Question

118

How to define Global Arrays?

rated 0 times [ 123] [ 5] / answers: 1 / hits: 71037 / 12 Years ago, mon, april 9, 2012, 12:00:00

Code example:

 <script>

      var data = new Array();

      data[0] = 'hi';

      data[1] = 'bye';

 </script>



 <script>

      alert(data[0]);

 </script>

This gives the following error: data is not defined

How do you make something like this work? Especially if the first <script> block is being loaded on the page by ajax, and the second block is working from it. jQuery solution is acceptable.

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jarettajb

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answered 12 Years ago walker · Accepted Answer

New is not a keyword.

Use:

var data = new Array();

Or, more succinctly:

var data = [];

After your edit you mention that the first script block is loaded asynchronously. Your code will not work as written. data is a global variable, once it is loaded onto the page. You need to use a callback pattern to properly execute the code.

Since you haven't posted the asynchronous code I am not going to provide a callback sample. Though, a quick solution follows:

var interval = setInterval(function(){

    if(data) {

        /* ... use data ... */

        clearInterval(interval);

    }

}, 500);