package main import ( "golang.org/x/tour/wc" "strings" ) func WordCount(s string) map[string]int { stringAr := strings.Fields(s) result := make(map[string]int) for i:=range stringAr { v :=result[stringAr[i]] result[stringAr[i]] = v+1 } return result } func main() { wc.Test(WordCount) }