Javascript array undefined in for loop

Question

I have a problem with a javascript array: "arrFinal[i] is undefined"

In my script arrFinal is dynamically generated

function fillTextareas () {
var arrFinal = [];
arrFinal[0] = [];

....
....
// Then some code that define the content of arrFinal, the length of arrFinal ( tailleArrFinal, tailleArrSubFinal)
....
....


for(i=0;i<=tailleArrFinal;i++){
        for(j=0;j<tailleArrSubFinal;j++) {
            $("form textarea#t" + i + "_" + j).val(arrFinal[i][j]);
        }
    }
}

When the function is called, a dump show me that the array arrFinal is correctly fill and the script works but i have an alert "arrFinal[i] is undefined". How can i do that without alert ? Thanks !!

Where is that alert you are calling... ?

Talha Ahmed Khan
– Talha Ahmed Khan

2011-07-04 12:28:39 +00:00
Commented Jul 4, 2011 at 12:28 — Talha Ahmed Khan
– Talha Ahmed Khan, Commented Jul 4, 2011 at 12:28

Alnitak · Accepted Answer · 2011-07-04 12:34:58Z

3

It looks like an off-by-one error in the outer loop.

It should be i < tailleArrFinal, not <=.

answered Jul 4, 2011 at 12:34

Alnitak

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Comments

daveoncode · Accepted Answer · 2011-07-04 12:51:37Z

1

By looking at your loop I can see at least 2 errors: you miss "var" and ".length" (you have to test for array length!)

try to replace:

for(i=0;i<=tailleArrFinal;i++){
        for(j=0;j<tailleArrSubFinal;j++) {
            $("form textarea#t" + i + "_" + j).val(arrFinal[i][j]);
        }
    }
}

with:

for(var i=0;i<tailleArrFinal.length;i++){
        for(var j=0; j<tailleArrSubFinal.length; j++) {
            $("form textarea#t" + i + "_" + j).val(arrFinal[i][j]);
        }
    }
}

edited Jul 4, 2011 at 12:51

answered Jul 4, 2011 at 12:45

daveoncode

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