Regex 101 Exercise S1 - Discussion

re: Regex 101 Exercise S1 - Discussion

David Grant — Thu, 27 Oct 2005 20:13:23 GMT

Those comments are analogous to these C# comments:

int capacity = bag.Capacity; // Assign bag capacity to capacity.
int i = 3; // Assign 3 to i.
string firstName = "David"; // Set firstName = David.
double acreage; // Declare acreage.

I know this is just an exercise, but I'd only use the multi-line + comments on complicated expressions.

re: Regex 101 Exercise S1 - Discussion

Avonelle Lovhaug — Thu, 27 Oct 2005 20:33:25 GMT

This is the best explanation of a regular expression that I have ever seen. I regularly struggle with regular expressions, and I found this approach very helpful (including the multi-line comments).

re: Regex 101 Exercise S1 - Discussion

Michael — Thu, 27 Oct 2005 22:33:58 GMT

Won't \d match a lot more than just ASCII 0-9? For example, regex.Match("\x066199-55-1827") also returns true.

http://blogs.msdn.com/oldnewthing/archive/2004/03/09/86555.aspx

re: Regex 101 Exercise S1 - Discussion

ericgu — Thu, 27 Oct 2005 23:23:36 GMT

Michael,

The answer to your question is, of course, yes. But that's exactly the kind of detail that it is critical to omit in an introductory explanation. The more information is presented, the harder it is for people to pull out the important information, and the difference between [0-9] and \d is not important information to somebody learning regex.

For the same reason, I didn't mention that the behavior of ^ and $ is modified by the RegexOptions.Multiline flag.

re: Regex 101 Exercise S1 - Discussion

Jeff Atwood — Fri, 28 Oct 2005 00:48:09 GMT

> I'm also considering disabling comments on the exercise posts so that people aren't distracted by them.

What's distracting about the comments?

http://www.post-literate.com/gerpunx/archives/2005/01/prepare_to_lose_your_mind.php

re: Regex 101 Exercise S1 - Discussion

Brian — Mon, 31 Oct 2005 17:41:11 GMT

I like the idea of disabling comments on exercises. I'm weak willed and will usually choose to look at comments before trying an exercise.

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