my $regex = '\b(?:' . join('|', @nums) . ')\b'; # update: fixed concatenation issue

##</code><code>##

my $regex = '\b(' . join('|', @nums) . ')\b'; # update: fixed concatenation issue

##</code><code>##

DB<1> $_ = "oh blah dee"
DB<2> ($x) = m/(blah)/
DB<3> x $x
0  'blah'