Array.prototype.range

Array.prototype.range = function(a, b, step) {
step
= !step ? 1 : step;
b
= b / step;
for(var i = a; i <= b; i++) {
this.push(i*step);
}
return this;
};

var myarray = [];
myarray
.range(0, 10, 2); // returns 0, 2, 4, 6, 8, 10