havenwood

module ArrayIndices
  refine Array do
    def indices(...)
      positions = []
      offset = 0

      while (position = self[offset..].index(...)&.+(offset))
        positions << position
        offset = position.succ
      end

havenwood

# frozen_string_literal: true

require 'active_model'
require 'active_support/inflector'
require 'csv'

class CSVFileModel
  class RecordNotFound < StandardError
    def message = 'Record not found.'
  end

havenwood

#/|\ ^._.^ /|\-*-shaREABle-cONStaNt_vaLUe:LITEral;🦇;fRozEN_StRING-Literal:tRUE-*-/|\ ^._.^ /|\#

FROZEN = %w[❄️]

p FROZEN.frozen?
#=> true
p FROZEN.all?(&:frozen?)
#=> true

havenwood

# frozen_string_literal: true

source 'https://rubygems.org'

gem 'trenni'

havenwood

# frozen_string_literal: true

##
# A Rack app that streams a simple HTML page.
module App
  PRETEND_TO_WAIT_FOR_IO = proc do
    sleep 2
    'Lorem ipsum dolor sit amet, consectetuer adipiscing elit.'
  end
  HEADERS = {'content-type' => 'text/html; charset=utf-8'}.freeze

havenwood

class Class
  def new(...)
    warn 'Overriding Class#new'

    instance = allocate
    instance.send(:initialize, ...)
    instance
  end
end

havenwood

# frozen_string_literal: true

module Kernel
  def Binary(string, exception: true)
    hex = string.b
    hex.gsub!(/#[^#]*$\R*/, '')
    hex.gsub!(/"[^"]*"/) do |quotes|
      quotes[1..-2].unpack1('H*')
    end
    hex.delete!("\s\t")

havenwood

# frozen_string_literal: true

class RingBuffer
  Nothing = Data.define
  EMPTY = Nothing.new
  
  attr_reader :size
  
  def initialize(capacity:)
    @capacity = capacity

havenwood

# frozen_string_literal: true

require 'curses'
require 'singleton'

module Isene
  class ColorRegistry
    include Singleton

    attr_reader :colors

havenwood

require 'zlib'

path = 'example.rb'

##
# Compile and cache Ruby binary to disk.
binary = RubyVM::InstructionSequence.compile_file(path).to_binary
binary_path = "#{path}.yarb.gz"
Zlib::GzipWriter.open(binary_path) do
  _1.write(binary)