js 数组去重复两种方法一看就懂

var arr=[1,1,2,2,3,5,2];
function uniqueArr(arr){
    var data=[];
    for(var i=0;i<arr.length;i++){
        if(data.indexOf(arr[i])<0){
            data.push(arr[i]);
        }
    }
    return data;
}
console.log(uniqueArr(arr));
var arr1=[1,2,2,5,5,4,5,6,3,36,52];
function uniquearr(arr){
    var data=arr.sort();
    var undata=[];
    for(var i=0;i<arr.length;i++){
        if(arr[i]!==arr[i+1]){
            undata.push(arr[i]);
        }
    }
    return undata;
}
console.log(uniquearr(arr1));