它类似于remove()方法,使用模式数组,并从集合中删除模型。
语法
collection.pop(models, options)
参数:
- models: 包含的集合实例,这是要从集合中弹出来的名称。
- options: 包括从集合中删除模型类型。
示例
<!DOCTYPE html> <head> <title>Collection Example</title> <script src="https://code.jquery.com/jquery-2.1.3.min.js" type="text/javascript"></script> <script src="https://cdnjs.cloudflare.com/ajax/libs/underscore.js/1.8.2/underscore-min.js" type="text/javascript"></script> <script src="https://cdnjs.cloudflare.com/ajax/libs/backbone.js/1.1.2/backbone-min.js" 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: "england"}); 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); mycollection.pop(country2); mycollection.pop(country3); document.write('Number of popped countries : ' + mycollection.length); </script> </body> </html>
输出
让我们进行以下步骤来看看上面的代码工作:
-
保存上述代码到文件pop.html
-
在浏览器打开这个HTML文件。