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## Example files for the title:  

# Perl Cookbook 2nd Edition, by Tom Christiansen

[![Perl Cookbook 2nd Edition, by Tom Christiansen](http://akamaicovers.oreilly.com/images/9780596003135/cat.gif)](https://www.safaribooksonline.com/library/view/title/0596003137//)

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#!/usr/bin/perl -w

# fixstyle - switch first set of <DATA> strings to second set

#   usage: $0 [-v] [files ...]

use strict;

my $verbose = (@ARGV && $ARGV[0] eq '-v' && shift);

if (@ARGV) {

    $^I = ".orig";          # preserve old files

} else {

    warn "$0: Reading from stdin\n" if -t STDIN;

}

my $code = "while (<>) {\n";

# read in config, build up code to eval

while (<DATA>) {

    chomp;

    my ($in, $out) = split /\s*=>\s*/;

    next unless $in && $out;

    $code .= "s{\\Q$in\\E}{$out}g";

    $code .= "&& printf STDERR qq($in => $out at \$ARGV line \$.\\n)" 

                                                        if $verbose;

    $code .= ";\n";

}

$code .= "print;\n}\n";

eval "{ $code } 1" || die;

__END__

analysed        => analyzed

built-in        => builtin

chastized       => chastised

commandline     => command-line

de-allocate     => deallocate

dropin          => drop-in

hardcode        => hard-code

meta-data       => metadata

multicharacter  => multi-character

multiway        => multi-way

non-empty       => nonempty

non-profit      => nonprofit

non-trappable   => nontrappable

pre-define      => predefine

preextend       => pre-extend

re-compiling    => recompiling

reenter         => re-enter

turnkey         => turn-key