Question

Possible Duplicate:
Most efficient way to create a zero filled JavaScript array?

I wish to create an array in JS, the array will store integer value.

I would like to increment some of the values by 1, o at first I would like that each cell in the array would contain 0

Is it possible to do it in JS ?

Note: The array is of unknown size upon creation

Answer 1

Array.prototype.increaseAt = function(index){
    this[index] = this[index]+1 || 1
};
Array.prototype.getValueAt = function(index){
    return this[index] || 0;
};

Use it like:

var testArray = [];
testArray.increaseAt(3);
console.log(testArray.getValueAt(3)); // 1
console.log(testArray.getValueAt(1)); // 0