jquery - javascript remove array from array

Question

Assume we have the following arrays:

a = [1, 2, 3, 4, 5]

and

b = [2, 3]

How can I subtract b from a? So that we have c = a - b which should be equal to [1, 4, 5]. jQuery solution would also be fine.

Answer 1

Assuming you're on a browser that has Array.prototype.filter and Array.prototype.indexOf, you could use this:

var c = a.filter(function(item) {
    return b.indexOf(item) === -1;
});

If the browser in question does not have those methods, you may be able to shim them.