"A Tour of Go"

maps.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.
*/

package main

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

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

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