This form of matching is more common: 
if ($key =~ m/(node[0-9]*)/) { 
  print "You entered " .$1. ":" . $ref->{$1}. "\n";
}

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Sorry if my advice was wrong.

In reply to Re^3: Partial string match -- with a twist. by aitap
in thread Partial string match -- with a twist. by smw6181

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