> Why are there still no empty elements in the returned array
> for the items that didn't match the pattern? @must == 2
>
> I am just befuddled but this "paradox"
> >
> > Thus, map { m!(.*)/\*! } LIST will return $1 or () for each
> > element of the
> > LIST.
When you have
LIST2 = map { m!^(.*)/\*$! } LIST1
It's shorthand for a loop like:
foreach my $el (@LIST1) {
if($el =~ m!^(.*?)/\*$!) {
push @LIST2,$1
} else {
push @LIST2,()
}
}
So when the regular expression doesn't match, it pushes an empty list,
which adds nothing to the array.
-dave
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