backbone.js集合比较器comparator backbone.js集合比较器comparator|

在Backbone.js中，比较器属性用于按排序顺序维护集合。默认情况下，没有用于集合的比较器。
句法：

collection.comparator

让我们举个例子。
请参阅以下示例：

< !DOCTYPE html> < head> < title>Comparator Collection Example< /title> < script src="http://img.readke.com/220416/052IB5H-0.jpg" type="text/javascript">< /script> < script src="http://img.readke.com/220416/052I643b-1.jpg" type="text/javascript">< /script> < script src="http://img.readke.com/220416/052I61242-2.jpg" type="text/javascript">< /script> < /head> < body> < script type="text/javascript"> var MyModel = Backbone.Model.extend(); //'LangNames' is a model name//'mydata' variable contains values to be displayed in sorted order var mydata = http://www.srcmini.com/[ {id:4, name:'Sachin Tendulkar'}, {id:2, name: 'Rahul Dravid'}, {id:3, name: 'Saurav Ganguly'} ]; //'myval' is a collection instance and includes array of values stored in 'mydata' variable var myval = new Backbone.Collection(mydata, { model:MyModel, //The model 'MyModel' is specified by overriding the "model" property comparator: 'name'//The 'comparator' maintain the collection in sorted order }); //Here, displaying the array of values using collection instance 'myval' and 'models' method document.write("The sorted (based on name) order of collection: ", JSON.stringify(myval) ); < /script> < /body> < /html>

输出：
【backbone.js集合比较器comparator】将以上代码保存在compare.html文件中，并在新的浏览器中打开该文件。