Does anyone know why this gives an error? I've been trying at it way too long and I can't seem to figure it out. It errors with "cannot read property 0 of undefined", but it is clearly defined. (or so I think)

var categorySix = [["test"]["test2"],["testing"]["one"],["two"]["three"]];
document.write(categorySix[0][0]);

Does anyone know why this gives an error? I've been trying at it way too long and I can't seem to figure it out. It errors with "cannot read property 0 of undefined", but it is clearly defined. (or so I think)

var categorySix = [["test"]["test2"],["testing"]["one"],["two"]["three"]];
document.write(categorySix[0][0]);

• javascript
• multidimensional-array

• Please remember to mark an answer as accepted if your issue is resolved. – Drazisil Commented Jul 6, 2011 at 14:34

3 Answers 3

var categorySix = [["test","test2"],["testing","one"],["two","three"]];

Your syntax is off.

You are declaring your 2D array wrong.

Try this :

var categorySix = [["test","test2"],["testing","one"],["two","three"]];

You are not correctly creating the array.

I believe it should be

var categorySix = [["test","test2"],["testing","one"],["two","three"]];
document.write(categorySix[0][0]);

As per How can I create a two dimensional array in JavaScript?