声明二维数组是否有捷径？

Question

I am working with 2 dimensional arrays and I need a way to declare the number of inner arrays. Right now I'm using something like this:

var purchasePermutationP0Array = [[],[],[],[],[],[],[],[],[],[],[],[],[],[],[],[],[],[],[],[],[],[],[],[],[],[],[],[]];

which has 28 inner brackets. What I want is to be able to declare how many inner brackets there are without using so many "[]". Is there a way to do that in javascript? Something like:

var purchasePermutationP0Array = [new Array [28]]?

Thanks for your help.

Answer 1

You can use a while loop-

var i=0, purchasePermutationP0Array = [];
while(i++<28)purchasePermutationP0Array.push([]);