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](https://en.wikipedia.org/wiki/Concatenative_programming_language):
> 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
- [Forth](https://forth-standard.org/)
- [Factor](https://factorcode.org/)
- [Retro](http://www.retroforth.org/)
- [min](https://min-lang.org/)
- [Joy](https://github.com/Wodan58/Joy)
- [Uiua](https://www.uiua.org/)
- [kcats](https://github.com/skyrod-vactai/kcats)
- [iNet](https://github.com/cicada-lang/inet)
- [mlatu](https://github.com/mlatu-lang/mlatu)
- [Execline](http://skarnet.org/software/execline/grammar.html)
#### Concatenative-ish, Chain-y, Pipe-y, Uniform Function Call Syntax, etc.
- [Nim](https://nim-lang.org/)
- [Roc](https://www.roc-lang.org/tutorial#the-pipe-operator)
- Unix Pipes
- [Cognate](https://github.com/cognate-lang/cognate)
- [D Programming Language](https://dlang.org/)
- [Koka](http://koka-lang.org/)
---
### Cheat Sheets & Tutorials
- [Learn Factor in Y minutes](https://learnxinyminutes.com/docs/factor/)
- [A panoramic tour of Factor](https://andreaferretti.github.io/factor-tutorial/)
- [Factor Tutorial Video](https://programming.dev/post/13396636)
### Discord
- [Concatenative](https://discord.gg/jav75FpVHg)
- [Factor](https://discord.gg/QxJYZx3QDf)
### IRC
- #concatenative on irc.libera.chat
### Wikis
- [concatenative wiki](https://www.concatenative.org/)
### Wikipedia Topics
- [Reverse Polish Notation](https://en.wikipedia.org/wiki/Reverse_Polish_notation)
- [Uniform Function Call Syntax](https://en.wikipedia.org/wiki/Uniform_Function_Call_Syntax)
- [Stack-Oriented Programming](https://en.wikipedia.org/wiki/Stack-oriented_programming)
- [Tacit Programming](https://en.wikipedia.org/wiki/Tacit_programming)
- [Method Chaining](https://en.wikipedia.org/wiki/Method_chaining)
- [Method Cascading](https://en.wikipedia.org/wiki/Method_cascading)
- [Fluent Interface](https://en.wikipedia.org/wiki/Fluent_interface)
### Subreddits
- [r/concatenative](https://www.reddit.com/r/concatenative/)
- [r/factor](https://www.reddit.com/r/factor/)
### GitHub Topics
- [Stack-Based Language](https://github.com/topics/stack-based-language)
- [Concatenative](https://github.com/topics/concatenative)
- [Concatenative Language](https://github.com/topics/concatenative-language)
- [Concatenative Programming Language](https://github.com/topics/concatenative-programming-language)
- [Concatenative Interpreting Language](https://github.com/topics/concatenative-interpreting-language)
- [Fluent Interface](https://github.com/topics/fluent-interface)
- [Method Chaining](https://github.com/topics/method-chaining)
### Blogs
- [planet-factor](https://planet.factorcode.org/)
### Practice
- [Codewars](https://www.codewars.com/) (Forth, Factor, Nim)
- [Advent of Code](https://adventofcode.com/)
- [Code Golf](https://code.golf/) (Forth, Factor, Nim)
- [Project Euler](https://projecteuler.net/)
- [Exercism](https://exercism.org/) (Nim)
- [Perl Weekly Challenge](https://theweeklychallenge.org/challenges/)
Concatenative Programming