backbone.js集合pop backbone.js集合pop|Backbone.js教程

本文概述

参数说明

Backbone.js集合pop方法类似于remove（）方法。它需要一组模型并从集合中删除模型。
句法：

collection.pop(models, options)

参数说明模型：它指定集合实例的名称，需要从
选项：它包含将从集合中删除的模型类型。
让我们举个例子。
请参阅以下示例：

< !DOCTYPE html> < head> < title>Pop Collection Example< /title> < script src="http://img.readke.com/220416/04391T363-0.jpg" type="text/javascript">< /script> < script src="http://img.readke.com/220416/04391V118-1.jpg" type="text/javascript">< /script> < script src="http://img.readke.com/220416/04391WW6-2.jpg" type="text/javascript">< /script> < /head> < body> < script type="text/javascript"> //The 'Player' is a model name and includes the default values var Player = Backbone.Model.extend({ defaults: { c_id:"", country: "" } }); //The 'PlayersCollection' is a collection instance and model 'Player' is specified by using model property var PlayersCollection = Backbone.Collection.extend({ model: Player }); //The 'country1', 'country2' and 'country3' are instances of the model 'Player' var country1 = new Player({c_id:1, country: "Australia" }); var country2 = new Player({c_id:2, country: "Canada"}); var country3 = new Player({c_id:3, country: "India"}); var mycollection = new PlayersCollection(); //Here, the push() method adds the above models to the collection mycollection.push(country1); mycollection.push(country2); mycollection.push(country3); document.write('Number of pushed countries : ' + mycollection.length); document.write("< br>"); //The pop() method removes the models from the collection mycollection.pop(country1); document.write('Number of popped countries : ' + mycollection.length); < /script> < /body> < /html>

输出：
【backbone.js集合pop】将以上代码保存在pop.html文件中，然后在新的浏览器中打开该文件。