5做法
var array=[1,3,4,5,2,3,4,5,5,5];
var ob={};
var result=[];
array.forEach(function (a) {
    var key=(typeof a)+a;
    console.log(key)
    if(!ob[key]){
        ob[key]=true;
        result.push(a)
    }
    console.log(result)
})
6做法
let array = [1, 1, 1, 1, 2, 3, 4, 4, 5, 3];

let newarray = Array.from(new Set([1, 1, 1, 2, 3, 2, 4]));
console.log(newarray)