package main
import (
"regexp"
"fmt"
)
func main() {
var re = regexp.MustCompile(`[a-zA-Z0-9](-?[a-zA-Z0-9])*(\.[a-zA-Z0-9](-?[a-zA-Z0-9])*)+`)
var str = `my-domain.com or sub.my-domain.com
my--domain.com or my-domain.com-net or my-domain-.com or etc must return false.`
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/