Yesterday I wrote ~50 lines of Perl that solved a one-off problem. In among that was a group of simple regexes that I am sure could be combined or written better if only I knew how. So I'd like to learn more, if someone would be kind enough to go all Perlmonks on me or attempt a Socratic dialogue. The code I wrote is:

my $plsname = $curdir;
$plsname =~ s/^\Q$startdir\E//i;
$plsname =~ s/\//_/g;
$plsname =~ s/^_?//;
$plsname .= '.pls';

[download]

with (e.g.) $curdir = 'Y:\Music\Schubert\Lieder\Terfel', $startdir = 'Y:\Music' and wanting 'Schubert_Lieder_Terfel.pls'

I tried to combine the second and fourth lines of the snippet, but while I think I could have solved that on my own, I realised that I was going to need multiple regexes and idleness set in. I suspect I should need only one regex, but my thinking processes are flawed.

What the rest of the code is doing is using File::Find to recurse through every subdirectory in the start directory and write a playlist file to another location. I have some 6,700 files in 300 directories. I now have a playlist for every directory, which is what I wanted.

Regards,

John Davies

In reply to Combining regexes by davies

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