strings包的TrimRight/Left和TrimSuffix/Pefix

1、TrimRight/Left：

函数定义：
// TrimRight returns a slice of the string s, with all trailing
// Unicode code points contained in cutset removed.
//从右往左删除s中所有包含在cutset里面的字符；直到遇到不包含在cutset里面的字符为止
func TrimRight(s string, cutset string) string


// TrimLeft returns a slice of the string s with all leading
// Unicode code points contained in cutset removed.
//从左往右删除s中所有包含在cutset里面的字符；直到遇到不包含在cutset里面的字符为止
func TrimLeft(s string, cutset string) string

fmt.Println(strings.TrimRight("abcbab", "ab"))

输出：abc

fmt.Println(strings.TrimLeft("abcbab", "ab"))

输出：cbab

2、TrimSuffix/Pefix：

函数定义： // TrimSuffix returns s without the provided trailing suffix string. // If s doesn't end with suffix, s is returned unchanged. // 删除后缀 func TrimSuffix(s, suffix []byte) []byte