keithrbennett

#!/usr/bin/env ruby

module M
  def foo
    puts 'I am a module instance method.'
  end
end

# Class whose foo instance method is defined *after* the include.
class C1

keithrbennett

#!/usr/bin/env ruby

# From solution at https://stackoverflow.com/questions/73676857/guaranteeing-that-module-includer-classes-include-another-module-in-ruby.

module M1
  def m1; puts 'M1 was included by M2.'; end
end

module M2
  def self.included(including_class)

keithrbennett

#!/usr/bin/env ruby

# Illustrates cycling through the SemanticLogger log levels with signals.
# For reference by https://github.com/reidmorrison/semantic_logger/issues/231.

require 'semantic_logger'

# Redefine add_signal_handler to output to STDERR (omit TTIN behavior for brevity):
module SemanticLogger
  def self.add_signal_handler(log_level_signal = "USR2", thread_dump_signal = "TTIN", gc_log_microseconds = 100_000)

keithrbennett

#!/usr/bin/env ruby

# Author: @keithrbennett (Github)

# Illustrates how to respond to Unix signals in a Ruby program, using SIGUSR1 and SIGUSR2
# for user-defined signals, and SIGINT for trapping Ctrl-C.

require 'awesome_print'
require 'json'
require 'yaml'

keithrbennett

#!/usr/bin/env ruby

require 'nokogiri'

def process_example(message, xml_text, use_noblanks_option)
  puts message
  puts "XML text: #{xml_text.inspect}"
  doc = Nokogiri::XML(xml_text) { |config| use_noblanks_option ? config.noblanks : config }
  puts 'Resulting XML document:'
  puts doc.inspect; puts; puts

keithrbennett

#!/usr/bin/env ruby


REPO_URLS = %w{
  https://github.com/rubyforgood/casa
  https://github.com/rubyforgood/cep-backend
  https://github.com/rubyforgood/cep-ui
  https://github.com/rubyforgood/circulate
  https://github.com/rubyforgood/human-essentials
  https://github.com/rubyforgood/shelter-assist

keithrbennett

#!/usr/bin/env ruby

module M
  class << self
    attr_accessor :foo
  end
end

class C1
  def call

keithrbennett

#!/usr/bin/env ruby

# Run in directory containing `compar.c`, e.g. from https://github.com/ruby/ruby/blob/master/compar.c.

require 'etc'

WORDS = Ractor.make_shareable File.readlines('/usr/share/dict/words').map(&:chomp).map(&:downcase).sort
TRY_COUNT = Etc.nprocessors

puts "Measuring first sequentially on main ractor and then with #{TRY_COUNT} ractors:\n\n"

keithrbennett

#!/usr/bin/env ruby

# strip-zero-width-spaces.rb
#
# Removes Unicode "\u200B" zero width spaces; useful for copying source code from O'Reilly learning books
#
# Usage:
#
# strip-zero-width-spaces.rb < original_file > new_stripped_file

keithrbennett

#!/usr/bin/env ruby

def bsearch(array, search_value)

  lower_bound = 0
  upper_bound = array.length - 1
  n = 0

  while lower_bound < upper_bound
    n += 1