go tour --Exercise: Maps

package main

import (
	"golang.org/x/tour/wc"
	"strings"
)

func WordCount(s string) map[string]int {
	countMap := make(map[string]int)
	for _, k := range strings.Fields(s) {
		_, ok := countMap[k]
		if ok {
			countMap[k] +=1
		}else{
			countMap[k] = 1
		}
	} 
	return countMap
}

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