Fixing an array index's out of range error

Question

Hi,
Am stuck in an eLearning project that I am working on and need some help fixing a 2007 error that seems to point to an index for an array being out of range.
Here is the previous posting where there are more details: http://forums.adobe.com/message/4685789#4685789
With much help (thank you once again kglad), the script looks like:
var index:int = 0;
var numToDisplay:int = 10;
var groupA:Array = ["1","2","3"]
var groupB:Array = ["4","5","6"]
var groupC:Array = ["7","8","9"]
var word_array:Array = [];
var i:int;
for(i=0;i<3;i++){
word_array.push(groupA[groupA.length*Math.random()]);
for(i=0;i<3;i++){
word_array.push(groupB[groupB.length*Math.random()]);
for(i=0;i<3;i++){
word_array.push(groupC[groupC.length*Math.random()]);
This is used in another part of the script:
function randomWord() {
    if(index<numToDisplay){
        wordT.text=word_array[index++];
        t.reset();
        t.start();
    } else {
  wordT.text= "";
    // display score
The error message (2007) points to:
wordT.text=word_array[index++];
When I trace (word_array)  I get
Out of range index for this array?
How can I fix this out of range index?
Any help appreciated.

Answer 1

Since there appear to be only 9 elements getting added to the array, and your numDisplay is set to be 10, your condition ( if(index<numToDisplay){ ) allows index++ to get to 10, which will be out of range for your array.  See if changing the value of numDisplay to 9 solves the problem.