Go语言字符串操作

示例：

package main
import(
    "fmt"
    "strings"
    "unicode"
)
func main(){
    TestTrim()
    TestTrimFunc()
    TestTrimLeft()
    TestTrimLeftFunc()
    TestTrimRight()
    TestTrimRightFunc()
    TestTrimSpace()
    TestTrimPrefix()
    TestTrimSuffix()
    TestContains()
}
//将字符串s首尾包含在cutset中的任一字符去掉返回
func TestTrim(){
    fmt.Println(strings.Trim("  steven wang  ", " "))
}
//将字符串s首尾满足函数 f(r)==true 的字符去掉返回
func TestTrimFunc(){
    f := func(c rune)bool {
        return !unicode.IsLetter(c) && !unicode.IsNumber(c)
    }
    fmt.Println(strings.TrimFunc("! @#￥ %steven wang%$#@", f))
}
//将字符串s左边包含在cutset中的任一字符去掉返回
func TestTrimLeft(){
    fmt.Println(strings.TrimLeft("   steven wang   ", " "))
}
//将字符串s左边满足函数f(r)==true的字符去掉返回
func TestTrimLeftFunc(){
    f := func(c rune)bool{
        return !unicode.IsLetter(c) && !unicode.IsNumber(c)
    }
    fmt.Println(strings.TrimLeftFunc("！@#￥%steven wang%￥#@", f))
}
//将字符串s右边包含在cutset中的任一字符去掉返回
func TestTrimRight(){
    fmt.Println(strings.TrimRight("    steven wang    ", " "))
}
//将字符串s右边满足函数f(r)==true的字符去掉返回
func TestTrimRightFunc(){
    f := func(c rune)bool{
        return !unicode.IsLetter(c) && !unicode.IsNumber(c)
    }
    fmt.Println(strings.TrimRightFunc("！@#￥%steven wang%￥#@", f))
}
//将字符串s首尾空白去掉返回
func TestTrimSpace(){
    fmt.Println(strings.TrimSpace(" \t\n a lone gopher \n\t\r\n"))
}
//将字符串s中前缀字符串prefix去掉返回
func TestTrimPrefix(){
    var s = "Goodbye, world！"
    s = strings.TrimPrefix(s, "Goodbye")//, world！
    fmt.Println(s)
}
//将字符串s中后缀字符串suffix去掉返回
func TestTrimSuffix(){
    var s = "Hello, goodbye, etc！"
    s = strings.TrimSuffix(s, "goodbye, etc！")//Hello,
    fmt.Println(s)
}
//判断字符串是否包含指定字符
func TestContains(){
    var s = "Hello, goodbye, etc！"
    s = strings.Contains(s, "goodbye")//true,
    fmt.Println(s)
}

运行结果如下

steven wang
steven wang
steven wang  
steven wang%￥#@
    steven wang
！@#￥%steven wang
a lone gopher
, world！
Hello, 
true