数组排序并去重

        function fn(arr){
            for(var i = 0; i < arr.length-1; i++){
                for(var j = 0; j < arr.length-1-i; j++){
                    if(arr[j]<arr[j+1]){
                    var temp = arr[j];
                    arr[j] = arr[j+1];
                        arr[j+1] = temp;
                    }
                }
            }
            for(var k = 0; k < arr.length; k++){
                var c = arr[k];
                for(var l = k+1; l < arr.length; l++){
                    if(arr[l] == c){
                        arr.splice(l, 1);
                        l--;
                    }
                }
            }
        return arr
        }
var arr = [1, 2, 5, 6, 8, 9, 10, 6, 5, 7, 4, 3, 5]
console.log(fn(arr))