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backbone.js集合get

本文概述

Backbone.js集合的get方法用于从集合中检索模型,该模型由id,Cid或传入模型指定。

句法:

collection.get(id)

参数说明

id:用于从集合中获取模型。

让我们举个例子。

请参阅以下示例:

<!DOCTYPE html>
   <head>
      <title>Get 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">
         var MyCollection = new Backbone.Collection();

         //The on() method binds callback function to 'MyCollection' instance and invokes whenever an event triggers
         MyCollection.on("change:title", function(model) {

            //When event triggers, it retrieves the title from the collection
            document.write("srcmini-- " + model.get('title'));
         });
         MyCollection.add({id: 2});  //adds id value as 2 in the collection

         //The 'myvalues' object gets the 'MyCollection' with id = 2
         var myvalues = MyCollection.get(2);

         //Sets the value for the title
         myvalues.set('title', 'A Solution of All Technology.');
         </script>
         </body>
      </html>

输出:

将以上代码保存在get.html文件中,然后在新的浏览器中打开该文件。

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