"cannot read property 0 of undefined" in 2d array

Question

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]);

Please remember to mark an answer as accepted if your issue is resolved. — Drazisil, Jul 06 '11 at 14:34

score 6 · Accepted Answer · answered Jul 06 '11 at 14:22

6

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

Your syntax is off.

answered Jul 06 '11 at 14:22

James Montagne

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score 1 · Answer 2 · answered Jul 06 '11 at 14:23

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You are declaring your 2D array wrong.

Try this :

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

answered Jul 06 '11 at 14:23

leandre_b

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score 0 · Answer 3 · edited May 23 '17 at 12:19

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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?

edited May 23 '17 at 12:19

Community

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answered Jul 06 '11 at 14:25

Drazisil

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"cannot read property 0 of undefined" in 2d array

3 Answers3