Javascript "Cannot set property" of 3d array

Question

I trying to set value in 3d javascript array...

var a = [];
var b = [];
var c = [];
var array = [a,b,c];
array[0][0][0] = 'value';

This code return error: "Cannot set property '0' of undefined" but 2d array working normally:

var a = [];
var b = [];
var array = [a,b];
array[0][0] = 'value';

Don't you see that [a,b,c] is simply an array with three elements? Imagine it would be [1, 2, 3]. — Felix Kling
– Felix Kling, Commented Nov 15, 2013 at 21:52

tymeJV · Accepted Answer · 2013-11-15 21:30:23Z

2

That's not a 3D array, thats a 2D array, literally translated to:

[[],[],[]]

answered Nov 15, 2013 at 21:30

tymeJV

105k14 gold badges165 silver badges158 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

jko · Accepted Answer · 2013-11-15 21:36:14Z

2

in your first example you do not have a 3-dimensional array. what you have is [[],[],[]] - an array with 3 parallel arrays in it. this is why you can not access array[0][0][0] since the deepest you get is 2 levels. this is why your code in the second example works.

I think you got confused with the arrays at all. maybe you should read about programming, arrays and the whole idea again?

If you want to have an array with 3 leves, this is a nice example: an array in an array which is in an array itself

var a3l_a = [[[]]];
// equals:
var a3l_b = new Array(new Array(new Array()));

answered Nov 15, 2013 at 21:36

jko

2,09614 silver badges25 bronze badges

Collectives™ on Stack Overflow

Javascript "Cannot set property" of 3d array

2 Answers 2

Comments

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Related