[Israel.pm] The qr// operator

Eli Billauer eli at billauer.co.il
Tue Dec 30 14:17:29 PST 2008

The open question here is about performance. As for readability, the 
example shows pretty clearly that a complex regular expression can be 
made accessible to mortals.

And yes, I suppose that gradually creating a complex regular expression 
as a string, with parentheses carefully put in place, would do the job. 
Have you ever seen someone doing that?

The point is, that for some reason, setting up a regular expression in 
stages is pretty rare (read: never seen it until now). What is much more 
commonplace is a bombardment of cryptic characters. And I sincerely 
wonder if there is any reason in the world why regular expressions 
should look that way.


Avishalom Shalit wrote:

> isn't qr a performance thing ?
> couldn't you have gotten the same readability with strings ?

Web: http://www.billauer.co.il

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