tonytonyjan

module AutoLoader
  def self.included(mod)
    caller_path, = caller(1..1).first.partition(':')
    pattern = "#{File.dirname(caller_path)}/#{File.basename(caller_path, '.rb')}/*.rb"
    Dir.glob(pattern).each do |path|
      class_name = ::Utils.classify(File.basename(path, '.rb')).to_sym
      mod.autoload class_name, path
    end
  end
end

tonytonyjan

require 'benchmark'

n = 100000000

Benchmark.bmbm do |x|
  x.report('[4, 5].max') { n.times { [4, 5].max } }
  a, b = 4, 5
  x.report('[a, b].max') { n.times { [a, b].max } }
end

tonytonyjan

#!/bin/sh
# $ dasherize Hello, world! I am tonytonyjan.
printf "$*" \
  | tr '[:upper:]' '[:lower:]' \
  | tr -C '[:alnum:]' ' ' \
  | tr -s ' ' '-' \
  | sed -e 's/^-*//' -e 's/-*$//' \
  | tr -d '\n'

tonytonyjan

# conversation: https://github.com/rack/rack/commit/734a00c5f4bb46e9a5e6e2677d89a2f285dcc185
#
# user     system      total        real
# reverse:   0.010000   0.010000   0.020000 (  0.024657)
# join:      0.050000   0.010000   0.060000 (  0.056571)
# regexp:    0.050000   0.000000   0.050000 (  0.048339)

require 'benchmark'

def join(session_data)

tonytonyjan

Usage

gem install 'rack-protection'
ruby server.rb

There's a page with 2 forms, the one without CSRF token field will get 403 Forbidden response.

Note

tonytonyjan

class Interactor
  attr_reader :error

  def self.perform(*args)
    new(*args).tap { |interactor| catch(:fail) { interactor.perform } }
  end

  def success?
    @error.nil?
  end

tonytonyjan

See demo

tonytonyjan

require 'socket'

class Client
  def initialize server, socket
    @server, @socket = server, socket
    start
  end

  def send message
    @socket.puts message

tonytonyjan

require 'cgi'
require 'json'
require 'active_support'

def verify_and_decrypt_session_cookie(cookie, secret_key_base)
  cookie = CGI::unescape(cookie)
  salt         = 'encrypted cookie'
  signed_salt  = 'signed encrypted cookie'
  key_generator = ActiveSupport::KeyGenerator.new(secret_key_base, iterations: 1000)
  secret = key_generator.generate_key(salt)

tonytonyjan

n = ARGV.first.to_i
fact = Hash.new(0)
while match_data = /^(.{2,}?)\1+$/.match('.'*n)
  fact[match_data[1].length] += 1
  n /= match_data[1].length
end
fact[n] += 1
puts fact.sort.map!{|k,v| "#{k}#{"**#{v}" if v > 1}"}.join(' * ')