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• PCRE

• Validating Email Revisited

  First off let me say I'm a bit over my head here. Not regex part but host the language of the regex engine. Many moons ago I posted a blog article stating why you could not write a regex that validated an e-mail address 100% . Well this is still true, Read More... Posted Sunday, September 28, 2008 12:20 AM by mash | 0 Comments Filed under: Email, PCRE

• Update to CSS Minification

  This is a C# 2.0 enhancement of a C# port of YUI Compressor 's CSS minification code I got a little carried away with ideas for this, they were all regex based which really is what motivated me to work on it. However after I thought I was done I learned Read More... Posted Sunday, April 27, 2008 5:06 PM by mash | 1 Comments

• Follow up to Additional CSS minifying regex patterns

  OK, there regexes were discussed in the previous post this is mostly just their application. This is a C# 2.0 enhancement of a C# port of YUI Compressor 's CSS minification code Since I was doing this is C# I took full advantage of it's regex Read More... Posted Friday, April 18, 2008 3:04 PM by mash | 0 Comments

• Additional CSS minifying regex patterns

  NOTE: All the regex referenced on this page written by me are using IgnoreCase = true I was looking at the regexes used in the YUI Compressor to minify CSS and came up with a couple of more that I think could help the process. The code and port I was Read More... Posted Thursday, March 27, 2008 3:55 PM by mash | 2 Comments

• A touch of Character Class

  The square brackets character class is one of the more misunderstood of the basic regex features. This feature is supported in virtually all regex implementations. In fact off the top of my head I don't know an implementation that doesn't support Read More... Posted Thursday, January 31, 2008 10:49 AM by mash | 0 Comments

• Remember where you come from

  One thing I've noticed among rookie regex users is that they focus way too much on what they are trying to match and not on where they are trying to match it from. There is a tenancy to drastically under estimate the importance of their source data, Read More... Posted Monday, October 01, 2007 1:42 AM by mash | 0 Comments

• Are you ready for regex?

  Who should be using regular expressions? This has been on my mind for a while, there are some people shouldn't be using regular expressions. People who don't know what regular expressions are for. Now you can use regexes in a variety of ways, Read More... Posted Friday, June 01, 2007 12:02 PM by mash | 3 Comments

• You've got your sub-matches in my matches

  Hello boys and girls. Wow it's been a while since I've done this. I want to touch on a very useful but often overlooked feature of regex, grouping. While I haven't been blogging I have been active on a message board here or there. A question Read More... Posted Friday, June 01, 2007 11:47 AM by mash | 0 Comments

• Named Groups to the Rescue

  I was asked to modify some text that had been built incorrectly. Basically insert some text at a certain point. First I use a regex to find the text, then insert the new value within that match. Now since the inserted value goes inside the matched text Read More... Posted Wednesday, September 28, 2005 3:06 PM by mash | 0 Comments

• Making your regex code ready.

  There are times when regular expression you’ve written or someone written for you needs a little tweaking before you add it to your code and the tweaking is required because the syntax of the language conflicts with your regex. For example when part of Read More... Posted Wednesday, May 18, 2005 11:44 AM by mash | 0 Comments

• Word Break.

  The list-detail design is very commonly used with web pages, where you have a list of links that lead to more detailed information of each entry. Sometimes the text of the list is simply a snippet of a much longer string of text in the detail. A common Read More... Posted Wednesday, February 09, 2005 1:17 PM by mash | 1 Comments

• Making Dynamic XHTML pages valid with a Regex

  I have a website that I use primarily to expand and sharpen my web development skills. The latest effort in that regard had been writing valid markup. Although there is some usable function to this site I use mainly for practice. Consequently I don’t Read More... Posted Wednesday, January 26, 2005 4:47 PM by mash | 2 Comments

• Higher plane solution

  I’ve come up with a workaround to Unicode plane bug I talk about earlier Originally I was trying to identify Unicode values outside of the ASCII range, code point higher than 127, for a replace. However the problem was characters in any other plane Read More... Posted Monday, November 08, 2004 12:45 PM by mash | 0 Comments

• Flavor of the month

  It seem most regex engines based their implementation on what had been done in the PERL version, with some implementing a little more, others a little less. This is what generally keeps regexes from being portable across different implementations. This Read More... Posted Tuesday, October 05, 2004 3:58 PM by mash | 1 Comments

• JScript Bug

  I saw a comment on the Regexlib that expression ^(?=.*\d)(?=.*[a-z])(?=.*[A-Z]).{8,15}$ didn’t work for JavaScript. I responded mainly because the alternative offered didn’t wasn’t really an equivalent expression. But when I looked at Read More... Posted Tuesday, October 05, 2004 11:26 AM by mash | 1 Comments Filed under: Bugs/Quirks