es6(8)--对象

 1 //对象
 2 {
 3     //简洁表示法
 4     let o = 1;
 5     let k = 2;
 6     let es5 = {
 7         o:o,
 8         k:k
 9     };
10     let es6 = {
11         o,
12         k
13     };
14     console.log(es5);
15     console.log(es6);
16 
17     let es5_method={
18         hello:function(){
19             console.log('hello')
20         }
21     }
22     let es6_method={
23         hello(){
24             console.log('es6 hello')
25         }
26     }
27     es5_method.hello();
28     es6_method.hello();
29 
30 }
31 {
32     //属性表达式
33     let a='b';
34     let es5_obj={
35         a:'c'
36     };
37     let es6_obj={
38         [a]:'c'//b:'c'
39     }
40     console.log(es5_obj)
41     console.log(es6_obj)
42 }
43 {
44     //新增API,Object.is就是===
45     console.log('字符串',Object.is('abc','abc'),'abc'== 'abc')
46     console.log('数组',Object.is([],[]),[]==[])
47     //Object.assign浅拷贝
48     console.log('拷贝',Object.assign({a:'a'},{b:'b'}))
49     //
50     let test ={k:123,o:456}
51     for(let [key,value] of Object.entries(test)){
52         console.log([key,value])
53     }
54     
55 }
56 //基本不支持
57 {
58     //扩展预算符...
59     //let {a,b,...c}={a:'test',b:'kill',c:'ddd',d:'ccc'};
60 
61 }