package main
import (
"regexp"
"fmt"
)
func main() {
var re = regexp.MustCompile(`(?mi)^(?=[a-z0-9-]{1,52}$)[a-z0-9]+(?:-[a-z0-9]+){0,2}$`)
var str = `abc-123
abc-123-abc
-abc-123
abc-123-
abc-123-abc-123
abc-12#-abc
`
for i, match := range re.FindAllString(str, -1) {
fmt.Println(match, "found at index", i)
}
}
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for Golang, please visit: https://golang.org/pkg/regexp/