Rotate the elements in an array in JavaScript

Question

I was wondering what was the most efficient way to rotate a JavaScript array.

I came up with this solution, where a positive n rotates the array to the

Answer 1

I would probably do something like this:

Array.prototype.rotate = function(n) {
    return this.slice(n, this.length).concat(this.slice(0, n));
}

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Edit    Here’s a mutator version:

Array.prototype.rotate = function(n) {
    while (this.length && n < 0) n += this.length;
    this.push.apply(this, this.splice(0, n));
    return this;
}