vidarh

def tick args
  args.outputs.background_color = [0,0,0]
  args.outputs.labels << {x: 20, y: 700, text: "Landscape Test", r: 255, g: 255, b: 255 }

  args.pixel_array(:col).width = 1
  args.pixel_array(:col).height = 200
  px = args.pixel_array(:col).pixels
  200.times do |y|
    y = y.abs.floor & 0xff
    col = y << 8

vidarh

module StateMachine
  def self.included(base) = base.extend(ClassMethods)

  def transition_to(to)
    before = self.class.do_before_transition(state)
    send(before) if before
    return @state = to
  end
        

vidarh

For context, you probably want to look at this HN comment[1], and the chain leading up to it from [2], as well as the followup [3]

[1] https://news.ycombinator.com/item?id=38877833 [2] https://news.ycombinator.com/item?id=38862446 [3] https://news.ycombinator.com/item?id=38878014

Basically, it's an exploration in trying and repeatedly failing understand k, and eventually figuring out roughly how to translate this:

vidarh

# See https://cachemon.github.io/SIEVE-website/blog/2023/12/17/sieve-is-simpler-than-lru/
# for a description and the Python version
# *LARGELY UNTESTED*

Node = Struct.new(:value, :visited, :prev, :next)
    
class SieveCache
  def initialize(capacity)
    @capacity = capacity
    @cache = {}

vidarh

# Based on TinyWM by Nick Welch

require 'X11'

dpy = X11::Display.new
root = dpy.screens.first.root

# OK, so pure-x11 *really* badly needs built in keysym lookup,
# but I don't want to add that without doing it properly, so this

vidarh

dir-commands

Pick and optionally run relevant commands for a directory

Vidar Hokstad vidar@hokstad.com, 2023. Licensed under the MIT license.

With no options dir-commands looks for Makefile, Rakefile, Gemfile, package.json, .git etc. in

vidarh

require 'strscan'
class Sexp
  def initialize(str); @s = StringScanner.new(str); end
  def s(e); @s.scan(e); end
  def r(e); s(e) or raise "Expected #{x}"; end
  def list; s("(")&&b=body and r(")") and b; end
  def exp; s(/[a-zA-Z][\w_-]*/)&.to_sym||s(/[0-9]+/)&.to_i||s(/"[^"]*"/)&.[](1..-2)||list||r("exp"); end
  def body; r=[]; while s(/\s*/) and !@s.eos? and !@s.check(")") and e=exp; r<<e; end; r; end
end
def sexp str; Sexp.new(str).body; end

vidarh

#
# # Theme loader
#
# Tries to load different types of themes
#

require 'nokogiri'

module ThemeLoader
  include Rouge::Token::Tokens

vidarh

# Click the Run game! button to execute the code.

def vector_add(v1,v2)
  v1.zip(v2).map{|p1,p2| p1+p2}
end

# For demonstration purposes, we just blanket apply a terminal velocity.
# Set this low to see the effect.
def resistance(v, gravity)
  # This only applies air resistance downwards, which is lazy

vidarh

require 'pp'

Oper = Struct.new(:pri,:sym,:type)

class TreeOutput
  def initialize
    @vstack = []
  end

  def oper o