this post was submitted on 10 Jan 2025
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Concatenative Programming

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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:

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

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Designing Code For Forward Progress (rtpg.co)
submitted 1 month ago by Andy@programming.dev to c/concatenative@programming.dev
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Discussion on lobsters

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[–] Andy@programming.dev 1 points 1 month ago

The given Uiua example (mercifully given using words rather than the symbols):

[3 4 5 10 23]
divide length on /+

For all the talk about "forward" it's uncomfortable to me how the Uiua evaluation within a line happens backward.

An equivalent in Factor, where keep is close to on:

{ 3 4 5 10 23 }
[ sum ] keep length /

But this pattern of doing two things in sequence to the same item is common enough that bi is handy:

{ 3 4 5 10 23 }
[ sum ] [ length ] bi /