Interactively Test Regexes

Here's a short one-liner that will let you interactively test a regex from the command line. You supply the regex as an argument and then you subsequently type in strings. It will print "Yes" for a match, and "No" for a non-match.

perl -lpe'BEGIN{$r=pop} $_=/$r/?"Yes":"No"' your_regex_here
[download]

Or for Win32:

perl -lpe"BEGIN{$r=pop} $_=/$r/?'Yes':'No'" your_regex_here
[download]

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Re: Interactively Test Regexes by Aristotle (Chancellor) on Mar 16, 2003 at 00:21 UTC
To make it a little more interesting: `perl -lpe'BEGIN{$r=pop} $_=/$r/?"Yes, $&":"No"' your_regex_here` [download] Makeshifts last the longest.	[reply] [d/l]
Re: Interactively Test Regexes by halley (Prior) on Apr 11, 2003 at 14:18 UTC
I can imagine a little CGI HTML/CSS page which would make this a more visual process. Show the pattern, and show the sample string. For each token in the regex, or just for each grouping set of parens, wrap both the regex and the subsequent sample string with <span style=...> tags that set the background colors for each range. -- `[ e d @ h a l l e y . c c ]`	[reply]
Re: Interactively Test Regexes by Murcia (Monk) on Aug 05, 2003 at 15:35 UTC
How to run it? when I run it on command line, I get cannot find file ...	[reply]