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Re^5: Pattern Matching in Arrays

by ciderpunx (Vicar)
on May 13, 2009 at 17:01 UTC ( #763839=note: print w/replies, xml ) Need Help??

in reply to Re^4: Pattern Matching in Arrays
in thread Pattern Matching in Arrays

I liked the split method recommended above.
Can you use the OR in the split command to pattern match at the time of the split?
You want the version number to be the last element of the list that split returns, so you could reverse the list, grab the last element, slurp the rest into an array, reverse that array back the right way round again and join the elements with underscores.
There are filenames without "_": 12345.pdf
Yuk, make an @unversioned array and push them into that if you only get one element from split?
#!/usr/bin/perl use strict; use warnings; my @data = qw/12345.pdf 12345_-v1.pdf 12345_Av1.pdf 123456_-v1.pdf 123456_Av1.pdf 123456_Bv1.pdf g05495_1_-v1.pdf zprt0019548_wiper_die-nc_-1.pdf zprt0019548_wiper_die-nc +_-2.pdf zprt0016809_fg_tooling_A2.pdf zprt0016809_fg_tooling_A +3.pdf/; my %hash; my @unversioned; for my $f (sort @data) { my ($version,@key) = reverse split /_/,$f; my $key = join "_",reverse @key; if($key) { $hash{$key} = $version; } else { push @unversioned,$version; } } for my $key (keys %hash) { print $key . '_' . $hash{$key} . "\n"; } print join "\n",@unversioned,q{};
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