Chris on Computers - All Comments

email address format

email address format — Sun, 25 May 2008 22:10:55 GMT

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re: How to get listed on the great chinese firewall?

Christoph Rüegg — Thu, 08 Mar 2007 09:13:38 GMT

This bloke is still trying to connect every few seconds, even though he didn't receive any response for his continuing TCP SYN packets for more than 10 hours ... badly written indeed.

re: Kakuro Combinations

Jen — Thu, 09 Nov 2006 15:49:07 GMT

Bless you! The Kevin Pluck table is neither downloadable nor neatly printable in its web form. Thanks!

re: Email Address Format Myths

Christoph Rüegg — Thu, 05 Oct 2006 20:09:28 GMT

Just as a reference: I built the following regular expression (regex) directly from the two RFCs 2821 & 2822, but I dropped support for the following special cases:

General Address Literal (domain-part: generalization of the IPv6 literal); However, IPv4 and IPv6 literals are supported (although the IPv6 format is not checked for valid addresses)!
I don't check the total lengths
Quoted-Strings in the local part (they're not recommended anyway)

Some RFC-valid email addresses:

abc@def.ghi
*abc.def*@[101.2.1.2]
a7!#+/=??_'asdb@spam.com

RFC-invalid email addresses:

.abc@def.com
abc.@def.com
abc(ade)@def.com
abc@[123.123]

And this is the regex (should be all in one line):

[-a-zA-Z0-9!#$%&'*+/=?^_'{|}~]+
(?:\.[-a-zA-Z0-9!#$%&'*+/=?^_'{|}~]+)*
@([a-zA-Z0-9](?:[-a-zA-Z0-9]*[a-zA-Z0-9])?
(?:\.[a-zA-Z0-9](?:[-a-zA-Z0-9]*[a-zA-Z0-9])?)+
|\[(?:\d{1,3}(?:\.\d{1,3}){3}|IPv6:[0-9A-Fa-f:]{4,39})\])

re: Email Address Format Myths

Christoph Rüegg — Fri, 29 Sep 2006 09:25:20 GMT

Thanks, looks like I'm not alone with these problems then :) Yes, it is indeed not allowed to have a dot right before the @ sign (neither as the first character), according to the mentioned RFCs, as "Atom = 1*atext" means "one or more atext's"

re: Strange PowerShell Bug?

Christoph Rüegg — Wed, 27 Sep 2006 22:47:52 GMT

UPDATE: This bug is fixed in the newer RC2 version. Go get the update at: http://support.microsoft.com/kb/925228 More Details: http://blogs.msdn.com/powershell/archive/2006/09/26/Windows_PowerShell_RC2_Now_Available.aspx

re: Agile Hardware Design?

MovGP0 — Wed, 27 Sep 2006 22:36:19 GMT

To be precise, I've neever seen a easy-to-use software-tool for electronic engineers. The software in this area seems to ignore all the UserInterface Guidelines and Best-Development-Practices. That's a really bad sign, also because Unit-Testing was invented by the hardware-engineer community. and not by the software-developer community. I sometimes think the bad software quality in this area is because hardware-engineers are developing them.

re: Email Address Format Myths

MovGP0 — Wed, 27 Sep 2006 22:24:38 GMT

As Internet-Technican I see such problems all day. It seems that most Mail-Application Programmers don't read RFCs... Even when you restrict your mail-adress to letters, digits and a dot or underscore, you can run into troubles too when having the dot right before the @-sign... ys, MovGP0

re: Kakuro Combinations

Christoph Rüegg — Sat, 16 Sep 2006 15:06:18 GMT

I've found another nice kakuro combinations table on the web, you might want to have a look at it, too: http://www.kevinpluck.net/kakuro/KakuroCombinations.html

Agile Hardware Design?

Chris on Computers — Fri, 25 Aug 2006 21:00:04 GMT

Looking back at my first semester thesis at ETH , where I designed a full-custom ASIC , I realize something

re: My first ASIC

Christoph Rüegg — Wed, 23 Aug 2006 19:58:53 GMT

btw, the testing went well: all tests succeeded and the timing behavior was as expected, even slightly better so we could overclock it to about 182 MHz at standard conditions (probably even more if we wouldn't test the async reset)