Array of Arrays creation question

**JMRKER** · 11-22-2012, 01:46 PM

In the following script, the 'choices' array is defined correctly.
It also displays as expected with the showArray() function.

I was experimenting to see if I could dynamically create a similiar array of array (picks),
but I'm having difficulty with my syntax.

I highlighted the commands I believe are not correct in RED.
Does anyone have an idea how I can duplicate the 'choices' array into the 'pick' array.

Code:

<html>
<body>
<form id="drop_list" onsubmit="return false">
 <button onclick="showArray(choices)">Choice display</button>
 <button onclick="showPicks()">Picks display</button>
</form>

<script type="text/javascript">
    var choices = [  // an array OF arrays */
        [ "AK", "Alaska" ],
        [ "AL", "Alabama" ],
        [ "AR", "Arkansas" ],
        [ "AZ", "Arizona" ],
        [ "CA", "California" ],
        [ "FL", "Florida" ],
        [ "GA", "Georgia" ],
        [ "TX", "Texas" ],
        [ "VT", "Vermont" ]  // Note: No comma after last entry
    ];

// want to create above array of arrays from strings below
  var picks = [];
  var arrStates = [
      "AK:Alaska",      "AL:Alabama",      "AR:Arkansas",    "AZ:Arizona",
      "CA:California",  "FL:Florida",      "GA:Georgia",     "TX:Texas",      "VT:Vermont" ];

// following is NOT used at this time.
//  var strStates = "AK:Alaska|AL:Alabama|AR:Arkansas|AZ:Arizona|CA:California|FL:Florida|GA:Georgia|TX:Texas|VT:Vermont";
  
function showPicks() {
  var tarr = [];
  for (var i=0; i<arrStates.length; i++) {
    tarr = arrStates[i].split(':');
    picks.push([tarr[0]],[tarr[1]]);        // this does not appear to work as desired
//    picks.push([tarr[0]]+','+[tarr[1]]);  // neither does this
  }
  showArray(picks);
}
function showArray(arr) {
  var abb = sta = '';
  for (var i=0; i<arr.length; i++) { abb += arr[i][0]+'\n'; }
  for (var i=0; i<arr.length; i++) { sta += arr[i][1]+'\n'; }
  alert(arr.join('\n')+'\n\n'+abb+'\n\n'+sta);
}
</script>
</body>
</html>

**Vince616** · 11-22-2012, 03:23 PM

Hi bud
You seem to have an extra set of square brackets in your push which is adding two elements to your array rather than the array if you change it to

Code:

    picks.push([tarr[0],tarr[1]]);

You could simplify a little more by doing

Code:

      picks.push(arrStates[i].split(':'));

This means that you could get rid of your temporary “tar” array.

Hope this helps

V

**JMRKER** · 11-22-2012, 09:41 PM

Thank you very much.
That was the syntax I was looking for.

I may have been close with my attempt,
but close only counts in horseshoes and handgranades.

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