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copied!<p>The reason why this question pops up in your mind is because you don't understand neither Javascript or JSON enough.</p> <p>The Javascript array is always the numerical array. There is no associate array in JavaScript like the one you get in PHP using <code>json_decode(json, true);</code>. When people talking about associate array in JavaScript, they are in fact using JavaScript objects and it's properties, i.e.,</p> <pre><code>var my_so_called_array = {}; my_so_called_array['first_item'] = 'hello world'; alert(my_so_called_array['first_item']); // 'hello world' alert(my_so_called_array.first_item); // also 'hello world' </code></pre> <p>One of the best about JSON is that the syntax is a subset of the object literal notation. That means JSON string itself is valid code for representing the "associate array" in Javascript. The "conversion" couldn't be simpler, just <code>eval()</code> the string as code will do:</p> <pre><code>var my_data = eval(json_string); </code></pre> <p>Or, use <code>jQuery.parseJSON()</code> or <code>JSON.parse()</code>:</p> <pre><code>var my_data = jQuery.parseJSON(json_string); var my_data = JSON.parse(json_string); </code></pre> <p>The reason people prefer using <code>jQuery.parseJSON()</code> or <code>JSON.parse()</code> over <code>eval()</code> is because <strong>eval is evil</strong>: </p> <ol> <li>It's slower</li> <li>It doesn't check the validity of the JSON code, makes it suspect-able to injection attack.</li> </ol> <p>Does the above explanation answer your question? You can find more information about JSON at www.json.org.</p>

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