How do I merge two arrays in JavaScript?

Question

Imagine I've got two arrays in JavaScript:

var geoff = ['one', 'two'];
var degeoff = ['three', 'four'];

How do I merge the two arrays, resulting in an array like this?

var geoffdegeoff = ['one', 'two', 'three', 'four'];

Answer 1

var geoffdegeoff = geoff.concat(degeoff);