Hey all,
I've been somewhat bothered by the fragmentation in a certain aspect of
Scheme / Lisp: notably that there isn't really something akin to Rust's
Iterator trait in Scheme, and as a result working across various
collections and data types is a pain.
So I introduce to you - Transducers! These are very similar to Clojure's
transducers, but add one more parameter: a fold procedure. I was unhappy
with SRFI-158 (Generators & Accumulators) and also unhappy with SRFI-171
(mostly because of how sparse the API is).
test-new-egg passes with the following release-info:
<https://gitlab.com/ThatGeoGuy/chicken-transducers/-/raw/main/transducers.release-info>
I've already added extensive documentation to the wiki page:
<https://wiki.call-cc.org/eggref/5/transducers>
And I've written a short blog post outlining some of my frustrations
that led me to writing this egg:
<https://www.thatgeoguy.ca/blog/2023/01/04/reflections-on-transducers/>
Happy to engage with the rest of the community on what the next priority
for such a library should be. My hope is that this library helps us all
move away from XXX-map and XXX-filter procedures for each individual type.
First things first: I'll probably keep trying to add more common data
type support (SRFI 146 mappings and SRFI 69 hash-tables come to mind) as
I can. Let me know if you find this useful!
Cheers,
--
Jeremy Steward
