You're viewing a comment by you and its responses.
|
For every complex problem there is an answer that is clear, simple, and wrong. |
About the site:
Twitter
Facebook
more
LinkedIn
Google+
GitHubSubscribe to my posts:
Subscribe through an RSS feed:
Subscribe through email:
My Books
Top Ten Articles:
- Turn any Linux computer into SOCKS5 proxy in one command
- Top Ten One-Liners from CommandLineFu Explained
- My Job Interview at Google
- Sed One-Liners Explained, Part I: File Spacing, Numbering and Text Conversion and Substitution
- MIT's Introduction to Algorithms, Lectures 1 and 2: Analysis of Algorithms
- A HTTP Proxy Server in 20 Lines of node.js Code
- Awk One-Liners Explained, Part I: File Spacing, Numbering and Calculations
- Low Level Bit Hacks You Absolutely Must Know
- The Definitive Guide to Bash Command Line History
- Working Productively in Bash's Vi Command Line Editing Mode (with Cheat Sheet)
Top Ten Downloads:
- perl1line.txt (382,110)
- bash redirections cheat sheet (.pdf) (269,295)
- bash history cheat sheet (.pdf) (232,900)
- awk cheat sheet (.pdf) (231,697)
- sed stream editor cheat sheet (.pdf) (174,073)
- screen cheat sheet (.pdf) (172,053)
- bash vi editing mode cheat sheet (.pdf) (171,745)
- perl's pack/unpack and printf cheat sheet (.pdf) (155,037)
- awk cheat sheet (.txt) (148,121)
- perl's special variable cheat sheet (.pdf) (139,471)
Recent Articles:
- Winamp, it really whips the llama's ass! (comic)
- Tenth site in online tools network: onlineHEXtools.com
- Ninth site in online tools network: onlinePNGtools.com
- Browserling is now a top 40k website in the world
- Knuth vs McIlroy (Epic Computer Science Battles)
- 1000 days of commits
- Browserling has helped Cameroonians restore Internet freedom
- Why does Browserling's comic have 10 different formats?
- Eighth site in online tools network: onlineBINARYtools.com
- How much traffic do domain typos get?
Article Categories:
- Awk Programming (8)
- Browserling (112)
- Cheat Sheets (13)
- Computer Science (9)
- Hacker's Approach (8)
- Howto (12)
- Ideas for Later (1)
- Interviews (8)
- Introduction to Algorithms (15)
- Linear Algebra (6)
- Mathematics (1)
- Misc (33)
- Musical Geek Friday (17)
- My Favorite Books (7)
- Node.js Modules (15)
- Perl Programming (16)
- Programming (38)
- Projects (13)
- Security (4)
- The New Catonmat (1)
- Tools (1)
- Unix Shell (31)
- Video Lectures (18)
- Visual Math Friday (1)
Article Archive:
- April, 2018 (1)
- March, 2018 (2)
- February, 2018 (3)
- January, 2018 (6)
- December, 2017 (5)
- November, 2017 (8)
- October, 2017 (5)
- September, 2017 (1)
- August, 2017 (4)
- July, 2017 (3)
- June, 2017 (1)
- May, 2017 (1)
- April, 2017 (4)
- March, 2017 (2)
- February, 2017 (4)
- January, 2017 (1)
- December, 2016 (5)
- November, 2016 (2)
- October, 2016 (2)
- September, 2016 (2)
- August, 2016 (3)
- July, 2016 (3)
- June, 2016 (1)
- May, 2016 (1)
- April, 2016 (1)
- March, 2016 (5)
- February, 2016 (1)
- January, 2016 (4)
- December, 2015 (4)
- November, 2015 (4)
- October, 2015 (7)
- September, 2015 (9)
- August, 2015 (1)
- July, 2015 (2)
- June, 2015 (2)
- May, 2015 (1)
- April, 2015 (6)
- March, 2015 (1)
- February, 2015 (1)
- January, 2015 (1)
- December, 2014 (1)
- November, 2014 (1)
- October, 2014 (2)
- September, 2014 (1)
- August, 2014 (1)
- July, 2014 (1)
- June, 2014 (1)
- May, 2014 (1)
- April, 2014 (1)
- March, 2014 (3)
- February, 2014 (3)
- January, 2014 (5)
- December, 2013 (1)
- November, 2013 (1)
- October, 2013 (1)
- September, 2013 (1)
- August, 2013 (1)
- July, 2013 (1)
- June, 2013 (1)
- May, 2013 (1)
- April, 2013 (1)
- March, 2013 (1)
- February, 2013 (2)
- January, 2013 (4)
- December, 2012 (1)
- November, 2012 (3)
- October, 2012 (4)
- September, 2012 (3)
- August, 2012 (2)
- July, 2012 (2)
- June, 2012 (1)
- May, 2012 (4)
- April, 2012 (3)
- March, 2012 (2)
- February, 2012 (1)
- January, 2012 (4)
- December, 2011 (15)
- November, 2011 (3)
- October, 2011 (2)
- September, 2011 (2)
- August, 2011 (3)
- July, 2011 (1)
- June, 2011 (2)
- May, 2011 (1)
- April, 2011 (1)
- March, 2011 (2)
- February, 2011 (2)
- January, 2011 (1)
- December, 2010 (2)
- November, 2010 (1)
- October, 2010 (2)
- September, 2010 (1)
- August, 2010 (2)
- July, 2010 (2)
- June, 2010 (2)
- May, 2010 (2)
- April, 2010 (2)
- March, 2010 (5)
- February, 2010 (5)
- January, 2010 (7)
- December, 2009 (6)
- November, 2009 (6)
- October, 2009 (2)
- September, 2009 (3)
- August, 2009 (2)
- July, 2009 (4)
- June, 2009 (1)
- May, 2009 (1)
- April, 2009 (1)
- March, 2009 (2)
- February, 2009 (7)
- January, 2009 (4)
- December, 2008 (8)
- November, 2008 (7)
- October, 2008 (5)
- September, 2008 (5)
- August, 2008 (9)
- July, 2008 (14)
- June, 2008 (4)
- May, 2008 (5)
- April, 2008 (8)
- March, 2008 (3)
- February, 2008 (1)
- January, 2008 (1)
- December, 2007 (1)
- November, 2007 (1)
- October, 2007 (3)
- September, 2007 (5)
- August, 2007 (10)
- July, 2007 (9)
#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.)
* gtlds
* 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.
Reply To This Comment