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Delayed array population possible?

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Aug 21.2006

I would like to know if there is anyway to delay the population of an array using javascript. The sequence of what I want to do is:

  • 1. Start HTML site

  • 2. Define: var AnyArray = new Array();

  • 3. Be able to click on button that fills the ‘AnyArray’ with the contents of an external.js file that contains only data (no functions)

    • In otherwords, the array would normally be initialize as blank,
    then I could
    a. fill as needed with operator entered information and jump to step c. below

    b. or click on a button to fill the array with previously saved information that I can then modify with other operator information.

    c. and finally, I could then copy and paste the contents of the AnyArray that I write to a <textarea> element.

    My problem is that I don’t know how to define the array in the initial HTML file so that when I load the external.js file (that overwrites the AnyArray information) I don’t get an error with duplicate definitions. Any ideas? ?

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    JavaScript

    2 Comments(s) ↴

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    @EricWAug 21.2006 — Look into Ajax, if the external.js is dynamic or there are too many permutations to preload. If it is small amount of static data just load a bunch of functions to load your array and manipulate the textarea.
    Copy linkTweet thisAlerts:
    @JMRKERauthorAug 22.2006 — Here is an example: ?

  • 1. The 'External.js' file load correctly when script is started.

  • 2. The Show button verifies the file loaded

  • 3. The Clear AnyArray button clears the loaded information

  • 4. The Show button verifies the array is cleared

    BUT

  • 5. How do I re-load the 'External.js' file again (with out browser refresh) ???


    • Contents of 'External.html' demo HTML
    [code=php]
    <html>
    <head>
    <title>Load External.JS File</title>
    <script type="text/javascript" src='External.js'></script>
    <script type="text/javascript">
    <!--
    function LoadJSfile() {
    // WHAT DO I DO HERE TO GET 'External.js' CONTENTS AGAIN ?????
    // AFTER CLEARING ARRAY TO NULL ?????

    }
    function ShowJSfile() {
    document.getElementById('TA').value = "";
    var str = "";
    for (i=0; i<AnyArray.length; i++) {
    str += AnyArray[i]+"n";
    }
    document.getElementById('TA').value = str;
    }
    //-->
    </script>
    </head>
    <body>
    <textarea id="TA" rows="8" cols="40" wrap="off"></textarea>
    <br />
    <button onClick="ShowJSfile()">Show 'External.js' file</button>
    <button onClick="document.getElementById('TA').value=''";>Clear Text</button>
    <br />
    <button onClick="AnyArray=[]";>Clear AnyArray</button>
    <button onClick="LoadJSfile()">Re-Load 'External.js' file</button>
    </body>
    </html>
    [/code]
    Contents of 'External.js'
    [code=php]
    // External.js
    var AnyArray = new Array();

    AnyArray[0] = 'First line of external.js file';
    AnyArray[1] = 'More information';
    AnyArray[2] = 'Last line of external.js file';
    [/code]

    Any ideas are appreciated as to how to re-load the external information.
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