Why make your life more difficult than it needs to be? I prefer the straightforward approach: First deal with comments by making them whitespace, then deal with extraneous whitespace:
while (<DATA>) {
chomp;
s/#.*$/ /; # first replace any comments with space
# skip this line if it consists only of whitespace (or nothing)
next if /^\s*$/;
# at this point we KNOW there is at least some non-blank on the line
# which is also non-comment.
# Just grab everything sans leading/trailing whitespace
my ($non_blank) = /^\s*(.+)\s*$/;
push @enabled_lines, $non_blank if $non_blank; # 'if' may not be ne
+cessary
}
Of course this does not account for escaped comment characters, since I thought it would obscure the simplicity (I leave it as an exercise for the reader).
dmm
You can give a man a fish and feed him for a day ...
Or, you can teach him to fish and feed him for a lifetime
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