use strict;
use warnings;

use feature qw{ say };

my $winLineTerm = qq{\x0d\x0a};
my( $file, $writeFH, $readFH );

say q{-} x 20;
open $writeFH, q{>}, \ $file or die $!;
print $writeFH qq{ABC${winLineTerm}DEF$winLineTerm};
close $writeFH or die $!;

say q{No measures};
open $readFH, q{<}, \ $file or die $!;
while ( <$readFH> )
{
    say q{Before chomp()};
    say for map { sprintf q{  %#02x}, ord } split m{};
    say q{After chomp()};
    chomp;
    say for map { sprintf q{  %#02x}, ord } split m{};
}
close $readFH or die $!;
say q{-} x 20;

say q{Change default line terminator};
{
    local $/ = $winLineTerm;
    open $readFH, q{<}, \ $file or die $!;
    while ( <$readFH> )
    {
        say q{Before chomp()};
        say for map { sprintf q{  %#02x}, ord } split m{};
        say q{After chomp()};
        chomp;
        say for map { sprintf q{  %#02x}, ord } split m{};
    }
    close $readFH or die $!;
}
say q{-} x 20;

say q{open() with :crlf I/O layer};
open $readFH, q{<:crlf}, \ $file or die $!;
while ( <$readFH> )
{
    say q{Before chomp()};
    say for map { sprintf q{  %#02x}, ord } split m{};
    say q{After chomp()};
    chomp;
    say for map { sprintf q{  %#02x}, ord } split m{};
}
close $readFH or die $!;
say q{-} x 20;

##</code><code>##

--------------------
No measures
Before chomp()
  0x41
  0x42
  0x43
  0xd
  0xa
After chomp()
  0x41
  0x42
  0x43
  0xd
Before chomp()
  0x44
  0x45
  0x46
  0xd
  0xa
After chomp()
  0x44
  0x45
  0x46
  0xd
--------------------
Change default line terminator
Before chomp()
  0x41
  0x42
  0x43
  0xd
  0xa
After chomp()
  0x41
  0x42
  0x43
Before chomp()
  0x44
  0x45
  0x46
  0xd
  0xa
After chomp()
  0x44
  0x45
  0x46
--------------------
open() with :crlf I/O layer
Before chomp()
  0x41
  0x42
  0x43
  0xa
After chomp()
  0x41
  0x42
  0x43
Before chomp()
  0x44
  0x45
  0x46
  0xa
After chomp()
  0x44
  0x45
  0x46
--------------------