英文:
Golang regex replace does nothing
问题
我想用破折号替换任何非字母数字字符序列。我写的一部分代码如下。然而它不起作用，我完全不知道为什么。有人能解释一下为什么这段代码的行为不像我期望的那样，并且正确的实现方法是什么吗？
package main
import (
"fmt"
"regexp"
"strings"
)
func main() {
reg, _ := regexp.Compile("/[^A-Za-z0-9]+/")
safe := reg.ReplaceAllString("a*-+fe5v9034,j*.AE6", "-")
safe = strings.ToLower(strings.Trim(safe, "-"))
fmt.Println(safe) // 输出：a*-+fe5v9034,j*.ae6
}
英文:
I want to replace any non-alphanumeric character sequences with a dash. A snippet of what I wrote is below. However it does not work and I'm completely clueless why. Could anyone explain me why the snippet behaves not like I expect it to and what would be the correct way to accomplish this?
package main
import (
"fmt"
"regexp"
"strings"
)
func main() {
reg, _ := regexp.Compile("/[^A-Za-z0-9]+/")
safe := reg.ReplaceAllString("a*-+fe5v9034,j*.AE6", "-")
safe = strings.ToLower(strings.Trim(safe, "-"))
fmt.Println(safe) // Output: a*-+fe5v9034,j*.ae6
}
答案1
得分: 33
The forward slashes are not matched by your string.
package main
import (
"fmt"
"log"
"regexp"
"strings"
)
func main() {
reg, err := regexp.Compile("[^A-Za-z0-9]+")
if err != nil {
log.Fatal(err)
}
safe := reg.ReplaceAllString("a*-+fe5v9034,j*.AE6", "-")
safe = strings.ToLower(strings.Trim(safe, "-"))
fmt.Println(safe) // Output: a*-+fe5v9034,j*.ae6
}
(Also here)
Output
a-fe5v9034-j-ae6
英文:
The forward slashes are not matched by your string.
package main
import (
"fmt"
"log"
"regexp"
"strings"
)
func main() {
reg, err := regexp.Compile("[^A-Za-z0-9]+")
if err != nil {
log.Fatal(err)
}
safe := reg.ReplaceAllString("a*-+fe5v9034,j*.AE6", "-")
safe = strings.ToLower(strings.Trim(safe, "-"))
fmt.Println(safe) // Output: a*-+fe5v9034,j*.ae6
}
(Also here)
Output
a-fe5v9034-j-ae6
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