lmars

Game Of Life Rules

You have a grid of cells in 2 dimensions. Each cell has 2 possible states, alive or dead. Each cell has 8 neighbours: above, below, left, right, and the 4 diagonals.

• any life cell < 2 neighbours dies
• any life cell > 3 neighbours dies
• any live cell with 2 or 3 neighbours lives to next generation
• any dead cell with exactly 3 live neighbours becomes a live cell

lmars

NUMERALS = {
  'i' => 1,
  'v' => 5,
  'x' => 10,
  'l' => 50,
  'c' => 100,
  'd' => 500,
  'm' => 1000
}

lmars

string = 'ABCDE'

string.reverse.each_char do |numeral|
  # inside this block numeral will be a character from the string
  puts numeral
end

# This will output:
E
D

lmars

class RedirectTo
  def initialize(expected, session)
    @expected = expected
    @session  = session
  end

  def matches?(visit_proc)
    instance_eval(&visit_proc)

    @status = @session.status_code

lmars

cap() {
  bundle exec cap $@
       
  if [ $? -eq 0 ]; then
    growlnotify --image=$HOME/Pictures/success.png -m 'Success!' "cap $@"
  else
    growlnotify --image=$HOME/Pictures/failure.png -m 'Failure!' "cap $@"
  fi                                                  
}

lmars

before(:each, :capybara_feature => true)
  @cache_store = ActionController::Base.cache_store
  ActionController::Base.perform_caching = true
  ActionController::Base.cache_store = :memory_store
end

after(:each, :capybara_feature => true)
  ActionController::Base.perform_caching = false
  ActionController::Base.cache_store = @cache_store
end

lmars

#
# start of solution
#
MyString = Class.new(String)

MyString.define_singleton_method(:alphabet) { 'abc' }

MyString.class_eval {
  exclaim_method = proc { |*args|
    count = args.first || 1

lmars

require 'zipruby'
require 'csv'

csv = CSV.generate do |csv|
  csv << ['i', '2i']

  1.upto(10) do |i|
    csv << [i, i*2]
  end
end

lmars

def foo(*args)
  @memoized_foo ||= {}
  @memoized_foo[args] ||= begin
    some_expensive_method
  end
end

lmars

require 'net/http'                                                                                                                              
require 'uri'                                                                                                                                   
                                                                                                                                                
random_url = URI('http://www.random.org/integers/?num=1&min=1&max=6&col=1&base=10&format=plain&rnd=new')                                        
                                                                                                                                                
ints = []                                                                                                                                       
                                                                                                                                                
resp = Ne