leetcode 47

啧啧啧，我排名98%

nums.sort(function (a,b) { return a>b});arrl=[];arr=[];function search(nums){    if(nums.length==0){        arrl.push(arr.slice(0));        return ;    }    for(var i=0;i<nums.length;i++){        if(i>0){            if(nums[i]==nums[i-1]){                continue;            }        }        arr.push(nums[i]);        n1=nums.slice(0);        n1.splice(i,1);        search(n1);        arr.pop();    }}search(nums);return arrl;