(Go)07.strings与strconv的示例

 package main
 import (
   "strconv"
   "fmt"
   "strings"
 )
 func main() {

     str := "Hello World test!"
     result := strings.Replace(str, "World", "golang", )
     fmt.Println(result)

     count := strings.Count(str, "o")
     fmt.Println(count)

     result = strings.Repeat(str, )
     fmt.Println(result)    

     result = strings.ToUpper(str)
     fmt.Println(result)    

     result = strings.ToLower(str)
     fmt.Println(result)    

     result = strings.TrimSpace(str)
     fmt.Println("trimSpace:" ,result)

     result = strings.Trim(str, " \n\r")
     fmt.Println("trim:" ,result)

     result =  strings.TrimLeft(str, " \n\r")
     fmt.Println("trimleft:" ,result)

     result =  strings.TrimRight(str, " \n\r")
     fmt.Println("trimright:" ,result)

     splitResult := strings.Fields(str)
     for i := ; i < len(splitResult); i++ {
         fmt.Println(splitResult[i])
     }
     str2 := strings.Join(splitResult, "l")
     fmt.Println("join:", str2)

     str2 = strconv.Itoa()
     fmt.Println("itoa:", str2)

     number, err := strconv.Atoi(str2)
     if err != nil {
         fmt.Println("can not convert to int,", err)
         return
     }
     fmt.Println("number:", number)
 }

输出结果：