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go map init

http://play.golang.org/p/HvPN5zzxGs


http://play.golang.org/p/Wr3BQgip6z

func WordCount(s string) map[string]int {
	m := make(map[string]int)
	for _, v := range strings.Fields(s) {
		m[v] = m[v] + 1
	}
	return m
}