（三）backbone - API源码 - v0.9.2 与 v1.1.2区别

1 viewOptions = [‘model‘, ‘collection‘, ‘el‘, ‘id‘, ‘attributes‘, ‘className‘, ‘tagName‘];
2 _.extend(this, _.pick(options, viewOptions));
3 
4 // 使用_.pick函数，只能导出viewOptions里对应的属性

 1 var contact1Model = new Backbone.Model({id:01,FirstName: ‘John‘,lastName: ‘Doe‘,phone: ‘1-111-1111‘
 2 });
 3 var contacts = new Backbone.Collection(contact1Model);
 4 //以下全部返回一个引用到联系人集合中的contact1Model
 5 //使用get()
 6 console.log(contacts.get(contact1Model));
 7 console.log(contacts.get(01));
 8 console.log(contacts.get(‘c1‘));
 9  
10 //使用at()
11 console.log(contacts.at(0));
12  
13 //使用findWhere()
14 console.log(contacts.findWhere({lastName:‘Doe‘}));
15  
16 //注意每一个方法返回一个引用到contact1Model
17 console.log(contacts.get(contact1Model) === contact1Model);
18 console.log(contacts.get(01) === contact1Model);
19 console.log(contacts.get(‘c1‘) === contact1Model);
20 console.log(contacts.at(0) === contact1Model);
21 console.log(contacts.findWhere({lastName:‘Doe‘}) === contact1Model);