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POStrange behavior with a Javascript array, object and RaphaelJS
 

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  1. POStrange behavior with a Javascript array, object and RaphaelJS
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    <p>I have a situation of defining an object with an array in it. For some reason Chrome adds artifacts to that object before I try to use it.</p> <p>My Object: <br/></p> <pre><code>var colorPalettes = { single_A7DBD8: { amounts: [100], colors: ['#A7DBD8'] }, single_C02942: { amounts: [100], colors: ['#C02942'] } } </code></pre> <p>When I run the code, the console shows the following content for <code>var colorPalettes</code>:<br/></p> <pre><code>amounts: Array[1] 0: Object //&lt;-- added by Chrome, 'value' should come directly in the array order: 0 value: 100 valueOf: function (){return this.value} __proto__: Object length: 1 __proto__: Array[0] colors: Array[1] 0: "#A7DBD8" length: 1 __proto__: Array[0] __proto__: Object </code></pre> <p><strong>The questions are: <br/></strong></p> <ol> <li>Why does <code>amounts</code> have an <code>Object</code> inside the array? - I didn't define it.</li> <li>If so - why isn't <code>colors</code> demonstrating the same behavior?</li> <li>Why is this behavior not demonstrated in my code when I run it through jsfiddle?</li> </ol> <p><strong>What did I try: <br/></strong></p> <ol> <li>In my code <code>colorPalettes</code> is set as <code>window.something.colorPalettes</code>. I turned it into a local variable - no success. </li> <li>I tried swapping the order of <code>amounts</code> and <code>colors</code> (I know, I was desperate...) - so the behavior also swapped, now <code>colors</code> had the extra <code>Object</code>.</li> <li>I put my code into <a href="http://jsfiddle.net/2JfyX/4/" rel="nofollow">http://jsfiddle.net/2JfyX/4/</a> but the behavior was normal - no extra <code>Object</code> inside <code>colorPalettes</code>.</li> </ol> <p><strong>Edit 1: <br/></strong></p> <p>I also tried to put a string inside <code>amounts</code> instead of its current <code>int</code>.</p> <p><strong>Edit 2: <br/></strong> Tried to simulate adding a jQuery click event as in my code, was not able to reproduce <a href="http://jsfiddle.net/2JfyX/19/" rel="nofollow">http://jsfiddle.net/2JfyX/19/</a></p> <p><strong>Edit 3: <br/></strong> I believe I have found the culprit. It is g.Raphael. For some reason (didn't delve into their code yet), it makes changes to the object I pass to it <br/></p> <p>You can see that I directly pass <code>colorPalettes</code> to r.piechart and in the 6th loop it changes my array to contain an object. Not nice :-O</p> <p>I will clone the arrays from now on and hope for the best...</p> <pre><code>function renderPalettes(colorPalettes, radius) { var gap = radius + 20; for (var palette in colorPalettes) { var paletteObj = r.piechart(gap, 43, radius, colorPalettes[palette].amounts, { colors: colorPalettes[palette].colors, stroke: "#cdcdcd", strokewidth: '0.3' }); for (var i = 0; i &lt; paletteObj.series.items.length; i++) { paletteObj.series.items[i].node.setAttribute('class', palette + ' sliderPalette'); } gap = gap + radius * 2 + 24; } } </code></pre> <p>Any idea? Thanks, D.</p>
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      1. POStrange behavior with a Javascript array, object and RaphaelJS
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    1. COConsole.log your colorTest and you will see the [`__proto__`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/proto) object in jsFiddle too
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    2. COIn Javascript, arrays are a type of object.
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    3. COIt is not the same for colors because you instantiate the first item in the array with a string value.
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      1. UScrad
 

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