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Short, Self-Contained, Correct Example
Lines 44 - 63 of your sample code would have been sufficient, if I am understanding your question correctly.
my %substitutions = ( 'Xi Wong' => 'Lucca P.', 'MG5237ALL5X' => 'MG54
+15DP', 'SI' => 'SA' );
while (my $line = <$base_fh>) {
foreach my $was (keys %substitutions) {
$line =~ s/$was/$substitutions{$was}/g;
}
print $New_fh $line;
}
But God demonstrates His own love toward us, in that while we were yet sinners, Christ died for us. Romans 5:8 (NASB)