diff options
| author | Jan Tuomi <jan@jantuomi.fi> | 2026-01-05 21:15:44 +0200 |
|---|---|---|
| committer | Jan Tuomi <jan@jantuomi.fi> | 2026-01-05 21:39:06 +0200 |
| commit | 09e410b21358e1475261499ccf6a75fac2da12d4 (patch) | |
| tree | 26bde85dbe6be7502d1eca29263e404e92633f94 /content/posts/it-doesnt-mean-that.md | |
| parent | b2b9388f789c58a5b6ee1cbf9edfe88013d3fc63 (diff) | |
Refactor and colocate assets
Diffstat (limited to 'content/posts/it-doesnt-mean-that.md')
| -rw-r--r-- | content/posts/it-doesnt-mean-that.md | 42 |
1 files changed, 0 insertions, 42 deletions
diff --git a/content/posts/it-doesnt-mean-that.md b/content/posts/it-doesnt-mean-that.md deleted file mode 100644 index adf171f..0000000 --- a/content/posts/it-doesnt-mean-that.md +++ /dev/null @@ -1,42 +0,0 @@ ---- -title: It doesn't mean that -date: 2024-03-31 -extra: - kind: note ---- - -<img src="/files/wikimedia_monad.svg" alt="A plain circle with a small dot in the center" style="max-height: 200px; margin-bottom: 0px" /> - -## When I learned my first programming language - -I learned about functions. - -A _function_ is a thing you can call. The function might then _return_ a value. - -## Then I learned about functional programming - -And learned that those words did not mean that at all. Or at least that was not their full, universal meaning. - -Those _functions_ were actually _procedures_. Or _subroutines_. A function should be mathematical and pure. A mapping from a type to another. - -_Returning_ was not optional. All functions return, explicitly or implicitly, since function application must be assigned a value. - -I learned new words too. - -_Functors_ are containers. _Monads_ are powered-up functors with useful computational context. - -## Now that I’m learning about category theory… - -…I’m learning that those words do not mean what I thought they meant, either. - -_Functions_ are apparently morphisms, or arrows, in the category of types. _Functors_ are not containers, they are morphisms between categories. They are also their own category. - -_Monads_ are — I haven’t gotten to monads yet. - -## I read that they have a Monad in philosophy - -And it means _god_. [¹](it-doesnt-mean-that#fn1) - ---- - -1. <a href="https://en.wikipedia.org/wiki/Monad_(philosophy)" id="fn1">More or less.</a> |
