ما فائدة هذا التعبير العادي: (?:[a-zA-Z0-9!#$%\\&'\*+/=?\\^\_`{|}~-]+(?:\\ .[a-zA-Z0-9!#$%\\&'\*+/=?\\^\_`{|}"
 + "~-]+)\*|\"(?:[\\x01-\\x08\\x0b\\x0c\\x0e-\\x1f\\x21\\x23-\\x5b\\x5d- \\"
 + "x7f]|\\\\[\\x01-\\x09\\x0b\\x0c\\x0e-\\x7f])\*\")@(?:(?:[a-z0-9 ](؟:[أ-"
 + "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])+)\\])
{"source": "LDJnr/Capybara#Dove", "kind": "unknown", "evolved_from": null}