string 如何在Golang中删除字符串的最后一个字符？
声明：本页面是StackOverFlow热门问题的中英对照翻译，遵循CC BY-SA 4.0协议，如果您需要使用它，必须同样遵循CC BY-SA许可，注明原文地址和作者信息，同时你必须将它归于原作者（不是我）：StackOverFlow
原文地址: http://stackoverflow.com/questions/8689425/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
How to remove the last character of a string in Golang?
提问by Micheal Perr
I want to remove the very last character of a string, but before I do so I want to check if the last character is a "+". How can this be done?
我想删除字符串的最后一个字符，但在此之前我想检查最后一个字符是否为“+”。如何才能做到这一点？
回答by Karthik G R
Builtin function is available now. http://golang.org/pkg/strings/#TrimSuffix
回答by peterSO
Here are several ways to remove trailing plus sign(s).
以下是删除尾随加号的几种方法。
package main
import (
"fmt"
"strings"
)
func TrimSuffix(s, suffix string) string {
if strings.HasSuffix(s, suffix) {
s = s[:len(s)-len(suffix)]
}
return s
}
func main() {
s := "a string ++"
fmt.Println("s: ", s)
// Trim one trailing '+'.
s1 := s
if last := len(s1) - 1; last >= 0 && s1[last] == '+' {
s1 = s1[:last]
}
fmt.Println("s1:", s1)
// Trim all trailing '+'.
s2 := s
s2 = strings.TrimRight(s2, "+")
fmt.Println("s2:", s2)
// Trim suffix "+".
s3 := s
s3 = TrimSuffix(s3, "+")
fmt.Println("s3:", s3)
}
Output:
输出：
s: a string ++
s1: a string +
s2: a string
s3: a string +
回答by jimt
No builtin way. But it's trivial to do manually.
没有内置方式。但是手动操作很简单。
s := "mystring+"
sz := len(s)
if sz > 0 && s[sz-1] == '+' {
s = s[:sz-1]
}
回答by 030
Based on the answer of @KarthikGR the following example was added:
根据@KarthikGR 的回答，添加了以下示例：
https://play.golang.org/p/ekDeT02ZXoq
https://play.golang.org/p/ekDeT02ZXoq
package main
import (
"fmt"
"strings"
)
func main() {
fmt.Println(strings.TrimSuffix("Foo++", "+"))
}
returns:
返回：
Foo+
