数组去重

var a=[1,3,4,5,6,1,3,9,6];
        //代码是去重后的
        function arrfn(data){
            let newObj={};
            for(let i=0;i<data.length;i++){
                newObj[data[i]]=data[i];
            }
            return newObj;
        }
        //找到重复的代码
        function earrfn(data){
            let newArr=[];
            let bbb=[];
            for(let i=0;i<data.length;i++){
                if(bbb.includes(data[i])){
                    newArr.push(data[i]);
                    continue;
                }
                bbb.push(data[i]);
            }
            return newArr;
        }
        console.log(earrfn(a));