go语言MAP用法

先做一个练习题：http://tour.golangtc.com/moretypes/18

练习：map

实现 `WordCount`。它应当返回一个含有 s 中每个 “词” 个数的 map。函数 wc.Test 针对这个函数执行一个测试用例，并打印成功或者失败。

你会发现 strings.Fields 很有帮助。

我的代码：

package main

import (
    "code.google.com/p/go-tour/wc"
    "strings"
    
)
func WordCount(s string) map[string]int {
   
  str := strings.Fields(s)//把字符串分成单词数组
  m := make(map[string]int)
  for i:=0;i<len(str);i++{
	if m[str[i]]==0{
	  m[str[i]]=1
	}else{
	  m[str[i]]++
	}
  }
	return m
}
func main() {
	wc.Test(WordCount)
}

运行结果：

PASS
 f("I am learning Go!") = 
  map[string]int{"I":1, "am":1, "learning":1, "Go!":1}
PASS
 f("The quick brown fox jumped over the lazy dog.") = 
  map[string]int{"quick":1, "fox":1, "jumped":1, "the":1, "The":1, "over":1, "lazy":1, "dog.":1, "brown":1}
PASS
 f("I ate a donut. Then I ate another donut.") = 
  map[string]int{"ate":2, "a":1, "donut.":2, "Then":1, "another":1, "I":2}
PASS
 f("A man a plan a canal panama.") = 
  map[string]int{"A":1, "man":1, "a":2, "plan":1, "canal":1, "panama.":1}