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+---
+title: Map
+slug: Web/JavaScript/Reference/Global_Objects/Map
+tags:
+  - ECMAScript 2015
+  - JavaScript
+  - Map
+  - NeedsTranslation
+  - TopicStub
+translation_of: Web/JavaScript/Reference/Global_Objects/Map
+---
+<div>{{JSRef}}</div>
+
+<p><span class="seoSummary">The <strong><code>Map</code></strong> object holds key-value pairs.</span> Any value (both objects and {{Glossary("Primitive", "primitive values")}}) may be used as either a key or a value.</p>
+
+<h2 id="Syntax">Syntax</h2>
+
+<pre class="syntaxbox">new Map([<em>iterable</em>])</pre>
+
+<h3 id="Parameters">Parameters</h3>
+
+<dl>
+ <dt><code>iterable</code></dt>
+ <dd>An {{jsxref("Array")}} or other <a href="/en-US/docs/Web/JavaScript/Guide/iterable">iterable</a> object whose elements are key-value pairs (arrays with two elements, e.g. <code>[[ 1, 'one' ],[ 2, 'two' ]]</code>). Each key-value pair is added to the new <code>Map</code>; <code>null</code> values are treated as <code>undefined</code>.</dd>
+</dl>
+
+<h2 id="Description">Description</h2>
+
+<p>A <code>Map</code> object iterates its elements in insertion order — a {{jsxref("Statements/for...of", "for...of")}} loop returns an array of <code>[key, value]</code> for each iteration.<br>
+ <br>
+ It should be noted that a <code>Map</code> which is a map of an object, especially a dictionary of dictionaries, will only map to the object's insertion order—which is random and not ordered.</p>
+
+<h3 id="Key_equality">Key equality</h3>
+
+<p>Key equality is based on the "SameValueZero" algorithm: <code>NaN</code> is considered the same as <code>NaN</code> (even though <code>NaN !== NaN</code>) and all other values are considered equal according to the semantics of the <code>===</code> operator. In the current ECMAScript specification <code>-0</code> and <code>+0</code> are considered equal, although this was not so in earlier drafts. See "Value equality for -0 and 0" in the <a href="#Browser_compatibility">browser compatibility</a> table for details.</p>
+
+<h3 id="Objects_and_maps_compared">Objects and maps compared</h3>
+
+<p>{{jsxref("Object", "Objects")}} are similar to <code>Maps</code> in that both let you set keys to values, retrieve those values, delete keys, and detect whether something is stored at a key. Because of this (and because there were no built-in alternatives), <code>Object</code>s have been used as <code>Maps</code> historically; however, there are important differences that make using a <code>Map</code> preferable in certain cases:</p>
+
+<ul>
+ <li>The keys of an <code>Object</code> are {{jsxref("String", "Strings")}} and {{jsxref("Symbol", "Symbols")}}, whereas they can be any value for a <code>Map</code>, including functions, objects, and any primitive.</li>
+ <li>You can get the size of a <code>Map</code> easily with the <code>size</code> property, while the number of properties in an <code>Object</code> must be determined manually.</li>
+ <li>A <code>Map</code> is an <a href="/en-US/docs/Web/JavaScript/Guide/iterable">iterable</a> and can thus be directly iterated, whereas iterating over an <code>Object</code> requires obtaining its keys in some fashion and iterating over them.</li>
