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99 lines
3.6 KiB
HTML
99 lines
3.6 KiB
HTML
<article id="wikiArticle">
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<div></div>
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<p><code><strong>entries()</strong></code> ?方法返回一个新的包含 <code>[key, value]</code> ?对的 <code><strong>Iterator</strong></code> ?对象，返回的迭代器的迭代顺序与 <code>Map</code> 对象的插入顺序相同。</p>
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<h2 id="语法">语法</h2>
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<pre><code class="language-javascript"><code><em>myMap</em>.entries()</code></code></pre>
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<h2 id="示例">示例</h2>
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<h3 id="entries()_的使用"><code>entries() 的使用</code></h3>
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<pre><code class="language-js">var myMap = new Map();
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myMap.set("0", "foo");
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myMap.set(1, "bar");
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myMap.set({}, "baz");
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var mapIter = myMap.entries();
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console.log(mapIter.next().value); // ["0", "foo"]
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console.log(mapIter.next().value); // [1, "bar"]
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console.log(mapIter.next().value); // [Object, "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">Specification</th>
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<th scope="col">Status</th>
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<th scope="col">Comment</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-map.prototype.entries" hreflang="en" lang="en" rel="noopener">ECMAScript 2015 (6th Edition, ECMA-262)<br/><small lang="zh-CN">Map.prototype.entries</small></a></td>
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<td><span class="spec-Standard">Standard</span></td>
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<td>Initial definition.</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/20" title="Released on 2013-04-02.">20</a> (20)</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>Edge</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><span style="color: #888;" title="Please update this with the earliest version of support.">(Yes)</span></td>
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<td>20.0 (20)</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 href="Reference/Global_Objects/Map/keys" title="keys() 返回一个新的 Iterator 对象。它包含按照顺序插入 Map 对象中每个元素的key值。"><code>Map.prototype.keys()</code></a></li>
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<li><a href="Reference/Global_Objects/Map/values" title="一个新的 Map 可迭代对象."><code>Map.prototype.values()</code></a></li>
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</ul>
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</article> |