题目：
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.
代码：
import (
"strings"
"golang.org/x/tour/wc"
)
func WordCount(s string) map[string]int {
m := make(map[string]int)
//_s := make([]string, 0)
//_s = strings.Split(s, " ")
_s := strings.Fields(s)
for _, value := range _s {
v, ok := m[value]
if ok {
v += 1
} else {
v = 1
}
m[value] = v
}
return m
}
func main() {
wc.Test(WordCount)
}
结果：
PASS
f("I am learning Go!") =
map[string]int{"am":1, "learning":1, "Go!":1, "I":1}
PASS
f("The quick brown fox jumped over the lazy dog.") =
map[string]int{"dog.":1, "jumped":1, "over":1, "lazy":1, "fox":1, "the":1, "The":1, "quick":1, "brown":1}
PASS
f("I ate a donut. Then I ate another donut.") =
map[string]int{"I":2, "ate":2, "a":1, "donut.":2, "Then":1, "another":1}
PASS
f("A man a plan a canal panama.") =
map[string]int{"man":1, "a":2, "plan":1, "canal":1, "panama.":1, "A":1}
Program exited.
原文：http://www.cnblogs.com/chpx/p/5522050.html