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 (
"golang.org/x/tour/wc" "strings")
func WordCount(s string) map[string]int {
res := make(map[string]int)
arr := strings.Split(s, " ")
for _, v := range arr {
if _, ok := res[v]; !ok {
res[v] = 1 } else {
res[v] ++
}
}
return res}
func main() {
wc.Test(WordCount)
}
运行输出:
PASS
f("I am learning Go!") =
map[string]int{"Go!":1, "I":1, "am":1, "learning":1}
PASS
f("The quick brown fox jumped over the lazy dog.") =
map[string]int{"The":1, "brown":1, "dog.":1, "fox":1, "jumped":1, "lazy":1, "over":1, "quick":1, "the":1}
PASS
f("I ate a donut. Then I ate another donut.") =
map[string]int{"I":2, "Then":1, "a":1, "another":1, "ate":2, "donut.":2}
PASS
f("A man a plan a canal panama.") =
map[string]int{"A":1, "a":2, "canal":1, "man":1, "panama.":1, "plan":1}