On Tue, 3 May 2005, Greg Sheridan wrote: > $dose_density =~ s/[A-Za-z\/ ]//g;
This is a substitution: s/// is the usual syntax for this. Substutions take a match between the first delimiters, and replace each instance of it with whatever is found in the second delimiters. Therefore, it matches any of: * the range of characters A-Z * the range of characters a-z * the forward slash (which, as a "metacharacter", has to be escaped) * a space The matched character is replaced with nothing (i.e. deleted). The g "global" flag at the end causes this match to be repeated for all instances of the matched range throughout the $dose_density variable. Therefore, it's deleting all letters, slashes, or spaces, and leaving behind whatever is left -- digits, other symbols, etc. For more, an introductory Perl book would be a good place to turn, or if you want to focus on this aspect of Perl in depth, _Mastering Regular Expressions_ is a fantastically detailed overview of the subject. -- Chris Devers [EMAIL PROTECTED] http://devers.homeip.net:8080/blog/ np: 'audio_2005.04.24.2_last_three_songs_of_main_set' by The Dresden Dolls from 'Live at the Paradise Rock Club - 04.24.2005' -- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] <http://learn.perl.org/> <http://learn.perl.org/first-response>
