Javascript array index error

Question

I am trying to access to a simple nested Array, doing this:

var currMenu = 1;
    while ( currMenu < menu.length ) {
        alert(currMenu);
        alert(menu[0][currMenu].text);
        currMenu++;
}

Despite alerts are throwing the correct values, I am getting this error on firebug: TypeError: menu[0][currMenu] is undefined.

What is happening?

Thanks!

Edit: Sorry, I was rushing, here you have the "menu" structure:

menu[0] = new Array();
menu[0][0] = new Menu(false, '', 15, 50, 20, '','' , 'navlink', 'navlink');
menu[0][1] = new Item('someText', '#', '', 100, 10, 1);

And the object Item:

function Item(text, href, frame, length, spacing, target) {
    this.text = text;
    if (href == '#') {
        this.href = '#';
    } else if (href.indexOf('http') == 0) {
        this.href = href;
    } else this.href = href;
    this.frame = frame;
    this.length = length;
    this.spacing = spacing;
    this.target = target;
    // Reference to the object's style properties (set later).
    this.ref = null;
    this.showLoadingBar = false;
}

Now what do we know about menu value?

Michael Krelin - hacker
– Michael Krelin - hacker

2012-09-20 14:02:32 +00:00
Commented Sep 20, 2012 at 14:02 — Michael Krelin - hacker
– Michael Krelin - hacker, Commented Sep 20, 2012 at 14:02
sure you dont mean menu[currMenu].text ?

Alex K.
– Alex K.

2012-09-20 14:02:39 +00:00
Commented Sep 20, 2012 at 14:02 — Alex K.
– Alex K., Commented Sep 20, 2012 at 14:02
Sorry again, there is more data and object structure

Leandro Cusack
– Leandro Cusack

2012-09-20 14:18:22 +00:00
Commented Sep 20, 2012 at 14:18 — Leandro Cusack
– Leandro Cusack, Commented Sep 20, 2012 at 14:18

Denys Séguret · Accepted Answer · 2012-09-20 14:02:35Z

3

Assuming your menu is coherent with the [0][currMenu], you should access it like this :

while ( currMenu < menu[0].length ) {
    alert(currMenu);
    alert(menu[0][currMenu].text);

answered Sep 20, 2012 at 14:02

Denys Séguret

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Comments

Pointy · Accepted Answer · 2012-09-20 14:02:46Z

1

You're looking at the length of the "menu" array, but you're accessing the array at the zero-th index of that array (which may or may not be an array; I can't tell from the code you've posted).

answered Sep 20, 2012 at 14:02

Pointy

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