A function for returning the mode of a slice in Golang

GolangMode.go

func getMode(testArray []int) (mode int) {
//	Create a map and populated it with each value in the slice
//	mapped to the number of times it occurs
	countMap := make(map[int]int)
	for _, value := range testArray {
		countMap[value] += 1
	}
	
//	Find the smallest item with greatest number of occurance in
//	the input slice
	max := 0
	for _, key := range testArray {
		freq := countMap[key]
		if freq > max {
			mode = key
			max = freq
		}
	}
	return
}