ES6 实用技巧：替代 Lodash 的四个常用场景

const obj = {
 a:1,
 b:2,
 c:3,
 d:4
};

// 获取obj中a与b的值
const {a,b} = obj;

// 也可以给他们取别名
const {a:A, b:B} = obj;

const obj = {
 a:1,
 b:2,
 c:3,
 d:4
}

// 我们想要获取除了a之外的所有属性
const {a, ...other} = obj

const objs = [
{name:'lilei', score: 98},
{name:'hanmeimei', score: 95},
{name:'polo', score: 85},
...
]

const scoreTotal = objs.reduce( (total, obj) => {
 return obj.score + total;
}, 0 /*第二个参数是total的初始值*/)

const arr = [1,2,3,4,...]

const queue = arr.map(async item => {
 return item + 1;
})

Promise.all(queue).then(newArr => console.log(newArr))