Object.assign可以合并具有相同属性的对象，对象去重
let a = {
name: 'kate',sex:'男' }
let c = {
b:'b'}
let d = {
c: '77'}
let other = Object.assign({
},a,{
name:"kaifan"},d)
console.log(other) // { name: 'kaifan', sex: '男', c: '77', b: 'b' }