http://tour.golang.org/#43

gotour#43.go

package main

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

func WordCount(s string) map[string]int {
    a := strings.Split(s, " ")
    res :=make(map[string]int)

    for i:=0 ; i<len(a) ; i++ {
        _,ok := res[a[i]]
        if !ok {
            res[a[i]] = 1
        } else {
            res[a[i]]++
        }
    }
    return res
}

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