drbrain

$ ruby not_frozen.rb                
400600

# The string "a" is embedded inside the String object which is 40 bytes
#
# So 400600/40 = ~10,015 string objects
#
# (IIRC, up to 24 bytes of string may be embedded in the String)

$ ruby frozen.rb 

drbrain

$ ruby -v t.rb
ruby 2.6.5p114 (2019-10-01 revision 67812) [x86_64-darwin19]
Warming up --------------------------------------
             if else   186.397k i/100ms
case with comparison   149.445k i/100ms
      case all range   127.260k i/100ms
     case hash cheat   190.074k i/100ms
Calculating -------------------------------------
             if else      3.447M (± 7.5%) i/s -     17.149M in   5.007151s
case with comparison      2.388M (±18.2%) i/s -     11.657M in   5.065894s

drbrain

#!/usr/bin/env ruby

##
# Use this tool to extract X509 certificates from an HTTP server you want to
# connect to that is using a self-signed certificate.  This is a
# Trust-on-First-Use operation so you are still at risk of various attacks
# including man-in-the-middle.
#
# This does allow you to uniformly use VERIFY_PEER across all HTTPS
# connections, as you now will be verifying the possibly-suspect connection

drbrain

Warming up --------------------------------------
               range    60.821k i/100ms
                args    63.056k i/100ms
Calculating -------------------------------------
               range    774.236k (± 7.5%) i/s -      3.893M in   5.057747s
                args    797.590k (± 6.0%) i/s -      3.973M in   5.000220s
Warming up --------------------------------------
               range    64.468k i/100ms
                args    65.528k i/100ms
Calculating -------------------------------------

drbrain

module A
  module B
    puts "module B inside module A nesting: #{Module.nesting}"

    module_function

    def show_nesting
      puts "show_nesting nesting: #{Module.nesting}"
    end

drbrain

def color(i)
  color = 16 + (i * 13) % 216

  "\e[38;5;#{color}m"
end

5.times { puts }

zalgo = "Z̤̯̤͈̲̠͋͟A̷̞͌̍̆̓L̺̙͖G̜̣̱̃̍́ͮO̤͙̫͔̔́̏͐̇͡!̷͙͉͖̋ͩ̓̇̿"

drbrain

class A
  def m(&block)
    #return enum_for __method__ unless block_given?
    # The above calls the B implementation of #m so instead we have to create
    # our own Enumerator that's bound to this class' method so we can run the
    # with-block version of this method
    unless block_given? then
      enum = Enumerator.new do |yielder|
        method = A.instance_method(__method__).bind self

drbrain

$ ruby -v t.rb
ruby 2.4.2p198 (2017-09-14 revision 59899) [x86_64-darwin17]
Lookup
Warming up --------------------------------------
Symbol Hash, Symbol Key
                       259.197k i/100ms
String Hash, String Key
                       231.953k i/100ms
Symbol Hash, String Key
                       203.959k i/100ms

drbrain

#!/usr/bin/env bash
set -e
[ -n "$DEBUG" ] && set -x

banner()  { printf -- "-----> $*\n"; }

banner "Restarting VMware networking"

banner "Stopping networking"
sudo /Applications/VMware\ Fusion.app/Contents/Library/vmnet-cli --stop

drbrain

require 'rake/tasklib'
require 'rake/clean'

##
# Creates a cross-compiled library that mruby-cli can use to link with
# each cross-built command.
#
#   CrossLibrary.new "curl" do |cross|
#     cross.release_name = "curl-7.28.0"
#     cross.url = "https://curl.example/download/#{cross.release}.tar.gz"