Shannon Skipper havenwood

havenwood / app.rb

Created January 8, 2026 19:58

Example showing running Falcon locally from a single file (IRC question about ditching config.ru)

	#!/usr/bin/env -S falcon-host
	# frozen_string_literal: true

	require "falcon/environment/rack"
	require "roda"

	class App < Roda
	route do \|r\|
	r.root { "wombat" }
	end

havenwood / options.rb

Created January 6, 2026 22:15

An example just to demonstrate how the new `Ruby::Box` sandboxes stuff including globals

	require 'optparse'

	class Options < Ruby::Box
	class Into
	class BadKeyError < ArgumentError
	def initialize(key) = super("Bad key: #{key.inspect}")
	end

	def []=(key, value)
	global = "$#{key.to_s.delete_prefix('$').tr('-', '_')}"

havenwood / byte-size.js

Created December 31, 2025 19:50

An example custom HTML element that shows formatted byte sizes

	class ByteSize extends HTMLElement {
	static observedAttributes = ["si"];
	static #binaryUnits = ["B", "KiB", "MiB", "GiB", "TiB"];
	static #siUnits = ["B", "KB", "MB", "GB", "TB"];

	#initialized = false;
	#bytes = 0;

	get si() {
	return this.hasAttribute("si");

havenwood / options.rb

Created December 28, 2025 02:19

An example showing OptionParser backed by Data

	require 'delegate'
	require 'optparse'

	class Options < SimpleDelegator
	def initialize(argv = ARGV, &)
	parser = OptionParser.new(&)
	members = members_from parser
	values = values_from parser, argv
	data = data_from members, values

havenwood / stream_zipped_tsv.rb

Created December 11, 2025 12:55

An example showing streaming a zipped tsv via a pipe

	require 'async'
	require 'async/http/internet/instance'
	require 'csv'
	require 'zlib'

	def stream_zipped_tsv(url, &)
	Sync do
	response = Async::HTTP::Internet.get(url)

	unless response.success?

havenwood / curtain.rb

Created November 27, 2025 01:33

at_exit with priorities

	module Curtain
	@hooks = []
	@order = 0
	@mutex = Mutex.new

	class << self
	attr_reader :order

	def register(group:, priority: 0, &block)
	@mutex.synchronize do

havenwood / ruby_vm-shape.rb

Created November 15, 2025 19:38

A nicer interface to look at the Shape of a Ruby Object

	require 'json'
	require 'objspace'

	class RubyVM
	module Shape
	def self.id(obj)
	json = ObjectSpace.dump(obj, output: :string)
	JSON.parse(json).fetch('shape_id')
	end

havenwood / tags.rb

Created November 15, 2025 19:34

An example of ObjectSpace::WeakKeyMap, which was introduced in Ruby 3.3

	require 'delegate'

	class Tags < SimpleDelegator
	def initialize = super(ObjectSpace::WeakKeyMap.new)
	def tagged?(key) = key?(key)
	end

	TAGS = Tags.new

	lamb = -> {}

havenwood / literalparser.rb

Created October 29, 2025 09:40 — forked from apeiros/literalparser.rb

Parse literals to ruby objects

	require 'strscan'
	require 'bigdecimal'



	# This is copied and slightly refactored from BareTest::TabularData
	#
	# Example
	# LiteralParser.parse("nil") # => nil
	# LiteralParser.parse(":foo") # => :foo

havenwood / proc_to_lambda.rb

Last active November 5, 2025 04:50

An example showing how to convert a Proc into a lambda and vice versa with Fiddle