An answer of the exercise: Maps on a tour of Go

answer_word_count.go

package main

import (
	"code.google.com/p/go-tour/wc"
	"strings"
)

func WordCount(s string) map[string]int {
	m := make(map[string]int)
	a := strings.Fields(s)
	for _, v := range a {
		m[v]++
	}
	return m
}

func main() {
	wc.Test(WordCount)
}