BackboneJS collection.reset()方法
发布于 2015-08-14 15:24:21 | 160 次阅读 | 评论: 0 | 来源: 网络整理
重置集合并用新模型填充数组或将清空整个集合。
语法
collection.reset(models,options)
参数:
- models: 包含的集合实例的名称，这是需要被复位的集合。
- options: 选项包括空值清空集合。
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 'C_Name' is a model name and includes default value
var C_Name = Backbone.Model.extend({
defaults: {
country: "sachin"
}
});
//'PlayersCollection' is an instance of collection and model 'C_Name' is specified by using model property
var PlayersCollection = Backbone.Collection.extend({
model: C_Name
});
//The 'country1' and 'country2' are the instances of the model 'C_name'
var country1 = new C_Name({country: "australia"});
var country2 = new C_Name({country: "england"});
//Add the model instances to the collection using 'mycollection' collection instance
var mycollection = new PlayersCollection();
mycollection.add([country1,country2]);
//The 'length' property defines length of the collection
document.write('Number of added countries: ' + mycollection.length);
document.write("<br>");
//Here, the reset() method resets the collection otherwise empties the collection
mycollection.reset();
document.write('Number of countries after reset: ' + 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：
-
保存上述代码在文件reset.html
-
在浏览器打开这个HTML文件。
