havenwood

COUNTRY_LETTERS = 'A'.upto('Z').with_index(127462).to_h.freeze

def country_emoji(iso)
  COUNTRY_LETTERS.values_at(*iso.chars).pack('U*')
end

country_emoji('GB')
#=> "🇬🇧"

havenwood

string = 'numbers: one two three # en fin'

caption = string[/\A\w*/]
content = string[/(?<=:).*(?=#)/].split

caption
#=> "numbers"
content
#=> ["one", "two", "three"]

havenwood

require_relative 'tuple_space'

class Cache
  def initialize
    @memory = TupleSpace.new(reaper_period_in_secs: 10, expires_in_secs: 60)
  end

  def get(request)
    @memory[request]
  end

havenwood

class Xco
  attr_accessor :reaper

  def initialize
    @reaper = Automaton.new self
    @reaper.start
  end

  class Automaton
    def initialize(source, function: :reap, interval: 1)

havenwood

module IterateString
  refine String do
    def iterate(count, &block)
      Enumerator.produce(self, &block).first(count)
    end
  end
end

using IterateString

havenwood

# frozen_string_literal: true

require 'irb/completion'
require 'irb/ext/save-history'

IRB.conf[:SAVE_HISTORY] = 1_000_000
IRB.conf[:PROMPT_MODE] = :SIMPLE

havenwood

class MultipleInstancesOfState
  attr_accessor :state

  def initialize(state:)
    @state = state
  end

  def foo
    @state.reverse!
  end

havenwood

git clone --depth 1 --single-branch --branch guild https://github.com/ko1/ruby.git ruby-isolates-src
cd ruby-isolates-src
autoconf
./configure --prefix=$HOME/.rubies/ruby-guilds # chruby
# ./configure --prefix=$HOME/.rvm/rubies/ruby-guilds # RVM
# ./configure --prefix=$HOME/.rbenv/versions/3.0.0/ruby-guilds # rbenv
make -j2
make install

havenwood

require 'time'

module FixStrptime
  refine Time.singleton_class do
    def strptime(date, format, now=self.now)
      d = Date._strptime(date, format)
      raise ArgumentError, "invalid date or strptime format - `#{date}' `#{format}'" unless d
      if seconds = d[:seconds]
        if sec_fraction = d[:sec_fraction]
          usec = sec_fraction * 1000000

havenwood

# frozen_string_literal: true

require 'benchmark/ips'

Benchmark.ips do |ips|
  words = [*'a'..'all'].freeze
  separator = '-'

  ips.report('map & join') { words.map { |word| separator + word }.join }
  ips.report('join & prepend') { words.join(separator).prepend(separator) }