Alright, I sort of understand now.

This is my "more Perlish" proposal: 

#!/usr/bin/perl
use strict;
use warnings;

my $first_line = <DATA>;
chomp $first_line;
$first_line =~ s/,/chr(31)/eg;
print $first_line, chr(30);
while (<DATA>) {
    chomp;
    my @fields = split /,"|",/;
    $fields[2] =~ s/,/chr(31)/eg;
    print join chr(31), @fields, chr(30);
}

__DATA__
Country,Name,Address,Age
Andorra,"Aileen, Daquan, Hammett, Malachi",17014,69
Solomon Islands,"Cyrus, Giacomo, Gretchen, Curran",76935,26
Czech Republic,"Briar, Larissa, Sybil, Colin",29565,88
(...)

[download]
As such, the program produces the same strange looking output as the one I've shown before: 
CountryNameAddressAgeAndorraAileen, Daquan, Hammett, 
Malachi1701469Solomon IslandsCyrus, Giacomo, Gretchen,
Curran7693526Czech RepublicBriar,

[download]
But once piped to the other program that you have shown, this produces, I believe, the same output as your program piped into the same second program: 
Country|Name|Address|Age
Andorra|Aileen, Daquan, Hammett, Malachi|17014|69|
Solomon Islands|Cyrus, Giacomo, Gretchen, Curran|76935|26|
Czech Republic|Briar, Larissa, Sybil, Colin|29565|88|
Japan|Wyatt, Gavin, Derek, Coby|10734|52|
(...)

[download]
The full output is displayed below: 

