社会喵

数组去重实现

let person = [
	{id: 0, name: "小明"},
	{id: 1, name: "小张"},
	{id: 2, name: "小李"},
	{id: 3, name: "小孙"},
	{id: 1, name: "小周"},
	{id: 2, name: "小陈"},   
];
let obj = {};
person = person.reduce((cur,next)=>{
	if(!obj[next.id]){
		cur.push(next)
		obj[next.id]=next
	}
	return cur
},[])
console.log(person)

数组扁平化实现

var arrs = [1,2,3,[4],[5,6,[7]]]
function flat(arr){
	let arrs = []
	arr.forEach(i=>{i instanceof Array?arrs=arrs.concat(flat(i)):arrs.push(i)})
	return arrs
}
console.log(flat(arrs))