The "$testing" is replaced with "dollar" with the below code 
#!/usr/bin/perl -w
use strict;
use warnings;
my %words = map { $_ => 1 } qw($Word $name $test);
my $line = '$Word $ $ $ $test $testing';
$line =~ s/(\$\w*)/exists $words{$1} ? $1 : " dollar "/eg;
print "$line\n\n"

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The output which i need is if the values are not present in array, then $Word dollar dollar dollar $test dollartesting

In reply to Re^4: Use of uninitialized value in concatenation by gem555
in thread Use of uninitialized value in concatenation by gem555

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