Country|Name|Address|Age
Andorra|Aileen, Daquan, Hammett, Malachi|17014|69|
Solomon Islands|Cyrus, Giacomo, Gretchen, Curran|76935|26|
Czech Republic|Briar, Larissa, Sybil, Colin|29565|88|
Japan|Wyatt, Gavin, Derek, Coby|10734|52|
Gabon|Tobias, Maya, April, Quintessa|77397|95|
Jersey|Reece, Clarke, Idona, Troy|85473|73|
Finland|Paul, Quamar, Leigh, Adara|09441|66|
Tanzania|Dexter, Macaulay, Colorado, Lucas|47636|56|
Djibouti|Rhonda, Minerva, Thomas, Francis|41040|78|
British Indian Ocean Territory|Beck, Kiara, Nathan, Rhiannon|42270|59|
Marshall Islands|Evangeline, Drew, Joan, Ignatius|11305|37|
Albania|Sigourney, Brock, Colette, Wynne|15359|34|
Ireland|Wilma, Lacota, Clare, Chiquita|35334|85|
South Africa|Lacey, Tamara, Abigail, Ursa|54094|15|
Albania|Eliana, Tarik, Plato, Lucy|10625|98|
Burundi|Sara, Kay, Bo, Miriam|11557|82|
Trinidad and Tobago|Griffin, Claire, Sage, Leroy|71860|46|
Timor-Leste|Fletcher, Britanney, Heather, Stella|14227|49|
Macao|Nicole, Brittany, Mark, Reese|52189|35|
Niue|Sawyer, Ferris, Josiah, Halla|16491|23|
Singapore|Brock, Emerald, Veronica, Derek|41836|73|
Syria|Keane, Basia, Wyoming, Orla|27003|80|
Micronesia|Jared, Beverly, Kimberly, Richard|87004|31|
South Africa|Amy, Chaim, Xandra, Raven|83099|73|
France|Barbara, Jerry, Karyn, Ray|63790|19|
Cocos (Keeling) Islands|Jaden, Natalie, Eugenia, Adrian|29692|7|
Tonga|Barrett, Chaney, Adena, Aurora|78475|38|
Turkmenistan|Echo, Freya, Ethan, Jeanette|50055|58|
Bermuda|Keely, Laura, Winter, Dakota|21429|5|
Mayotte|Hedy, Jescie, Randall, Chancellor|27322|45|
Spain|Ora, Tashya, Linda, Velma|25194|30|
Slovenia|Tucker, Allegra, Mari, Hu|48334|80|
Honduras|Abbot, Cheryl, Alana, Owen|96426|39|
Holy See (Vatican City State)|Rigel, Illiana, Ignacia, Hope|55041|62|
Tonga|Caryn, Shoshana, Hilel, Amanda|36756|44|
Sweden|Pandora, Charity, Mariko, Cathleen|14178|41|
Holy See (Vatican City State)|Katelyn, Otto, Francis, Karina|51371|77|
Armenia|Emmanuel, Sara, Veda, Yolanda|84455|24|
Cayman Islands|Deborah, Randall, Stacy, Melvin|73680|77|
"Bonaire, Sint Eustatius and Saba|"Charissa, Lana, Liberty, Quail|4451
+7|18|
Northern Mariana Islands|Fitzgerald, Jorden, Harrison, Cora|13262|95|
Iran|Joshua, Fredericka, Noah, Erich|75209|91|
Finland|Neil, Natalie, Sheila, Gisela|65124|56|
Australia|Knox, Quinn, Warren, Tanisha|62518|65|
Bahrain|Hayes, Alvin, Imogene, Heather|36073|50|
Botswana|Justina, Xena, Maite, Tanner|20482|93|
Antigua and Barbuda|Leroy, TaShya, Malachi, Jennifer|04462|48|
Turkey|Gretchen, Iona, Kim, Alice|87848|54|
Martinique|Carl, Blaze, Kenyon, Tallulah|82059|99|
Macao|Hiram, Graiden, Joshua, Quail|45176|71|
Botswana|Hammett, Zeus, Kadeem, Kasimir|22147|47|
Brunei|Quentin, Darrel, Roanna, Paul|73691|26|
Solomon Islands|Dominic, Brynne, Sonia, Phillip|06263|48|
Poland|Roanna, Quentin, Barrett, Ciara|24730|83|
Isle of Man|Illana, Stewart, Nita, Arden|57975|75|
Libya|Channing, Darius, Pandora, Hedda|88969|90|
Haiti|Rama, Francesca, Nyssa, Gray|50404|20|
Hungary|Garth, Colton, Brody, Jael|84951|69|
Malaysia|Hashim, Todd, Olga, Amelia|00953|13|
Saudi Arabia|Anne, Basil, Walter, Chaney|93043|90|
Saudi Arabia|Rudyard, Cassady, Myra, Kaseem|19202|62|
Australia|Montana, Jackson, Lavinia, Raja|18775|34|
Myanmar|Camilla, Arden, Stephanie, Bruce|17434|4|
Kenya|Olympia, Michelle, Emerald, Judah|31399|50|
Latvia|Karen, Jared, Celeste, Dana|33911|48|
Somalia|Hammett, Tyrone, Caryn, Ima|91423|5|
Wallis and Futuna|Amela, Medge, Zephania, Chase|13922|69|
Mayotte|Freya, Mara, Madison, William|97119|27|
Sao Tome and Principe|Sara, Sheila, Anthony, Bruno|62269|4|
Saint Martin|Carlos, Brian, Carson, Kylynn|96705|74|
Bolivia|Herman, Brynn, Jamalia, Quemby|70279|41|
Nicaragua|Quin, Ira, Kiona, Calista|92169|87|
Gabon|Catherine, Olga, Hashim, Deirdre|06748|26|
Swaziland|Inez, Charde, Kalia, Ferdinand|06392|64|
Ethiopia|Karyn, Martha, Honorato, Leroy|81013|74|
Reunion|Jonas, Inez, Quinn, George|45690|2|
"Virgin Islands, British|"Otto, Macon, Caldwell, Sasha|87676|49|
Botswana|Sean, Jordan, Hu, Octavius|26531|4|
Egypt|Karleigh, David, Marsden, Emi|53564|84|
Lesotho|Marcia, Melyssa, Hayfa, Kasper|78219|12|
Burundi|Tana, Reece, Deirdre, Asher|01186|84|
Greenland|Zelda, Dale, Adara, Randall|50939|13|
Macao|Blaze, Carol, Ryan, Jamal|85508|24|
Seychelles|Gwendolyn, Harrison, Lee, Martha|89440|1|
Senegal|Thaddeus, Shana, Bryar, Louis|64079|45|
Qatar|Anastasia, Maggy, Joshua, Byron|05381|41|
Pakistan|Jamal, Hanna, Emmanuel, Ira|09657|75|
Angola|Jacob, Kennedy, Ross, Ria|82465|19|
Estonia|Alexa, Geraldine, Dexter, Maisie|81424|63|
Northern Mariana Islands|Anthony, Dana, Colorado, Emi|03919|33|
Barbados|Lev, Harlan, Adria, Abraham|23897|41|
Paraguay|Regan, Amos, Quemby, Lysandra|93955|13|
China|Harrison, Leslie, Steven, Gemma|58927|40|
Philippines|Dante, George, Amaya, Dante|23359|9|
Saint Kitts and Nevis|Charles, Ronan, Dakota, Hiram|38760|3|
Martinique|Nichole, Maisie, Vernon, Leah|80565|70|
Iran|Ignacia, Nicholas, Richard, Clarke|38992|38|
Antarctica|Iliana, Octavius, Serena, Guinevere|57025|10|
Micronesia|Alexander, Angela, Wylie, Axel|19982|82|
Bangladesh|Claire, Laura, Phillip, Pascale|70016|5|

[download]

As you can see, "more Perlish" often means much shorter code (although I really did not try to make it particularly concise and I decided, for simplicity, to process the header line separately. If you ignore that and forget about boiler plate code at the beginning, the real program holds in 5 lines). I also think that, on very large input, my version is most probably considerably faster.

I'll be glad to give more information if there is anything you don't understand.

In reply to Re: Suggestions to make this code more Perlish by Laurent_R
in thread Suggestions to make this code more Perlish by ricardo_sdl

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