#!/usr/bin/perl

# http://perlmonks.org/?node_id=1172192

use strict;
use warnings;

while(<DATA>)
  {
  print;
  s/(nr\d+)(?{"calc($1);"}) | (\d+)(?{4 * $2}) /$^R/gx;
  print;
  }

__DATA__
hello nr34,nr56,78, 98 , hi, 76

[download]

In reply to Re: String substitution by Anonymous Monk
in thread String substitution by kepler

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