RetroFed Forum

Hello!

This space is for sharing news, experiences, announcements, questions, showcases, etc. regarding concatenative programming concepts and tools.

We'll also take any programming described as:

pipelined
stack-oriented
tacit
postfix / reverse Polish notation (RPN)
fluent
cascading
chained

From Wikipedia:

A concatenative programming language is a point-free computer programming language in which all expressions denote functions, and the juxtaposition of expressions denotes function composition. Concatenative programming replaces function application, which is common in other programming styles, with function composition as the default way to build subroutines.

For example, a sequence of operations in an applicative language like the following:

y = foo(x)
z = bar(y)
w = baz(z)

...is written in a concatenative language as a sequence of functions:

x foo bar baz

Active Languages

Let me know if I've got any of these misplaced!

Primarily Concatenative

Concatenative-ish, Chain-y, Pipe-y, Uniform Function Call Syntax, etc.

Cheat Sheets & Tutorials

Discord

IRC

#concatenative on irc.libera.chat

Wikis

concatenative wiki

Wikipedia Topics

Subreddits

GitHub Topics

Blogs

planet-factor

Practice

Codewars (Forth, Factor, Nim)
Advent of Code
Code Golf (Forth, Factor, Nim)
Project Euler
Exercism (Nim)
Perl Weekly Challenge

Welcome to the nostalgia-filled piefed instance of yesteryear.

Open Registration with Application questionnaire.

If you have a question or comment you can post in !meta@retrofed.com or message @DosDude@retrofed.com or @Die4Ever@retrofed.com

In case of downtime and/or emergency, we will post updates on @DosDude@mastodon.social

Some rules we try to uphold:

Be civil. Bigotry is not welcome. This includes (but is not limited to): transphobia, queerphobia, racism, ageism and ableism. We do not promote hate.
Communities need to be Retro or Retro-adjacent.
Please don't upload pornographic content. (use an external image host for that)

Hello!

This space is for sharing news, experiences, announcements, questions, showcases, etc. regarding concatenative programming concepts and tools.

We'll also take any programming described as:

pipelined
stack-oriented
tacit
postfix / reverse Polish notation (RPN)
fluent
cascading
chained

From Wikipedia:

A concatenative programming language is a point-free computer programming language in which all expressions denote functions, and the juxtaposition of expressions denotes function composition. Concatenative programming replaces function application, which is common in other programming styles, with function composition as the default way to build subroutines.

For example, a sequence of operations in an applicative language like the following:

y = foo(x)
z = bar(y)
w = baz(z)

...is written in a concatenative language as a sequence of functions:

x foo bar baz

Active Languages

Let me know if I've got any of these misplaced!

Primarily Concatenative

Concatenative-ish, Chain-y, Pipe-y, Uniform Function Call Syntax, etc.

Cheat Sheets & Tutorials

Discord

IRC

#concatenative on irc.libera.chat

Wikis

concatenative wiki

Wikipedia Topics

Subreddits

GitHub Topics

Blogs

planet-factor

Practice

Codewars (Forth, Factor, Nim)
Advent of Code
Code Golf (Forth, Factor, Nim)
Project Euler
Exercism (Nim)
Perl Weekly Challenge

Hello!

This space is for sharing news, experiences, announcements, questions, showcases, etc. regarding concatenative programming concepts and tools.

We'll also take any programming described as:

pipelined
stack-oriented
tacit
postfix / reverse Polish notation (RPN)
fluent
cascading
chained

From Wikipedia:

A concatenative programming language is a point-free computer programming language in which all expressions denote functions, and the juxtaposition of expressions denotes function composition. Concatenative programming replaces function application, which is common in other programming styles, with function composition as the default way to build subroutines.

For example, a sequence of operations in an applicative language like the following:

y = foo(x)
z = bar(y)
w = baz(z)

...is written in a concatenative language as a sequence of functions:

x foo bar baz

Active Languages

Let me know if I've got any of these misplaced!

Primarily Concatenative

Concatenative-ish, Chain-y, Pipe-y, Uniform Function Call Syntax, etc.

Cheat Sheets & Tutorials

Discord

IRC

#concatenative on irc.libera.chat

Wikis

concatenative wiki

Wikipedia Topics

Subreddits

GitHub Topics

Blogs

planet-factor

Practice

Codewars (Forth, Factor, Nim)
Advent of Code
Code Golf (Forth, Factor, Nim)
Project Euler
Exercism (Nim)
Perl Weekly Challenge

Welcome to the nostalgia-filled piefed instance of yesteryear.

Open Registration with Application questionnaire.

If you have a question or comment you can post in !meta@retrofed.com or message @DosDude@retrofed.com or @Die4Ever@retrofed.com

In case of downtime and/or emergency, we will post updates on @DosDude@mastodon.social

Some rules we try to uphold:

Be civil. Bigotry is not welcome. This includes (but is not limited to): transphobia, queerphobia, racism, ageism and ableism. We do not promote hate.
Communities need to be Retro or Retro-adjacent.
Please don't upload pornographic content. (use an external image host for that)

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Writing Anteforth, a Forth-like in SPARK (pyjarrett.github.io)	0	Andy	1	Thu Jan 15, 2026 9:12 am »
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OutSquareCapital/pyochain: Rust-like Iterator, Result and Option in Python (github.com)	0	Andy	1	Wed Jan 7, 2026 10:43 pm »
evhub/coconut: Simple, elegant, Pythonic functional programming (github.com)	0	Andy	1	Tue Jan 6, 2026 6:19 pm »
mystery-git/Kothonic: The Kothonic way to write Python (github.com)	0	Andy	1	Tue Jan 6, 2026 5:51 pm »
Release v0.8.0 · mitchpaulus/mshell (github.com)	0	Andy	1	Mon Dec 29, 2025 5:21 pm »
romforth: Ultra Portable, Small, Baremetal Forth for various processors (github.com)	0	Andy	1	Sun Dec 21, 2025 8:28 pm »
Postfix Macros and let place (Rust) (nadrieril.github.io)	0	Andy	1	Tue Dec 16, 2025 12:52 am »
Indexed Reverse Polish Notation, an Alternative to AST (burakemir.ch)	0	Andy	1	Sat Dec 13, 2025 6:46 pm »
DNS LOC Records – Re: Factor (re.factorcode.org)	0	Andy	1	Wed Dec 10, 2025 11:52 pm »
Release 0.101 · factor/factor (github.com)	0	Andy	1	Tue Dec 9, 2025 6:11 am »
An Attempt at a Compelling Articulation of Forth's Practical Strengths and Eternal Usefulness (im-just-lee.ing)	0	Andy	1	Mon Dec 8, 2025 3:25 am »
zxcvbn \| Re: Factor (re.factorcode.org)	0	Andy	1	Sat Dec 6, 2025 9:03 am »
Ohlang: rpn stack based language implemented in js that runs both in the browser and node (vms-has-a.great-site.net)	0	Andy	1	Fri Dec 5, 2025 5:24 pm »