+ <li>An <code>Object</code> has a prototype, so there are default keys in the map that could collide with your keys if you're not careful. As of ES5 this can be bypassed by using <code>map = Object.create(null)</code>, but this is seldom done.</li>
+ <li>A <code>Map</code> may perform better in scenarios involving frequent addition and removal of key pairs.</li>
+</ul>
+
+<h2 id="Properties">Properties</h2>
+
+<dl>
+ <dt><code>Map.length</code></dt>
+ <dd>The value of the <code>length</code> property is 0.</dd>
+ <dt>{{jsxref("Map.@@species", "get Map[@@species]")}}</dt>
+ <dd>The constructor function that is used to create derived objects.</dd>
+ <dt>{{jsxref("Map.prototype")}}</dt>
+ <dd>Represents the prototype for the <code>Map</code> constructor. Allows the addition of properties to all <code>Map</code> objects.</dd>
+</dl>
+
+<h2 id="Map_instances"><code>Map</code> instances</h2>
+
+<p>All <code>Map</code> instances inherit from {{jsxref("Map.prototype")}}.</p>
+
+<h3 id="Properties_2">Properties</h3>
+
+<p>{{page('en-US/Web/JavaScript/Reference/Global_Objects/Map/prototype','Properties')}}</p>
+
+<h3 id="Methods">Methods</h3>
+
+<p>{{page('en-US/Web/JavaScript/Reference/Global_Objects/Map/prototype','Methods')}}</p>
+
+<h2 id="Examples">Examples</h2>
+
+<h3 id="Using_the_Map_object">Using the <code>Map</code> object</h3>
+
+<pre class="brush: js">var myMap = new Map();
+
+var keyString = 'a string',
+    keyObj = {},
+    keyFunc = function() {};
+
+// setting the values
+myMap.set(keyString, "value associated with 'a string'");
+myMap.set(keyObj, 'value associated with keyObj');
+myMap.set(keyFunc, 'value associated with keyFunc');
+
+myMap.size; // 3
+
+// getting the values
+myMap.get(keyString);    // "value associated with 'a string'"
+myMap.get(keyObj);       // "value associated with keyObj"
+myMap.get(keyFunc);      // "value associated with keyFunc"
+
+myMap.get('a string');   // "value associated with 'a string'"
+                         // because keyString === 'a string'
+myMap.get({});           // undefined, because keyObj !== {}
+myMap.get(function() {}) // undefined, because keyFunc !== function () {}
+</pre>
+
+<h3 id="Using_NaN_as_Map_keys">Using <code>NaN</code> as <code>Map</code> keys</h3>
+
+<p><code>NaN</code> can also be used as a key. Even though every <code>NaN</code> is not equal to itself (<code>NaN !== NaN</code> is true), the following example works because <code>NaN</code>s are indistinguishable from each other:</p>
+
+<pre class="brush: js">var myMap = new Map();
+myMap.set(NaN, 'not a number');
+
+myMap.get(NaN); // "not a number"
+
+var otherNaN = Number('foo');
+myMap.get(otherNaN); // "not a number"
+</pre>
+
+<h3 id="Iterating_Maps_with_for..of">Iterating <code>Maps</code> with <code>for..of</code></h3>
+
+<p>Maps can be iterated using a <code>for..of</code> loop:</p>
+
+<pre class="brush: js">var myMap = new Map();
+myMap.set(0, 'zero');
+myMap.set(1, 'one');
+for (var [key, value] of myMap) {
+  console.log(key + ' = ' + value);
+}
+// 0 = zero
+// 1 = one
+
+for (var key of myMap.keys()) {
+  console.log(key);
+}
+// 0
+// 1
+
+for (var value of myMap.values()) {
