The plan: spend 6 hours learning C, then use the rest of a 24-hour challenge to build a simple 2D fluid simulation.

The plot twist: I fell asleep mid-stream. Just woke up, and we're still going with 13 hours left on the clock.

The goal is still to get particles falling, interacting, splashing, and settling into a pool—with mouse interaction if I can pull it off.

Come watch me figure it out, ask questions, or share some C advice. This is very much a learning stream, not a tutorial.

Jerison_Parra - Twitch

Hey everyone! I'm back for day 2 of learning C from K.N. King's C Programming: A Modern Approach.

Yesterday I worked through the chapter 2 exercises. I hit my first linker error (undefined reference to powf, because I forgot to link the math library) and learned Horner's rule for evaluating polynomials without pow(). Today I'm continuing through the book, doing the exercises and setting up a cleaner Makefile workflow.

If you know C, come drop some tips. If you're learning too, come learn with me. All questions are welcome.

Going live at NOW Eastern: Jerison_Parra - Twitch

Hey everyone! Today's stream is something new: I'm learning C, working through K.N. King's C Programming: A Modern Approach.

I've mostly been writing Python lately, including building my own interpreter, so this is a chance to get closer to how things work under the hood: compiling, types, memory, and all the stuff Python handles for you. I'll be reading, doing the exercises, and probably fighting the compiler a bit.

If you know C, come share your tips. If you're new to it too, come learn with me. Questions are always welcome, beginner or not.

Going live at NOW Eastern: Jerison_Parra - Twitch

Can't sleep, so I'm streaming. Tonight's plan: build Craig Reynolds' boids (the 1986 flocking algorithm behind the bats in Batman Returns) in C, rendered in the terminal.

The catch: it's literally my first day writing C. No tutorials, no copying code. Just the original 1987 paper, the C docs, and a random math video playing in the background for vibes.

Come watch me fight segfaults until sunrise, or until my birds actually flock. Whichever comes first.

🔴 LIVE NOW: Jerison_Parra - Twitch

Hey everyone! I took yesterday off because I didn't have the energy, but I'm back today.

First up is Vim Adventures, the game that teaches Vim controls by making you use them to get around. After that, I'm switching to the University of Helsinki Python course to practice classes and code organization. The interpreter series picks back up soon.

If you want to learn Vim along with me, watch me fight my muscle memory, or just hang out while I code, come through. Questions are always welcome, beginner or not.

Going live at NOW Eastern: Jerison_Parra - Twitch

Hey everyone! I'm back for day 5 of my series where I'm building Jerison_Lang, my own interpreter, live on stream. I'm porting Crafting Interpreters from Java to Python.

Yesterday on day 4, I finished identifiers and keywords, so the scanner can now tell names like myVariable apart from reserved words like if, while, and fun. I also reorganized the test suite, added tests that check the error messages the scanner prints, and trimmed out redundant test cases.

Today I'm moving into the next chapter, Representing Code. I'll set up the syntax tree classes the parser will build, then write a small printer that turns those trees back into readable text, so I can check them.

If you're into programming, learning how languages work under the hood, or just want to hang out while someone figures things out in real time, come through. Questions are always welcome, beginner or not.

Going live at NOW Eastern: Jerison_Parra - Twitch

Hey everyone! I'm back for Day 4 of building Jerison_Lang, my own interpreter.

Yesterday, I got the scanner working by following the book. It handles operators, comments, strings, numbers, identifiers, and keywords.

Today, I'm putting the book away and trying to rebuild the whole thing from scratch. I want to see how much I actually understand without relying on the book to tell me what to do next.

I'll be talking through my thought process as I go, explaining why I'm making certain decisions and working through anything that trips me up. This is more about making sure I understand what I've built than adding new features.

I'm still learning as I go, so it definitely won't be perfect. If you're into programming languages, interpreters, or just curious about how this stuff works under the hood, feel free to stop by!

Beginners are welcome, and I'm always happy to chat and answer questions as best I can.

Live now on Twitch: https://twitch.tv/Jerison_Parra

I'm streaming my journey of building my own programming language from scratch. On day 2, the scanner came together, and today I'm tackling identifiers and keywords and squashing the last failing test.

It's beginner-friendly and very much learn-as-I-go. If you like watching code get built step by step, come hang out!

📅 Monday, October 19th, around 8AM Eastern

🔗 Jerison_Parra - Twitch

 I basically don't hand-write code anymore, I direct AI and my actual job is the scaling/deploy/API side. I've started streaming the whole thing live, mostly the unglamorous part: real deploys, stuff breaking in prod, fixing it on air.

It's an open thing, drop a bug or an architecture question in chat and I'll work through it live. no script, sometimes it goes wrong, that's kind of the point.

https://www.youtube.com/@rlmsinclair/live

twitch chat codes join me with coding type "!code" then a line of code in python and it will get added https://www.twitch.tv/walkerthecoder20

Streaming now on Twitch. Working through real code, happy to explain anything or take requests from chat. twitch.tv/chovyo