BackboneJS collection.pop()方法
发布于 2015-08-14 15:26:24 | 80 次阅读 | 评论: 0 | 来源: 网络整理
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。
