mattdesl

/**
 * A decoder for The "Quite OK Audio" (QOA) format, a lossy audio compression
 * that achieves relatively decent compression with fast decoding and not much complexity.
 *
 * Note that this has only been tested on QOA files generated by a specific commit (e8386f4)
 * of QOA, see below:
 *   https://github.com/phoboslab/qoa/tree/e8386f41d435a864ce2890e9f56d964215b40301
 *
 * If you try to decode audio files that were encoded on a different version of QOA you might
 * end up with jarring noise. This needs a companion encoder written in JS to be a little more stable.

mattdesl

/**
 * Catmull-Rom "getPoint" function taken from ThreeJS.
 */
const vec3DistSq = require("gl-vec3/squaredDistance");
const vec3Add = require("gl-vec3/add");
const vec3Sub = require("gl-vec3/subtract");

/*
 Based on an optimized c++ solution in
  - http://stackoverflow.com/questions/9489736/catmull-rom-curve-with-no-cusps-and-no-self-intersections/

mattdesl

1. Write your sketch, export to window scope
2. Build with canvas-sketch sketch.js --build --dir=dist
3. Use the .js as a vendor script in your preferred HTML/JS framework.

mattdesl

; draws a rectangle on canvas
(fn draw-rect (x y w h) (do
  (canvas/line x y (+ x w) y)
  (canvas/line (+ x w) y (+ x w) (+ y h))
  (canvas/line x (+ y h) (+ x w) (+ y h))
  (canvas/line x y x (+ y h))
))

; array utility - for-each
(fn each (arr itr)

mattdesl

(fn loop (n iter) (do
  (var i 0)
  (while (< i n) (do
    (iter i)
    (set i (+ 1 i))
  ))
))

(var colors [
  "#E84420" "#F4CD00" "#3E58E2"

mattdesl

; a function in scope
(fn square (x) (* x x))

; anon/lambda function
((fn (x) (* x x)) 3) ; 9

; variables
(var square2 4)

; let scoping

mattdesl

; a loop utility
(fn loop (n iter) (do
  (var i 0)
  (while (< i n) (do
    (iter i)
    (set i (+ 1 i))
  ))
))

(var BG 0xff)

mattdesl

Fiat-Based "Transaction Processors"

It would be interesting to see a fiat service for broadcasting Ethereum transactions to the network. Right now, most fiat on-ramps come in two flavours:

1. A centralized exchange (like Coinbase, FTX and Binance). Poor user experience, slow, questionable regulatory frameworks, lack of transparency, often turn out to be insolvent.
2. A fiat-to-token on-ramp (like Ramp.xyz and more recently Stripe). Better user experience, but limited in functionality and progammability.

I think there should be a third category: fiat-based transaction processors. Say you are an app developer and wish for your user to initiate a complex transaction flow, e.g.

call method CrowdfundContract#deposit(), but it requires a transfer of 5 USDC to the contract to succeed

mattdesl

( artwork )

|00 @System [ &vector $2 &pad $6 &r $2 &g $2 &b $2 &debug $1 &halt $1 ]
|10 @Console [ &vector $2 &read $1 &pad $5 &write $1 &error $1 ]
|20 @Screen [ &vector $2 &width $2 &height $2 &auto $1 &pad $1 &x $2 &y $2 &addr  $2 &pixel $1 &sprite $1 ]
|c0 @DateTime [ &year $2 &month $1 &day $1 &hour $1 &minute $1 &second $1 &dotw $1 &doty $2 &isdst $1 ]

|0000
  @framecount $1
  %MOD { DUP2 DIV MUL SUB } ( a b -- a%b )

mattdesl

1. Download your Twitter archive

You can find this feature in Settings > Download Twitter Archive. It might take 24 hours to receive. Unzip the file and open the data folder in your terminal:

cd ~/Downloads/twitter-archive-zip-you-downloaded/data

(I have seen reports that this function may no longer be working, so this guide is mostly useful to those who were lucky enough to already have downloaded their archive.)