Question

153

How do you easily create empty matrices javascript?

rated 0 times [ 157] [ 4] / answers: 1 / hits: 183656 / 13 Years ago, mon, november 28, 2011, 12:00:00

In python, you can do this:

[([None] * 9) for x in range(9)]

and you'll get this:

[[None, None, None, None, None, None, None, None, None],

 [None, None, None, None, None, None, None, None, None],

 [None, None, None, None, None, None, None, None, None],

 [None, None, None, None, None, None, None, None, None],

 [None, None, None, None, None, None, None, None, None],

 [None, None, None, None, None, None, None, None, None],

 [None, None, None, None, None, None, None, None, None],

 [None, None, None, None, None, None, None, None, None],

 [None, None, None, None, None, None, None, None, None]]

How can I do the equivalent in javascript?

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eddiejoshb

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4 Years ago

answered 13 Years ago stefanicarolinat · Accepted Answer

var matrix = [];

for(var i=0; i<9; i++) {

    matrix[i] = new Array(9);

}

... or:

var matrix = [];

for(var i=0; i<9; i++) {

    matrix[i] = [];

    for(var j=0; j<9; j++) {

        matrix[i][j] = undefined;

    }

}