+  console.log(value);
+}
+// zero
+// one
+
+for (var [key, value] of myMap.entries()) {
+  console.log(key + ' = ' + value);
+}
+// 0 = zero
+// 1 = one
+</pre>
+
+<h3 id="Iterating_Maps_with_forEach()">Iterating <code>Maps</code> with <code>forEach()</code></h3>
+
+<p>Maps can be iterated using the <code>forEach()</code> method:</p>
+
+<pre class="brush: js">myMap.forEach(function(value, key) {
+  console.log(key + ' = ' + value);
+});
+// Will show 2 logs; first with "0 = zero" and second with "1 = one"
+</pre>
+
+<h3 id="Relation_with_Array_objects">Relation with <code>Array</code> objects</h3>
+
+<pre class="brush: js">var kvArray = [['key1', 'value1'], ['key2', 'value2']];
+
+// Use the regular Map constructor to transform a 2D key-value Array into a map
+var myMap = new Map(kvArray);
+
+myMap.get('key1'); // returns "value1"
+
+// Use the Array.from function to transform a map into a 2D key-value Array
+console.log(Array.from(myMap)); // Will show you exactly the same Array as kvArray
+
+// Or use the keys or values iterators and convert them to an array
+console.log(Array.from(myMap.keys())); // Will show ["key1", "key2"]
+</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('ES2015', '#sec-map-objects', 'Map')}}</td>
+   <td>{{Spec2('ES2015')}}</td>
+   <td>Initial definition.</td>
+  </tr>
+  <tr>
+   <td>{{SpecName('ESDraft', '#sec-map-objects', 'Map')}}</td>
+   <td>{{Spec2('ESDraft')}}</td>
+   <td> </td>
+  </tr>
+ </tbody>
+</table>
+
+<h2 id="Browser_compatibility">Browser compatibility</h2>
+
+
+
+<p>{{Compat("javascript.builtins.Map")}}</p>
+
+<h2 id="See_also">See also</h2>
+
+<ul>
+ <li><a class="link-https" href="https://bugzilla.mozilla.org/show_bug.cgi?id=697479">Map and Set bug at Mozilla</a></li>
+ <li><a class="external" href="http://wiki.ecmascript.org/doku.php?id=harmony:simple_maps_and_sets">ECMAScript Harmony proposal</a></li>
+ <li>{{jsxref("Set")}}</li>
+ <li>{{jsxref("WeakMap")}}</li>
+ <li>{{jsxref("WeakSet")}}</li>
+</ul>
diff --git a/files/tr/web/javascript/reference/global_objects/map/prototype/index.html b/files/tr/web/javascript/reference/global_objects/map/prototype/index.html
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+---
+title: Map.prototype
+slug: Web/JavaScript/Reference/Global_Objects/Map/prototype
+translation_of: Web/JavaScript/Reference/Global_Objects/Map
+---
+<div>{{JSRef}}</div>
+
+<p><code><strong>Map</strong></code><strong><code>.prototype</code></strong> özelliği {{jsxref("Map")}} kurucusunun prototipini temsil eder.</p>
+
+<div>{{js_property_attributes(0,0,0)}}</div>
+
+<h2 id="Tanım">Tanım</h2>
+
+<p>{{jsxref("Map")}} örnekleri {{jsxref("Map.prototype")}}'den miras alınır. Tüm <code>Map</code> örneklerine özellikler veya yöntemler eklemek için yapıcının prototip nesnesini kullanabilirsiniz.</p>
+
+<h2 id="Özellikleri">Özellikleri</h2>
+
+<dl>
+ <dt><code>Map.prototype.constructor</code></dt>
+ <dd>Bir örneğin prototipini oluşturan işlevi döndürür. Bu, varsayılan olarak {{jsxref("Map")}} işlevidir.</dd>
+ <dt>{{jsxref("Map.prototype.size")}}</dt>
+ <dd><code>Map</code> nesnesindeki anahtar / değer çiftlerinin sayısını döndürür.</dd>
+</dl>
+
+<h2 id="Yöntemler">Yöntemler</h2>
+
+<dl>
