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  1. or download this
      my $first;
   ...
  my $second = $first;
  $second =~ s/some/substitution/;
  2. or download this
    my @output = map {
        my $temp = $_;
        $temp =~ s/some/subst/g;
        $temp
    } @input;
  3. or download this
    use Regex::FunctionalSubstitute;
my $first;
 ...
my $second = $first \~ s/some/subst/g;
  4. or download this
    my @output = map {
        $_ \~ s/some/subst/g;
    } @input;
  5. or download this
    package Regex::FunctionalSubstitute;
use Filter::Simple;
...
);

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