How to instantiate multidimensional array in typescript of fixed length?

Question

I am making an array of array (a grid) in typescript. I need this array to be 5x4. I am trying to understand how to instantiate it. I know I can do like this for a one dimension array:

let myvar:string[]=new Array(3);

I tried that way but it didn't work when I am trying to push an element. It is saying that my array has 0 line.

export class grid {

    public mainGrid: string[][];

public constructor() {

        this.mainGrid = new Array<Array<string>(5)>(4);
    }

}

Or should I push a new Array(5) for times?

Possible duplicate of Typescript - multidimensional array initialization — devlin carnate
– devlin carnate, Commented Aug 19, 2016 at 20:02
So 1st I instantiate the this.mainGrid = new Array<Array<string>>(); then I loop and push new Array<string>()? — John Doe the Doe
– John Doe the Doe, Commented Aug 19, 2016 at 20:09
@Ced: They are different. For example. An array of arrays can contain rows that are different lengths. — recursive
– recursive, Commented Aug 19, 2016 at 20:40

DIEGO CARRASCAL · Accepted Answer · 2016-08-19 21:00:00Z

-2

In JS you could do something like:

let elem = 0;//
let arr1 = [elem,elem,elem,elem];
let arr2 = [elem,elem,elem,elem];
let arr3 = [elem,elem,elem,elem];
let arr4 = [elem,elem,elem,elem];
let arr5 = [elem,elem,elem,elem];
let grid = [arr1, arr2, arr3, arr4, arr5];

but you will have to control that the length is not surpassed...

answered Aug 19, 2016 at 21:00

DIEGO CARRASCAL

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