Without using $key == $cid,
How to construct a pattern so that $key match $cid.
I do not understand why in the undermentioned script, $key match $cid.
All explanations would be very much appreciated.
Thanks
use strict;
my $cid = '';
my $key = '1234';
if ($key=~/\b$cid\b/) {
print 'true';
}else {print 'false'};
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