Comment by zby

These regexps might be useful as first approximations - but they are not as robust as the article suggest they are (for example numbers can contain decimal point or decimal comma depending on your language, parsing email addresses is a subject for an essay and I've heard the correct Perl regexp for that takes about a page of text). This article is harmful - because those who can benefit from this kind of basic regexp examples are also those who will not understand the limitations.