I was working yesterday on trying to root out the bug in Phoo’s online shell; but I never found it.

Currently Phoo works-ish; except that in the online shell, the error behavior is backwards:

• Case A: When you give a bad input (that would crash), it prints no error …

Today I did a little more work on my programming language TEHSSL. And in testing it, I discovered some anomalies.

The first one is that – because of a typo on my part – testing TEHSSL will occasionally segfault when it tries to print the type of the “next” object after freeing …

I started writing a new programming language, TEHSSL, a few days ago. Starting from scratch (again!) wasn’t easy, and I’m nowhere near done yet. I have got two things working so far: the garbage collector, and the tokenizer. I have no idea how to handle the glue in …

Immediately after I wrote the last post I stumbled upon the Cognate programming language. It is sort of a weird cross between Forth, Lisp, and Tcl, all at once, and I strangely like it. Currently Cognate is only implemented by a Cognate-to-C transpiler, so I won’t be able to …

Again I find myself scratching my head over a simple scripting language. Yisp (my attempt at re-writing David Johnson-Davies’ uLisp) got way too complicated; tinyTcl (my attempt a re-writing Serge Zaitsev’s ParTcl) leaked memory like a sieve; and MicroPython can’t be extended with custom functions. All I want …

C headers are annoying. I was getting fed up with uLisp and so I decided to run another Google search for “embeddable scripting language for Arduino”.

It turned up mruby-arduino – poorly documented, and a little too big for my needs.

It turned up eLua – which unfortunately is just a flashable …

Today I decided I would have a little fun with Lisp. I wanted to try and make a program that you can type in a function and get a graph of it.

I started off with a function that takes an $x$-value and a list of coefficients, and evaluates …

For a while I have been trying to work out some bugs in David Johnson-Davies’ uLisp interpreter for Arduinos. I ported some macro and quasiquote extensions for an older version of uLisp to the current version, and apparently I did not do something right – it crashes whenever I try to …

I have finally written code that actually compiled and ran on the little ESP32 board I bought, and I hate the blasted thing already.

For starters, the process is slow, annoying, and tedious:

1. I click UPLOAD, and the Arduino IDE begins compiling by … dumping preferences.
2. It then has to shuffle …

Over the weekend I joined the conwaylife.com forums because I am interested in cellular automata. I find watching the mechanisms mesmerizing, and building them exciting.

I also have an interest in music, and so a year or two ago I tried to generate music from cellular automata. I used …