A Tour of Go: Exercise: Maps Implement WordCount. It should return a map of the counts of each “word” in the string s. The wc.Test function runs a test suite against the provided function and prints success or failure. You might find strings.Fields helpful.

exercise-maps.go

package main

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

func WordCount(s string) map[string]int {
	outputMap := make(map[string]int)
	split_string := strings.Split(s, " ")
	for _, item := range split_string {
		_, ok := outputMap[item] // check if key exists in outputMap
		if ok {
			outputMap[item] += 1
		} else {
			outputMap[item] = 1
		}
	}
	fmt.Println(outputMap)
	return outputMap
}

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