For the curious, there is an official YouTube channel with the previous editions https://www.youtube.com/@racketlang/playlists (It usually take a few months until the videos are edited and uploaded.)
I've been messing around with a language that I summarize as:
ALOE = Scheme + Smalltalk + Types
https://github.com/dharmatech/2026-09-02-aloe-racket
Prototype is in Racket.
Cool project, thank you for sharing. I've been thinking about something similar lately.
However. "Send, not apply" - sigh.. how shall I put it.. let's try this - eyes_rolling_so_hard_they_fall_out_of_sockets.png
you lost me at the receiver selector order.
It's a common way to implement OO in Lisp-y languages, and it fits if you're taking Smalltalk as an inspiration. SICP has an example in chapter 3 (IIRC) of doing the same, but the selector had to be quoted as in:
(my-account 'balance)
(my-account 'withdraw 10)Uses an internal lambda for dispatching on messages.
We can also create objects that handle deposits as well as withdrawals, and thus we can represent simple bank accounts. Here is a procedure that returns a “bank-account object” with a specified initial balance:
(define (make-account balance)
(define (withdraw amount)
(if (>= balance amount)
(begin (set! balance
(- balance amount))
balance)
"Insufficient funds"))
(define (deposit amount)
(set! balance (+ balance amount))
balance)
(define (dispatch m)
(cond ((eq? m 'withdraw) withdraw)
((eq? m 'deposit) deposit)
(else (error "Unknown request:
MAKE-ACCOUNT" m))))
dispatch)
3.1.1 Local State Variables
https://sarabander.github.io/sicp/html/3_002e1.xhtml#g_t3_00...
A closure, specifically, because closures are a poor man's object.
quite elegant, feels like a great balance idiomatic scheme and OO
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