Deane,
Parens are needed for capturing. If you need grouping, you should use
<wait for it> non-capturing parens:
/^(?:this|that)$/
The diff is, no memory overhead in storing the capture and no <mumble> in
doing the actual capture. Just grouping (needed here, I add, perhaps
unnecessarily) to make sure the anchors "^" and "$" are applied to the
alternatives as a group, not:
/^this|that$/
which'd really be:
/^this/ or /that$/
Not sure about the /o opt/compile business - it is supposed to compile the
RE, which is why you *don't* want to use it w/ a var:
foreach my $name ( qw( andy deane george katrina ) ) {
$_ = "where's $name now?";
foreach my $re_name ( qw( andy deane george katrina ) ) {
print "Trying $re_name\n";
if ( /where's ($re_name)/o ) {
print "Found $1\n";
} # if /where's
} # foreach re_name
} # foreach name
The RE becomes /where's andy/ the first time through and that's that.
a
Andy Bach, Sys. Mangler
Internet: [EMAIL PROTECTED]
VOICE: (608) 261-5738 FAX 264-5932
"...when you're trying to build a house of cards, the last thing you
should do is blow hard and wave your hands like a madman."
-- Rupert Goodwins
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