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#112 is VERY bad. If you ever have to validate an email address, you might want to speed a few minutes and find a regex that does it right. It is a complex problem that does deserve some time. Do NOT roll your own solution just because you [think you] can.
In this case, enforcing the dot in the domain part is a bad idea not only because it violates the standard (that would be RFC 822) because there are legitimate use cases. for example:
* special domains (like "localhost" for example (there *are* others). Administrative mail on linux gets delivered to root@localhost by default.)
* intranet-only applications where clients have a dns search domain
I know of one company that has two dozen (no kidding) different functions their flagship product that are supposed to validate email addresses. Most of them are non-trivial and definitely took some time to implement. Not one of them is correct.
(why do I need your e-mail?)
It would be nice if you left your e-mail address. Sometimes I want to send a private message, or just thank for the great comment. Having your e-mail really helps.
I will never ever spam you.
(Your twitter name, if you have one. (I'm @pkrumins, btw.))
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Peteris Krumins' blog about programming, hacking, software reuse, software ideas, computer security, browserling, google and technology.
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I love to read science books. They make my day and I get ideas for awesome blog posts, such as Busy Beaver, On Functors, Recursive Regular Expressions and many others.
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