Reverse sort order with Backbone.js

Question

With Backbone.js I\'ve got a collection set up with a comparator function. It\'s nicely sorting the models, but I\'d like to reverse the order.

How can I sort the m

Answer 1

Modify your comparator function to return some reversely proporitional value instead of returning the data that you are currently. Some code from : http://documentcloud.github.com/backbone/#Collection-comparator

Example:

var Chapter  = Backbone.Model;
var chapters = new Backbone.Collection;

/* Method 1: This sorts by page number */
chapters.comparator = function(chapter) {
  return chapter.get("page");
};

/* Method 2: This sorts by page number in reverse */
chapters.comparator = function(chapter) {
  return -chapter.get("page");
};

chapters.add(new Chapter({page: 9, title: "The End"}));
chapters.add(new Chapter({page: 5, title: "The Middle"}));
chapters.add(new Chapter({page: 1, title: "The Beginning"}));