Golang Tour - Map Word Count Solution

package main

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

func WordCount(s string) map[string]int {
	var words = strings.Split(s, " ")
	var mapper map[string]int
	mapper = make(map[string]int)
	for _, word := range words {
		if _, ok := mapper[word]; ok {
			mapper[word]++
		} else {
			mapper[word] = 1
		}
	}
	return mapper
}

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