What a bunch of lines! If I wanted to ignore some pattern, why not:
my @files = grep {!/pattern_I_want_to_ignore/} `ls`;
Or for the grasshoppers who haven't realized yet that Perl started its life as a glue language, and never deviated from that, and hence get the rashes as soon as they see a call to an external program:
use autodie;
opendir my $dir, ".";
my @files = grep {!/pattern_I_want_to_ignore/}
sort grep {!/^\./} # simulate ls
readdir $dir;
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