count words in go

word_count.go

package main

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

func WordCount(s string) map[string]int {
	result := make(map[string]int)
	present := false
	for _, word := range strings.Fields(s) {
		if _, present = result[word]; present {
			result[word] += 1
		} else {
			result[word] = 1
		}
	}
	return result
}

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