There are a few things I'd do differently, first the open I'd write as
open my $FH, '<', $file or die "Can't open $file: $!\n";
- The lexical file handle $FH is limited is scope to just the block of code it appears in so won't clobber file handles opened else where. Probably not a concern for a short script but it still a good habit.
- The three argument form of open where the open mode is specified separately is safer especially when $file comes from an untrusted source.
- I use low precedence or so I can get rid of the brackets
- I put $! in the error message so I know why the open failed.
The loop I'd rewite as this
use Data::Dumper;
my @arr;
while (<DATA>) {
chomp;
push @arr, $1 if m{^ +\s+(//.*)};
}
print Dumper \@arr;
__DATA__
// humpty dumpty
// sat on a wall
-// eating her curds and whey
// humpty dumpty
// had a great fall
which produces
$VAR1 = [
'// humpty dumpty',
'// sat on a wall',
'// humpty dumpty',
'// had a great fall'
];
Just a couple of points
- I use m{ } to avoid the leaning toothpicks.
- I use capturing parentheses to grab the bit of string I want, if there is a match it is in $1 and it is pushed onto the array
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