js数组去重

 1 var aa=[1,3,5,4,3,3,1,4]
 2 function arr(arr) {
 3 var result=[]
 4 for(var i=0; i<arr.length; i++){
 5 if(result.indexOf(arr[i])==-1){
 6 result.push(arr[i])
 7 }
 8 }
 9 console.log(result)
10 } 
11 arr(aa)

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

 1 var array = [5, 4, 3, 2, 1];
 2 var temp = 0;
 3 for (var i = 0; i < array.length; i++)
 4 {
 5 for (var j = 0; j < array.length - i; j++)
 6 {
 7 if (array[j] > array[j + 1])
 8 {
 9 temp = array[j + 1];
10 array[j + 1] = array[j];
11 array[j] = temp;
12 }
13 }
14 }
15 console.log(array);