Backbone.js collection.where()用法及代碼示例

Backbone.js 集合 where 方法通過使用集合中匹配的屬性來檢索和顯示模型。

用法:

collection.where(attribute)

參數說明：

attributes:它指定已定義模型的屬性。

我們舉個例子來部署 where 方法。

看這個例子：

<!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>

輸出：

將上述代碼保存在 where.html 文件中，然後在新瀏覽器中打開此文件。

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