Question

So I dumped all the emails from a DB into a txt file and I`m looking to sort them by email provider, basically anything that comes after the @ sign.

I know I can use regex to validate each email.
However how do I indicate that I want to sort them by anything that comes after the @ sign?

Answer 1

I know I can use regex to validate each email.

Careful! The range of valid e-mail addresses is much wider than most people think. The only correct regexes for e-mail validation are on the order of a page in length. If you must use a regex, just check for the @ and one ..

However how do I indicate that I want to sort them by anything that comes after the @ sign

email_addresses.sort_by {|addr| addr.split('@').last }