My GoTour Exercise #45 (http://tour.golang.org/#45) solution

gistfile1.go

package main

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

// Maybe strings.Fields is cheating?

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

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