Question

How to add For loop information to Multi-Dimensional Array?
http://jsfiddle.net/MZj3L/
If I am trying this code get – map undefined. But how to save data something like to this ->

[[Array[10], [Array[10], [Array[10], [Array[10], [Array[10], [Array[10], [Array[10], [Array[10], [Array[10], [Array[10]]

Thanks and sorry for my English language.

Answer 1

It seems in you want to initialize a multi dimensional array. Arrays are dynamic in JavaScript, you don’t have to initialize them with a certain length. You could just do:

var map = [];

for(var a = 0; a < 10; a++){
    map[a] = [];
}

This gives you an array containing 10 arrays.

---

Why are you getting undefined?

Because your syntax is way of. What map = [a][b]; does is creating an array with one element a and then accessing the bth element of that array and assign it to map.

So in the last iteration, it does:

map = [9][9];

which is the same as

tmp = [9];
map = tmp[9];