leetCode刷题(找出数组里的两项相加等于定值)

最近被算法虐了一下，刷一下leetcode，找找存在感

如题：

Given an array of integers, return indices of the two numbers such that they add up to a specific target.

You may assume that each input would have exactly one solution, and you may not use the same element twice.

Example:

Given nums = [2, 7, 11, 15], target = 9,

Because nums[0] + nums[1] = 2 + 7 = 9,
return [0, 1].

/**
 * @param {number[]} nums
 * @param {number} target
 * @return {number[]}
 */
var twoSum = function(nums, target) {
    var arr=[];
    for(var i=0;i<nums.length;i++){
        dowheel(i,nums);
    }
    function dowheel(i,nums){
        for(var j=i+1;j<nums.length;j++){
            if(nums[i]+nums[j]==target){
                arr=[i,j];
            }
        }
    }
    return arr;
};