Fast two sum - alternative way instead of two for loops

two_sum_fast.go

func twoSum(nums []int, target int) []int {
  var tempDict = make(map[int]int)
	for key, value := range nums {
	  if _, ok := tempDict[value]; ok{
		  return []int{tempDict[value], key}
		}
		tempDict[target-value] = key
	}
	return []int{}
}