re = /(?:[a-z0-9+!#$%&'*+\/=?^_`{|}~-]+(?:\.[a-z0-9!#$%&'*+\/=?^_`{|}~-]+)*|"(?:[\x01-\x08\x0b\x0c\x0e-\x1f\x21\x23-\x5b\x5d-\x7f]|\\[\x01-\x09\x0b\x0c\x0e-\x7f])*")@(?:(?:[a-z0-9](?:[a-z0-9-]*[a-z0-9])?\.)+[a-z0-9](?:[a-z0-9-]*[a-z0-9])?|\[(?:(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.){3}(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?|[a-z0-9-]*[a-z0-9]:(?:[\x01-\x08\x0b\x0c\x0e-\x1f\x21-\x5a\x53-\x7f]|\\[\x01-\x09\x0b\x0c\x0e-\x7f])+)\])/i
str = '[a-zA-Z0-9-_.+]+@[a-zA-Z0-9-_.]+
ekoprasetyo.crb@outlook.com
db.maulana@gmail.com.
dee.wien@yahoo.com. .
"deninainggolan@yahoo.co.id"
Fajar.rohita@hotmail.com klaas knot (firmansya1404@gmail.aero);
dydmm, sss <fransisca+jw@gmail.com>, donny_tri_wardono@yahoo.co.id thank a
"Helpdesk | Energiem**ine" <helpdesk@ene---ine.nl>
invalid: John..Doe@example.com
valid: John.Doe@example.com
Valid addresses from https://en.wikipedia.org/wiki/Email_address
simple@example.com
very.common@example.com
FirstName.LastName@EasierReading.org
x@example.com
long.email-address-with-hyphens@and.subdomains.example.com
user.name+tag+sorting@example.com
name/surname@example.com
admin@example
example@s.example
" "@example.org
"john..doe"@example.org
mailhost!username@example.org
"very.(),:;<>[]\\".VERY.\\"very@\\\\ \\"very\\".unusual"@strange.example.com
user%example.com@example.org
user-@example.org
postmaster@[123.123.123.123]
postmaster@[IPv6:2001:0db8:85a3:0000:0000:8a2e:0370:7334]
_test@[IPv6:2001:0db8:85a3:0000:0000:8a2e:0370:7334]'
# Print the match result
str.scan(re) do |match|
puts match.to_s
end
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 Ruby, please visit: http://ruby-doc.org/core-2.2.0/Regexp.html