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    <p>There are a few problems here.</p> <ol> <li>When you call jQuery with an array (like you're doing), jQuery expects it to be an array of DOM elements.</li> <li>If you want to use <code>$.each</code>, use the <a href="http://api.jquery.com/jquery.each/" rel="nofollow">static version</a> that iterates over generic objects or arrays.</li> </ol> <p>With both of those things said, there's <em>stil</em> an issue with using <code>$.each</code> with an array containing primitive values. The following code exhibits the same problem you were seeing:</p> <pre><code>$.each([".b"], function () { console.log($('.a').find(this).text()); // Expecting to print "Test" }); </code></pre> <p>Inside the callback function for <code>.each</code>, <code>this</code> is a <code>String</code> <em>object</em> and not a string <em>primitive</em>. To understand this, we need to look at what <code>.each</code> is doing under the hood:</p> <pre><code>for (; i &lt; length;) { if (callback.apply(object[i++], args) === false) { // &lt;---- break; } } </code></pre> <p>The important bit is the call to <code>apply</code>. According to the ECMAScript specification, when a primitive value is passed to <code>apply</code>, the value's <code>toObject</code> method is called:</p> <blockquote> <p>If thisArg is null or undefined, the called function is passed the global object as the this value. <strong>Otherwise, the called function is passed ToObject(thisArg)</strong> as the this value.</p> </blockquote> <p>This explains why your code was not working-- <code>.find</code> expects a string primitive and not a String object.</p> <p>This is why <a href="http://api.jquery.com/jquery.each/" rel="nofollow">the documentation for <code>$.each</code></a> actually mentions using <code>this</code> with primitive values:</p> <blockquote> <p>(The value can also be accessed through the this keyword, <strong>but Javascript will always wrap the this value as an Object even if it is a simple string or number value.</strong>).</p> </blockquote> <p>Therefore the way to fix the problem with your code is to leverage the <code>element</code> argument that's passed to the callback function:</p> <pre><code>$.each([".b"], function (_, item) { console.log($('.a').find(item).text()); // Expecting to print "Test" }); </code></pre>
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    1. CO+1 - Although the (currently accepted) answer by @charlietftl basically says the same thing, this answer has a great explanation of why the `this` inside array based eaches is a bad idea.
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