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108 lines
7.8 KiB
HTML
108 lines
7.8 KiB
HTML
<article class="" id="post-">
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<header class="entry-header">
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<h1 class="entry-title">jQuery.makeArray()</h1>
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<div class="entry-meta">
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所属分类：<span class="category"><a href="/category/utilities/">工具类</a></span>
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<span class="pull-right">英文文档：<a href="https://api.jquery123.com/jQuery.makeArray/" target="_blank">jQuery.makeArray()</a></span>
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</div><!-- .entry-meta -->
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</header><!-- .entry-header -->
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<!-- .entry-header -->
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<div class="entry-content">
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<article class="entry method" id="jQuery-makeArray1"><h2 class="section-title">
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<span class="name">jQuery.makeArray( obj )</span><span class="returns">返回: <a href="/Types/#Array">Array</a></span>
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</h2>
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<div class="entry-wrapper">
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<p class="desc"><strong>描述: </strong>转换一个类似数组的对象成为真正的JavaScript数组。</p>
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<ul class="signatures"><li class="signature" id="jQuery-makeArray-obj">
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<h4 class="name">
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<span class="version-details">添加的版本: <a href="/category/version/1.2/">1.2</a></span>jQuery.makeArray( obj )</h4>
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<ul><li>
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<div><strong>obj</strong></div>
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<div>类型: <a href="/Types/#PlainObject">PlainObject</a>
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</div>
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<div>转换成一个原生数组的任何对象。</div>
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</li></ul>
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</li></ul>
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<div class="longdesc" id="entry-longdesc">
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<p>一般来说，无论是在jQuery和JavaScript中很多方法都返回类似数组的对象。举例来说，jQuery的代理函数<code>$()</code>返回一个jQuery对象具有许多的数组的属性。（length， <code>[]</code>数组访问运算符等），但和数组并不完全一样，缺少一些对数组的内置方法（如<code>.pop()</code>和<code>.reverse()</code>）。</p>
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<p>请注意，转换后，任何有特殊功能的对象（如在我们的例子中jQuery方法）将不再存在。现在的对象是一个普通的数组。</p>
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</div>
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<section class="entry-examples" id="entry-examples"><header><h2 class="underline">例子:</h2></header><div class="entry-example" id="example-0">
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<h4>Example: <span class="desc">将一个 HTMLElements 集合转换成对应的数组。</span>
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</h4>
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</td>
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<td class="code">
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<pre><div class="container"><div class="line"><code><span class="doctype"><!DOCTYPE html></span></code></div></div><div class="container"><div class="line"><code><span class="tag"><<span class="title">html</span>></span></code></div></div><div class="container"><div class="line"><code><span class="tag"><<span class="title">head</span>></span></code></div></div><div class="container"><div class="line"><code> <span class="tag"><<span class="title">style</span>></span><span class="css"></span></code></div></div><div class="container"><div class="line"><code> <span class="tag">div</span> <span class="rules">{ <span class="rule"><span class="attribute">color</span>:<span class="value">red;</span></span> <span class="rule">}</span></span></code></div></div><div class="container"><div class="line"><code> <span class="tag"></<span class="title">style</span>></span></code></div></div><div class="container"><div class="line"><code> <span class="tag"><<span class="title">script</span> <span class="attribute">src</span>=<span class="value">"https://code.jquery.com/jquery-latest.js"</span>></span><span class="javascript"></span><span class="tag"></<span class="title">script</span>></span></code></div></div><div class="container"><div class="line"><code><span class="tag"></<span class="title">head</span>></span></code></div></div><div class="container"><div class="line"><code><span class="tag"><<span class="title">body</span>></span></code></div></div><div class="container"><div class="line"><code> <span class="tag"><<span class="title">div</span>></span>First<span class="tag"></<span class="title">div</span>></span></code></div></div><div class="container"><div class="line"><code> <span class="tag"><<span class="title">div</span>></span>Second<span class="tag"></<span class="title">div</span>></span></code></div></div><div class="container"><div class="line"><code> <span class="tag"><<span class="title">div</span>></span>Third<span class="tag"></<span class="title">div</span>></span></code></div></div><div class="container"><div class="line"><code> </code></div></div><div class="container"><div class="line"><code> <span class="tag"><<span class="title">div</span>></span>Fourth<span class="tag"></<span class="title">div</span>></span></code></div></div><div class="container"><div class="line"><code><span class="tag"><<span class="title">script</span>></span><span class="javascript"></span></code></div></div><div class="container"><div class="line"><code> <span class="keyword">var</span> elems = document.getElementsByTagName(<span class="string">"div"</span>); <span class="comment">// returns a nodeList</span></code></div></div><div class="container"><div class="line"><code> <span class="keyword">var</span> arr = jQuery.makeArray(elems);</code></div></div><div class="container"><div class="line"><code> arr.reverse(); <span class="comment">// use an Array method on list of dom elements</span></code></div></div><div class="container"><div class="line"><code> $(arr).appendTo(document.body);</code></div></div><div class="container"><div class="line"><code><span class="tag"></<span class="title">script</span>></span></code></div></div><div class="container"><div class="line"><code> </code></div></div><div class="container"><div class="line"><code><span class="tag"></<span class="title">body</span>></span></code></div></div><div class="container"><div class="line"><code><span class="tag"></<span class="title">html</span>></span></code></div></div></pre>
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</td>
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</tbody>
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</table>
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</div>
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<h4>Demo:</h4>
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<div class="demo code-demo"></div>
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</div>
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<div class="entry-example" id="example-1">
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<h4>Example: <span class="desc">将一个 jQuery 对象转换成一个数组。</span>
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</h4>
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<div class="syntaxhighlighter javascript ">
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<table>
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<td class="code">
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<pre><div class="container"><div class="line"><code> <span class="keyword">var</span> obj = $(<span class="string">'li'</span>);</code></div></div><div class="container"><div class="line"><code> <span class="keyword">var</span> arr = $.makeArray(obj);</code></div></div></pre>
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</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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<h4>Result:</h4>
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<div class="syntaxhighlighter javascript nogutter">
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<table>
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<div class="line n1">1</div>
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<td class="code">
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<pre><div class="container"><div class="line"><code>(<span class="keyword">typeof</span> obj === <span class="string">'object'</span> && obj.jquery) === <span class="literal">true</span>;</code></div></div><div class="container"><div class="line"><code>jQuery.isArray(arr) === <span class="literal">true</span>;</code></div></div></pre>
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</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></section>
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</div></article> </div>
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</article> |