英文:
How to Trim "[" char from a string in Golang
问题
可能是一个愚蠢的问题，但我卡在这上面有一段时间了...
无法从字符串中删除"["字符，我尝试了以下几种方法，但都没有成功：
package main
import (
"fmt"
"strings"
)
func main() {
s := "this[things]I would like to remove"
t := strings.Trim(s, "[")
fmt.Printf("%s\n", t)
}
输出结果为：this[things]I would like to remove
我还尝试了以下所有方法，但都没有成功：
s := "this [ things]I would like to remove"
t := strings.Trim(s, " [ ")
// 输出结果为：this [ things]I would like to remove
s := "this [ things]I would like to remove"
t := strings.Trim(s, "[")
// 输出结果为：this [ things]I would like to remove
都没有起作用。我在这里漏掉了什么？
英文:
Probably a silly thing but got stuck on it for a bit...
Can't trim a "[" char from a string, things I tried with outputs:
package main
import (
"fmt"
"strings"
)
func main() {
s := "this[things]I would like to remove"
t := strings.Trim(s, "[")
fmt.Printf("%s\n", t)
}
// output: this[things]I would like to remove
Also tried all of those, with no success:
s := "this [ things]I would like to remove"
t := strings.Trim(s, " [ ")
// output: this [ things]I would like to remove
s := "this [ things]I would like to remove"
t := strings.Trim(s, "[")
// output: this [ things]I would like to remove
None worked. What am I missing here?
答案1
得分: 90
你错过了阅读文档。strings.Trim()：
> func Trim(s string, cutset string) string
> Trim 函数返回字符串 s 的一个切片，其中移除了 cutset 中包含的所有前导和尾部的 Unicode 代码点。
你输入的 [ 字符既不在前导位置，也不在尾部位置，而是在中间位置，所以 strings.Trim() 函数不会将其移除，这是其正常行为。
你可以尝试使用 strings.Replace() 替代：
s := "this[things]I would like to remove"
t := strings.Replace(s, "[", "", -1)
fmt.Printf("%s\n", t)
输出结果（在 Go Playground 上尝试）：
thisthings]I would like to remove
此外，Go 1.12 中还添加了 strings.ReplaceAll() 函数（基本上是 Replace(s, old, new, -1) 的简写形式）。
英文:
You are missing reading the doc. strings.Trim():
> func Trim(s string, cutset string) string
> Trim returns a slice of the string s with all leading and trailing Unicode code points contained in cutset removed.
The [ character in your input is not in a leading nor in a trailing position, it is in the middle, so strings.Trim() – being well behavior – will not remove it.
Try strings.Replace() instead:
s := "this[things]I would like to remove"
t := strings.Replace(s, "[", "", -1)
fmt.Printf("%s\n", t)
Output (try it on the Go Playground):
thisthings]I would like to remove
There is also a strings.ReplaceAll() added in Go 1.12 (which is basically a "shorthand" for Replace(s, old, new, -1)).
答案2
得分: -4
试试这个
package main
import (
"fmt"
"strings"
)
func main() {
s := "this[things]I would like to remove"
t := strings.Index(s, "[")
fmt.Printf("%d\n", t)
fmt.Printf("%s\n", s[0:t])
}
英文:
Try this
package main
import (
"fmt"
"strings"
)
func main() {
s := "this[things]I would like to remove"
t := strings.Index(s, "[")
fmt.Printf("%d\n", t)
fmt.Printf("%s\n", s[0:t])
}
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