbers));
+</pre>
+
+<p>This example produces the following output. As the output shows, when a compare function is used, numbers sort correctly whether they are numbers or numeric strings.</p>
+
+<pre>stringArray: Blue,Humpback,Beluga
+Sorted: Beluga,Blue,Humpback
+
+numberArray: 40,1,5,200
+Sorted without a compare function: 1,200,40,5
+Sorted with compareNumbers: 1,5,40,200
+
+numericStringArray: 80,9,700
+Sorted without a compare function: 700,80,9
+Sorted with compareNumbers: 9,80,700
+
+mixedNumericArray: 80,9,700,40,1,5,200
+Sorted without a compare function: 1,200,40,5,700,80,9
+Sorted with compareNumbers: 1,5,9,40,80,200,700
+</pre>
+
+<h3 id="Nem-ASCII_karakterek_rendezése">Nem-ASCII karakterek rendezése</h3>
+
+<p>For sorting strings with non-ASCII characters, i.e. strings with accented characters (e, é, è, a, ä, etc.), strings from languages other than English: use {{jsxref("String.localeCompare")}}. This function can compare those characters so they appear in the right order.</p>
+
+<pre class="brush: js">var items = ['réservé', 'premier', 'cliché', 'communiqué', 'café', 'adieu'];
+items.sort(function (a, b) {
+ return a.localeCompare(b);
+});
+
+// items is ['adieu', 'café', 'cliché', 'communiqué', 'premier', 'réservé']
+</pre>
+
+<h3 id="Rendezés_map-al">Rendezés map-al</h3>
+
+<p>The <code>compareFunction</code> can be invoked multiple times per element within the array. Depending on the <code>compareFunction</code>'s nature, this may yield a high overhead. The more work a <code>compareFunction</code> does and the more elements there are to sort, the wiser it may be to consider using a <a href="/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/map">map</a> for sorting. The idea is to walk the array once to extract the actual values used for sorting into a temporary array, sort the temporary array and then walk the temporary array to achieve the right order.</p>
+
+<pre class="brush: js">// the array to be sorted
+var list = ['Delta', 'alpha', 'CHARLIE', 'bravo'];
+
+// temporary array holds objects with position and sort-value
+var mapped = list.map(function(el, i) {
+ return { index: i, value: el.toLowerCase() };
+})
+
+// sorting the mapped array containing the reduced values
+mapped.sort(function(a, b) {
+ return +(a.value &gt; b.value) || +(a.value === b.value) - 1;
+});
+
+// container for the resulting order
+var result = mapped.map(function(el){
+ return list[el.index];
+});
+</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('ES1')}}</td>
+ <td>{{Spec2('ES1')}}</td>
+ <td>Initial definition.</td>
+ </tr>
+ <tr>
+ <td>{{SpecName('ES5.1', '#sec-15.4.4.11', 'Array.prototype.sort')}}</td>
+ <td>{{Spec2('ES5.1')}}</td>
+ <td></td>
+ </tr>
+ <tr>
+ <td>{{SpecName('ES6', '#sec-array.prototype.sort', 'Array.prototype.sort')}}</td>
+ <td>{{Spec2('ES6')}}</td>
+ <td></td>
+ </tr>
+ <tr>
+ <td>{{SpecName('ESDraft', '#sec-array.prototype.sort', 'Array.prototype.sort')}}</td>
+ <td>{{Spec2('ESDraft')}}</td>
+ <td></td>
+ </tr>
+ </tbody>
+</table>
+
+<h2 id="Böngésző_kompatibilitás">Böngésző kompatibilitás</h2>
+
+<div>{{CompatibilityTable}}</div>
+
+<div id="compat-desktop">
+<table class="compat-table">
+ <tbody>
+ <tr>
+ <th>Funkció</th>
+ <th>Chrome</th>
+ <th>Firefox (Gecko)</th>
+ <th>Internet Explorer</th>
+ <th>Opera</th>
+ <th>Safari</th>
+ </tr>
+ <tr>
+ <td>Alap támogatás</td>
+ <td>{{CompatChrome("1.0")}}</td>
+ <td>{{CompatGeckoDesktop("1.7")}}</td>
+ <td>{{CompatIE("5.5")}}</td>
+ <td>{{CompatVersionUnknown}}</td>
+ <td>{{CompatVersionUnknown}}</td>
+ </tr>
+ </tbody>
+</table>
+</div>
+
+<div id="compat-mobile">
+<table class="compat-table">
+ <tbody>
+ <tr>
+ <th>Funkció</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>Alap támogátás</td>
+ <td>{{CompatVersionUnknown}}</td>
+ <td>{{CompatVersionUnknown}}</td>
+ <td>{{CompatVersionUnknown}}</td>
+ <td>{{CompatVersionUnknown}}</td>
+ <td>{{CompatVersionUnknown}}</td>
+ <td>{{CompatVersionUnknown}}</td>
+ </tr>
+ </tbody>
+</table>
+</div>
+
+<h2 id="Lásd_még">Lásd még</h2>
+
+<ul>
+ <li>{{jsxref("Array.prototype.reverse()")}}</li>
+ <li>{{jsxref("String.prototype.localeCompare()")}}</li>
+</ul>