Sort array by firstname (alphabetically) in Javascript

Question

I got an array (see below for one object in the array) that I need to sort by firstname using JavaScript. How can I do it?

var user = {
   bio: null,
   emai         


        

Answer 1

Pushed the top answers into a prototype to sort by key.

Array.prototype.alphaSortByKey= function (key) {
    this.sort(function (a, b) {
        if (a[key] < b[key])
            return -1;
        if (a[key] > b[key])
            return 1;
        return 0;
    });
    return this;
};