(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", 1)
    fmt.Println(result)

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

    result = strings.Repeat(str, 3)
    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, " 

")
    fmt.Println("trim:" ,result)

    result =  strings.TrimLeft(str, " 

")
    fmt.Println("trimleft:" ,result)

    result =  strings.TrimRight(str, " 

")
    fmt.Println("trimright:" ,result)

    splitResult := strings.Fields(str)
    for i := 0; i < len(splitResult); i++ {
        fmt.Println(splitResult[i])
    }
    str2 := strings.Join(splitResult, "l")
    fmt.Println("join:", str2)

    str2 = strconv.Itoa(1000)
    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：