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POConverting javascript string to code without using eval
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2011-09-12T16:13:56.933
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I'm trying to do the below without using eval() as so many posts say it's slow and evil so you shouldn't use it as there's always alternative ways. The JS (note i'm using jquery) <pre><code>$('a').click(function() { //Assign myVar to the id value of the a tag var myVar = $(this).attr('id'); $.getJSON("assets/js/json.js", function(json) { alert("json."+myVar+".thumb"); }); }); </code></pre> And i have some basic html, which passing in the value for myVar <pre><code><a id="imageID1" href="#">A link 1</a> <a id="imageID2" href="#">A link 2</a> </code></pre> Basic JSON file <pre><code> { "imageID1" : { "thumb" : "assets/images/312px.png", "zoomThumb" : "assets/images/gallery/_AR_0063_m_thumb.jpg", "large" : "assets/images/gallery/_AR_0063.jpg" }, "imageID2" : { "thumb" : "another.png", "zoomThumb" : "assets/images/gallery/_anotherb.jpg", "large" : "assets/images/gallery/another.jpg" } } </code></pre> So the ID for each link is passed to myVar on click, this is working fine but the alert value isn't correct. For example if imageID2 is click the alert should actually display "another.png" but instead it's displaying the code i actually want to run, "json.imageID@.thumb". Now i can change the alert line to <pre><code> alert(eval("json."+myVar+".thumb")); </code></pre> Which does the trick, but as mentioned don't want to use eval due to the know issues. So any alternative way of doing the above. Thanks in advance for any help or tips. Ben
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<javascript><eval>
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Converting javascript string to code without using eval
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1. COpossible duplicate of [How to access object using dynamic key?](http://stackoverflow.com/questions/6921803/javascript-how-to-access-json-object-using-dynamic-key)
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 POConverting javascript string to code without using eval
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 USFelix Kling

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