Converting a string to a multi-dimensional array

Question

I have a nested for loop that creates a empty string value that represents a multidimensional array. Once the for loops have finished the result is something like this:

"[[0,0,0,0],[0,0,0,0]]"

I would like to add this to a multidimensional array within my code, how would i do this?

I have tried:

map = eval("[[0,0,0,0],[0,0,0,0]]");

but this does not produce the correct multidimensional array i am looking for.

I am looking to be able to use the array like this:

map[0][1] == 1;

Thanks

What produces the initial string? What is consuming it? Have you worked with JSON before? — Michael Haren
– Michael Haren, Commented Aug 7, 2012 at 16:25
JSON.parse() will return the array as you want it. But why is it a string in the first place if you generated it in code? — Michael Berkowski
– Michael Berkowski, Commented Aug 7, 2012 at 16:26

Sirko · Accepted Answer · 2012-08-07 16:27:07Z

3

You could parse the string using JSON.parse() (MDN docu).

var str = "[[0,0,0,0],[0,0,0,0]]";

var map = JSON.parse( str );

However, in your example there is no entry equaling 1, so you requirement map[0][1] == 1 wont be fulfilled that way.

answered Aug 7, 2012 at 16:27

Sirko

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1 Comment

Glen Robson Over a year ago

I realise that there is no 1 in the array shown. I just made that string up to give an example of what it will look like. And thank you for the example it worked perfectly!

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