package main
import (
"regexp"
"fmt"
)
func main() {
var re = regexp.MustCompile(`(?m)^(?=([A-Za-z0-9]|[^\x00-\x7F])([A-Za-z0-9@._%+-]|[^\x00-\x7F]){5,253}$)([A-Za-z0-9._%+-]|[^\x00-\x7F]){1,64}@(?:(?=([A-Za-z0-9-]|[^\x00-\x7F]){1,63}\.)([A-Za-z0-9]|[^\x00-\x7F])+(?:-([A-Za-z0-9]|[^\x00-\x7F])+)*\.){1,8}([A-Za-z]|[^\x00-\x7F]){2,63}$`)
var str = `Format: minimum 2 characters @ minimum 3 characters . 2 - 63 characters
the g modifier let's us match multiple times in one string. the m modifier is useful here because it lets us treat each line as a seperate entry. Though in practice you probably dont need it for a simple one line email field
^(?=[A-Z0-9][A-Z0-9@._%+-]{5,253}+$)[A-Z0-9._%+-]{1,64}+@(?:(?=[A-Z0-9-]{1,63}+\.)[A-Z0-9]++(?:-[A-Z0-9]++)*+\.){1,8}+[A-Z]{2,63}+$
שדגכ@שדגכ
דגכ
אלפ@גכדץ.בםצ
Jim@stuff.co.uk
Jim@google.com
Henry@h.com
Joe @m.net
Joe@m.net
Joe@mo.net
Joe@sam.net
a@sam.net
mo@sam.org
12@sam.org
Jon@sam.c
Jon@sam.co
`
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/