Backbone.js collection.where()用法及代码示例

Backbone.js 集合 where 方法通过使用集合中匹配的属性来检索和显示模型。

用法:

collection.where(attribute)

参数说明：

attributes:它指定已定义模型的属性。

我们举个例子来部署 where 方法。

看这个例子：

<!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">
var players = new Backbone.Collection([
  {name:"Sachin",      job:"Cricketer"},
  {name:"Dhoni",    job:"Cricketer"},
  {name:"Bradman",     job:"Cricketer"},
  {name:"Ronaldo", job:"Footballer"},
]);

var Cricketer = players.where({job:"Cricketer"});
document.write("Total numbers of items that matches given attribute are:", +Cricketer.length);

      </script>
   </body>
</html>

输出：

将上述代码保存在 where.html 文件中，然后在新浏览器中打开此文件。

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注：本文由纯净天空筛选整理自 Backbone.js collection.where()。非经特殊声明，原始代码版权归原作者所有，本译文未经允许或授权，请勿转载或复制。