Sergey Tokarenko stokarenko

## class_ancestors.rb
module A
  def func
    p 'A'
    super
  end
end

class B
  def func
    p 'B'

## array_to_hash.rb
require 'benchmark'
require 'benchmark/ips'

seed = [1,2,3]
map_proc = ->(i){ [i,i] }

Benchmark.ips do |x|
  x.report('inject') { seed.inject({}){ |mem, i| mem[i]=i; mem } }
  x.report('to_h') { seed.map(&map_proc).to_h }
  x.report('Hash[map]') { Hash[seed.map(&map_proc)] }

## capybara_chrome.rb
# spec/support/capybara_chrome.rb

require 'selenium/webdriver'
require 'capybara/rspec'
require 'capybara-screenshot/rspec'

RSpec.configure do
  Capybara.server = :puma
  Capybara.server_port = 5000

## lazy_chaining.rb
require 'benchmark'
require 'benchmark/ips'

NORMAL_ITERATIONS = 100
LONG_ITERATIONS = 2000

def map_to_self(array, iterations)
  iterations.times do
    array = array.map{ |i| i }
  end

## _while_true_vs_loop.rb
require 'benchmark'

MAX = 10**8

puts Benchmark.measure{
  a = MAX

  while(true)
    a -= 1
    break if a == 0

## bitwise_operators_in_ruby.rb
require 'benchmark'
require 'benchmark/ips'

seed = 1239012

Benchmark.ips do |x|
  x.report('bitwise multiplication by 2') { seed << 1 }
  x.report('arithmetic multiplication by 2') { seed * 2 }

  x.report('bitwise division by 2') { seed >> 1 }

## Several GitHub accounts
$ ssh-add ~/.ssh/id_rsa_some_other_github_account_name

$ git clone git@some_other_github_account_name.github.com:community/repo.git

# Add to repo/.git/config the `name` section like this
# [user]
#   name =  some_other_github_account_name
#   email = some_other_github_account_name@users.noreply.github.com