2 Sum
Find two numbers from the array that sum to the given target.
Example 1:
Input: nums = [2,7,11,15], target = 9
Output: [0,1]
Explanation: nums[0] + nums[1] == 9, so we return [0, 1]Example 2:
Input: nums = [3,2,4], target = 6
Output: [1,2]Example 3:
Input: nums = [3,3], target = 6
Output: [0,1]Solution:
var twoSum = function (nums, target) {
var map = new Map()
for (var i = 0; i < nums.length; i++) {
if (map.has(target - nums[i])) {
return [map.get(target - nums[i]), i]
} else {
map.set(nums[i], i)
}
}
}