wasn't supposed to be orphaned (ja) (#1672)

* wasn't supposed to be orphaned (ja)

* fix redirects

* fix slug front-matter

1 files changed, 94 insertions, 0 deletions

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+---
+title: Map.prototype[@@iterator]()
+slug: Web/JavaScript/Reference/Global_Objects/Map/@@iterator
+tags:
+  - ECMAScript 2015
+  - Iterator
+  - JavaScript
+  - Map
+  - Method
+  - Prototype
+  - Reference
+translation_of: Web/JavaScript/Reference/Global_Objects/Map/@@iterator
+original_slug: Web/JavaScript/Reference/Global_Objects/Map/@@iterator
+---
+<div>{{JSRef}}</div>
+
+<p class="seoSummary"><strong><code>@@iterator</code></strong> プロパティの初期値は、 {{jsxref("Map.prototype.entries()", "entries")}} メソッドの初期値と同じ関数オブジェクトです。</p>
+
+<div>{{EmbedInteractiveExample("pages/js/map-prototype-@@iterator.html")}}</div>
+
+<div class="hidden">このデモのソースファイルは GitHub リポジトリに格納されています。デモプロジェクトに協力したい場合は、 <a href="https://github.com/mdn/interactive-examples">https://github.com/mdn/interactive-examples</a> をクローンしてプルリクエストを送信してください。</div>
+
+<h2 id="Syntax" name="Syntax">構文</h2>
+
+<pre class="syntaxbox notranslate"><var>myMap</var>[Symbol.iterator]</pre>
+
+<h3 id="Return_value" name="Return_value">返値</h3>
+
+<p>マップの <strong>iterator</strong> 関数で、既定では {{jsxref("Map.prototype.entries()", "entries()")}} 関数です。</p>
+
+<h2 id="Examples" name="Examples">例</h2>
+
+<h3 id="Using_iterator" name="Using_iterator">[@@iterator]() の使用</h3>
+
+<pre class="brush:js notranslate">const myMap = new Map()
+myMap.set('0', 'foo')
+myMap.set(1, 'bar')
+myMap.set({}, 'baz')
+
+const mapIter = myMap[Symbol.iterator]()
+
+console.log(mapIter.next().value) // ["0", "foo"]
+console.log(mapIter.next().value) // [1, "bar"]
+console.log(mapIter.next().value) // [Object, "baz"]
+</pre>
+
+<h3 id="Using_iterator_with_for..of" name="Using_iterator_with_for..of">[@@iterator]() と for..of の併用</h3>
+
+<pre class="brush: js notranslate">const myMap = new Map()
+myMap.set('0', 'foo')
+myMap.set(1, 'bar')
+myMap.set({}, 'baz')
+
+for (const entry of myMap) {
+  console.log(entry)
+}
+// ["0", "foo"]
+// [1, "bar"]
+// [{}, "baz"]
+
+for (const [key, value] of myMap) {
+  console.log(`${key}: ${value}`)
+}
+// 0: foo
+// 1: bar
+// [Object]: baz
+</pre>
+
+<h2 id="Specifications" name="Specifications">仕様書</h2>
+
+<table class="standard-table">
+ <thead>
+  <tr>
+   <th scope="col">仕様書</th>
+  </tr>
+ </thead>
+ <tbody>
+  <tr>
+   <td>{{SpecName('ESDraft', '#sec-map.prototype-@@iterator', 'Map.prototype[@@iterator]()')}}</td>
+  </tr>
+ </tbody>
+</table>
+
+<h2 id="Browser_compatibility" name="Browser_compatibility">ブラウザーの互換性</h2>
+
+<p>{{Compat("javascript.builtins.Map.@@iterator")}}</p>
+
+<h2 id="See_also" name="See_also">関連情報</h2>
+
+<ul>
+ <li>{{jsxref("Map.prototype.entries()")}}</li>
+ <li>{{jsxref("Map.prototype.keys()")}}</li>
+ <li>{{jsxref("Map.prototype.values()")}}</li>
+</ul>