+ <dt>{{jsxref("Map.prototype.clear()")}}</dt>
+ <dd>Tüm anahtar / değer çiftlerini <code>Map</code> objesinden siler.</dd>
+ <dt>{{jsxref("Map.delete", "Map.prototype.delete(key)")}}</dt>
+ <dd><code>Map</code> nesnesindeki bir öge varsa ve kaldırılmışsa <code>true</code> öge yoksa <code>false</code> döndürür. <code>Map.prototype.has(key)</code> daha sonra <code>false</code> döndürür.</dd>
+ <dt>{{jsxref("Map.prototype.entries()")}}</dt>
+ <dd>Ekleme sırasındaki <code>Map</code> nesnesindeki her öge için <strong><code>[anahtar, değer] </code></strong>dizisini içeren yeni bir <code>Iterator</code> nesnesini döndürür.</dd>
+ <dt>{{jsxref("Map.forEach", "Map.prototype.forEach(callbackFn[, thisArg])")}}</dt>
+ <dd><code>Map</code> nesnesindeki her anahtar - değer çifti için ekleme sırasına göre callbackFn ögesini bir kez çağırır.  thisArg parametresi forEach için sağlanmışsa, her geri çağırma için bu değer olarak kullanılacaktır.</dd>
+ <dt>{{jsxref("Map.get", "Map.prototype.get(key)")}}</dt>
+ <dd><code>key</code> ile ilişkilendirilmiş değeri veya hiçbir şey yoksa <code>undefined</code> değerini döndürür.</dd>
+ <dt>{{jsxref("Map.has", "Map.prototype.has(key)")}}</dt>
+ <dd><code>Map</code> nesnesindeki bir değerin <code>key</code> ile ilişkili olup olmadığını belirten bir boolean döndürür.</dd>
+ <dt>{{jsxref("Map.prototype.keys()")}}</dt>
+ <dd><code>Map</code> nesnesindeki her bir ögenin<strong> anahtarlarını</strong> ekleme sırasına göre içeren yeni bir <code>Iterator</code> nesnesi döndürür.</dd>
+ <dt>{{jsxref("Map.set", "Map.prototype.set(key, value)")}}</dt>
+ <dd><code>Map</code>nesnesindeki <code>key</code> değerini ayarlar. <code>Map</code> nesnesini döndürür.</dd>
+ <dt>{{jsxref("Map.prototype.values()")}}</dt>
+ <dd><code>Map</code> nesnesindeki her bir ögenin <strong>değerlerini </strong>ekleme sırasına göre içeren yeni bir  <code>Iterator</code> nesnesi döndürür.</dd>
+ <dt>{{jsxref("Map.@@iterator", "Map.prototype[@@iterator]()")}}</dt>
+ <dd>Ekleme sırasındaki <code>Map</code> nesnesindeki her bir öge için<strong><code>[anahtar, değer]</code></strong> dizisini içeren yeni bir <code>Iterator</code> nesnesini döndürür.</dd>
+</dl>
+
+<h2 id="Şartlar">Şartlar</h2>
+
+<table class="standard-table">
+ <tbody>
+  <tr>
+   <th scope="col">Şart</th>
+   <th scope="col">Durum</th>
+   <th scope="col">Açıklama</th>
+  </tr>
+  <tr>
+   <td>{{SpecName('ES2015', '#sec-map.prototype', 'Map.prototype')}}</td>
+   <td>{{Spec2('ES2015')}}</td>
+   <td>
+    <p>İlk tanım</p>
+   </td>
+  </tr>
+  <tr>
+   <td>{{SpecName('ESDraft', '#sec-map.prototype', 'Map.prototype')}}</td>
+   <td>{{Spec2('ESDraft')}}</td>
+   <td> </td>
+  </tr>
+ </tbody>
+</table>
+
+<h2 id="Tarayıcı_Uyumluluğu">Tarayıcı Uyumluluğu</h2>
+
+<div class="hidden">Bu sayfadaki uyumluluk tablosu yapılandırılmış verilerden oluşturulmuştur. Verilere katkıda bulunmak istiyorsanız, lütfen <a href="https://github.com/mdn/browser-compat-data">https://github.com/mdn/browser-compat-data</a> adresini ziyaret etin ve bize bir istek gönderin.</div>
+
+<p>{{Compat("javascript.builtins.Map.prototype")}}</p>
+
+<h2 id="Ayrıca_Bakınız">Ayrıca Bakınız</h2>
+
+<ul>
+ <li>{{jsxref("Set.prototype")}}</li>
+</ul>