es6(8)--对象

//对象
{
    //简洁表示法
    let o = 1;
    let k = 2;
    let es5 = {
        o:o,
        k:k
    };
    let es6 = {
        o,
        k
    };
    console.log(es5);
    console.log(es6);

    let es5_method={
        hello:function(){
            console.log('hello')
        }
    }
    let es6_method={
        hello(){
            console.log('es6 hello')
        }
    }
    es5_method.hello();
    es6_method.hello();

}
{
    //属性表达式
    let a='b';
    let es5_obj={
        a:'c'
    };
    let es6_obj={
        [a]:'c'//b:'c'
    }
    console.log(es5_obj)
    console.log(es6_obj)
}
{
    //新增API,Object.is就是===
    console.log('字符串',Object.is('abc','abc'),'abc'== 'abc')
    console.log('数组',Object.is([],[]),[]==[])
    //Object.assign浅拷贝
    console.log('拷贝',Object.assign({a:'a'},{b:'b'}))
    //
    let test ={k:123,o:456}
    for(let [key,value] of Object.entries(test)){
        console.log([key,value])
    }
    
}
//基本不支持
{
    //扩展预算符...
    //let {a,b,...c}={a:'test',b:'kill',c:'ddd',d:'ccc'};

}