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POJavascript Scoping Issue or Instantiation Issue?
 

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  1. POJavascript Scoping Issue or Instantiation Issue?
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    <p>I have a webpage that does some calculations on the fly based on user 'keyup' events in a text input field. It's a rather large page that is built dynamically, so I have to keep a Hash/Array of values that I can reference from other locations within the page.</p> <p>So at the top of the page I am doing this -</p> <pre><code>var itemBalanceHash = new Array(); var itemID_2_POIDHash = new Array(); var currentPODocumentID; var warningArray = new Array(); </code></pre> <p>Then I go on to define a number of functions that use these variables I just defined. However, it is not until after I finish defining these functions that these variables start getting used (i.e. filled with stuff.)</p> <pre><code>&lt;script type="text/javascript"&gt; itemBalanceHash["${topitem.itemIdentifier}"]="${topitem.itemOutstandingEncumberedAmount}"; itemID_2_POIDHash["${topitem.itemIdentifier}"] = currentPODocumentID; &lt;/script&gt; </code></pre> <p>This script block appears in the middle of my page as it is getting built. In fact, it gets called multiple times depending on how many rows I need to fill (a result set of a query from the database).</p> <p>Anyhow - This works great in Firefox. However, it does not work in IE8, Chrome or Safari. I haven't tested this in older versions of IE; but I assume it will not work there either.</p> <p>The error message Internet Explorer Debugger is giving me is this</p> <p>"itemBalanceHash is undefined"</p> <p>So, my question: Is this a scoping issue?<br> Firefox seems to have corrected my error somewhere, but where?</p> <p>I can provide more code if necessary. Thanks for your help!<br> It is most appreciated!</p>
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    1. USivan_drago
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    1. COIs the top script only those four lines? How is it included?
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      1. POJavascript Scoping Issue or Instantiation Issue?
      1. USBergi
    2. COYou could use [`{}` (shorthand for `new Object()`)](https://developer.mozilla.org/en/JavaScript/Guide/Working_with_Objects#Using_object_initializers) instead of [`new Array()` (has a shorthand `[]`)](https://developer.mozilla.org/en/JavaScript/Guide/Values,_Variables,_and_Literals#Array_literals), since you don't actually need an array.
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      1. POJavascript Scoping Issue or Instantiation Issue?
      1. USEsailija
    3. COYou really should use objects (`{}`) for the hashes, javascript Arrays are for number-indexed arrays [only].
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      1. USBergi
 

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