EmberJS - random collection. Stolen from: https://coderwall.com/p/jmcxqg

SortedArrayController.js

Ember.SortedArrayController = Ember.ArrayController.extend({
  sortOrder: "normal",
  sortFunction: null,
  inputCollectionName: "content",
  outputCollectionName: "content",
  maxCollectionSize: -1,
  init: function() {
    this.set(this.inputCollectionName, []);
    this.addObserver(this.inputCollectionName + '.@each', function() {
      return this.elementAdded();
    });
    return this.addObserver(this.outputCollectionName + '.@each', function() {
      return this.trimArray();
    });
  },
  elementAdded: (function() {
    var content, context;
    context = this;
    content = this.get(this.inputCollectionName);
    if (this.sortOrder === "normal") {
      if (this.sortFunction != null) {
        content.sort(function(a, b) {
          return context.sortFunction(a, b);
        });
      } else {
        content.sort();
      }
    } else if (this.sortOrder === "reverse") {
      if (this.sortFunction != null) {
        content.sort(function(a, b) {
          return context.sortFunction(b, a);
        });
      } else {
        content.reverse();
      }
    } else if (this.sortOrder === "random") {
      content.sort(function(a, b) {
        return 0.5 - Math.random("deadbeef");
      });
    }
    return this.set(this.outputCollectionName, content);
  }),
  trimArray: (function() {
    var content;
    content = this.get(this.outputCollectionName);
    if ((this.maxCollectionSize > 0) && (content.length > this.maxCollectionSize)) {
      return this.set(this.outputCollectionName, content.slice(0, this.maxCollectionSize - 1));
    }
  })
});

window.myArray = Ember.SortedArrayController.create();

myArray.content.pushObjects(["Jack", "Cassandra", "Raj"]);

window.myArray2 = Ember.SortedArrayController.create({
  sortOrder: "reverse"
});

myArray2.content.pushObjects(["Jack", "Cassandra", "Raj"]);

window.myArray3 = Ember.SortedArrayController.create({
  sortOrder: "random"
});

myArray3.content.pushObjects(["Jack", "Cassandra", "Raj"]);