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104 lines
4.2 KiB
HTML
104 lines
4.2 KiB
HTML
<article id="wikiArticle">
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<div></div>
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<p>entries() 方法返回一个新的迭代器对象 ,这个对象的元素是类似 [value, value] 形式的数组,value 是集合对象中的每个元素,迭代器对象元素的顺序即集合对象中元素插入的顺序。由于集合对象不像 Map 对象那样拥有 key,然而,为了与 Map 对象的 API 形式保持一致,故使得每一个 entry 的 key 和 value 都拥有相同的值,因而最终返回一个 [value, value] 形式的数组。</p>
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<h2 id="语法">语法</h2>
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<pre><code class="language-javascript"><code><em>mySet</em>.entries()</code></code></pre>
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<h3 id="返回值">返回值</h3>
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<p>一个新的包含 [value, value] 形式的数组迭代器对象,value 是给定集合中的每个元素,迭代器 对象元素的顺序即集合对象中元素插入的顺序。</p>
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<h2 id="示例">示例</h2>
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<h3 id="使用_entries()">使用 <code>entries()</code></h3>
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<pre><code class="language-js">var mySet = new Set();
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mySet.add("foobar");
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mySet.add(1);
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mySet.add("baz");
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var setIter = mySet.entries();
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console.log(setIter.next().value); // ["foobar", "foobar"]
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console.log(setIter.next().value); // [1, 1]
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console.log(setIter.next().value); // ["baz", "baz"]
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</code></pre>
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<h2 id="规范">规范</h2>
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<table class="standard-table">
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<tbody>
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<tr>
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<th scope="col">规范</th>
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<th scope="col">状态</th>
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<th scope="col">说明</th>
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</tr>
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<tr>
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<td><a class="external" href="https://www.ecma-international.org/ecma-262/6.0/#sec-set.prototype.entries" hreflang="en" lang="en" rel="noopener">ECMAScript 2015 (6th Edition, ECMA-262)<br/><small lang="zh-CN">Set.prototype.entries</small></a></td>
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<td><span class="spec-Standard">Standard</span></td>
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<td>初始定义。</td>
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</tr>
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<tr>
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<td><a class="external" href="https://tc39.github.io/ecma262/#sec-set.prototype.entries" hreflang="en" lang="en" rel="noopener">ECMAScript Latest Draft (ECMA-262)<br/><small lang="zh-CN">Set.prototype.entries</small></a></td>
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<td><span class="spec-Draft">Draft</span></td>
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<td> </td>
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</tr>
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</tbody>
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</table>
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<h2 id="浏览器兼容性">浏览器兼容性 </h2>
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<p></p><div class="blockIndicator warning"><strong><a class="external" href="https://github.com/mdn/browser-compat-data" rel="noopener">We're converting our compatibility data into a machine-readable JSON format</a></strong>.
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This compatibility table still uses the old format,
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because we haven't yet converted the data it contains.
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<strong><a class="new" href="/zh-CN/docs/MDN/Contribute/Structures/Compatibility_tables" rel="nofollow">Find out how you can help!</a></strong></div>
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<div class="htab">
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<a id="AutoCompatibilityTable" name="AutoCompatibilityTable"></a>
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<ul>
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<li class="selected"><a>Desktop</a></li>
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<li><a>Mobile</a></li>
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</ul>
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</div><p></p>
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<div id="compat-desktop">
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<table class="compat-table">
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<tbody>
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<tr>
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<th>Feature</th>
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<th>Chrome</th>
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<th>Firefox (Gecko)</th>
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<th>Internet Explorer</th>
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<th>Opera</th>
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<th>Safari</th>
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</tr>
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<tr>
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<td>Basic support</td>
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<td>38</td>
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<td><a href="/en-US/Firefox/Releases/24" title="Released on 2013-09-17.">24</a> (24)</td>
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<td><span style="color: #f00;">未实现</span></td>
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<td>25</td>
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<td>7.1</td>
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</tr>
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</tbody>
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</table>
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</div>
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<div id="compat-mobile">
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<table class="compat-table">
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<tbody>
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<tr>
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<th>Feature</th>
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<th>Android</th>
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<th>Chrome for Android</th>
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<th>Firefox Mobile (Gecko)</th>
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<th>IE Mobile</th>
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<th>Opera Mobile</th>
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<th>Safari Mobile</th>
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</tr>
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<tr>
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<td>Basic support</td>
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<td><span style="color: #f00;">未实现</span></td>
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<td>38</td>
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<td>24.0 (24)</td>
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<td><span style="color: #f00;">未实现</span></td>
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<td><span style="color: #f00;">未实现</span></td>
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<td>8</td>
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</tr>
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</tbody>
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</table>
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</div>
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<h2 id="相关链接">相关链接</h2>
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<ul>
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<li><a class="new" href="Reference/Global_Objects/Set/keys" rel="nofollow" title="此页面仍未被本地化, 期待您的翻译!"><code>Set.prototype.keys()</code></a></li>
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<li><a href="Reference/Global_Objects/Set/values" title="values() 方法返回一个 Iterator 对象,这个对象以插入 Set 对象的顺序包含了原 Set 对象里的每个元素。"><code>Set.prototype.values()</code></a></li>
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</ul>
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</article> |