thepug

# small recursive version
def collatzr(num,arr = [])   
  return arr if arr.unshift(num)[0] == 1
  num.even? ? collatzr(num / 2,arr) : collatzr(num * 3 + 1,arr)
end
# pretty looping version
def collatz(num,arr = [])
  while num != 1
    arr << num
    num = num.even? ? num / 2 : num * 3 + 1	  

thepug

class Image
  attr_accessor :array

  def initialize(array)
    @array = array
  end

  def blur(distance = 1)
    distance.times do
      transform

thepug

from fabric.api import env, run, sudo, local, put

def production():
    """Defines production environment"""
    env.user = "deploy"
    env.hosts = ['example.com',]
    env.base_dir = "/var/www"
    env.app_name = "app"
    env.domain_name = "app.example.com"
    env.domain_path = "%(base_dir)s/%(domain_name)s" % { 'base_dir':env.base_dir, 'domain_name':env.domain_name }