反向排序与Backbone.js的 [英] reverse sort order with Backbone.js

问题描述

使用 Backbone.js的我有一个集合设置了一个比较器功能。它是很好的排序模型，但我想颠倒顺序。我怎样才能拥有的车型上的下降，而不是上升的方式来分类的？

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 have the models be sorted in a descending rather than ascending manner?

推荐答案

好了，你可以从比较返回负值。如果我们从骨干网的网站，例如，例如，想颠倒顺序，它看起来是这样的：

Well, you can return negative values from comparator. If we take, for example, the example from Backbone's site and want to reverse the order, it will look like this:

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

chapters.comparator = function(chapter) {
  return -chapter.get("page"); // Note the minus!
};

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"}));

alert(chapters.pluck('title'));

这篇关于反向排序与Backbone.js的的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！