reinh

class MyView < Mustache
  def cache_by_user_id
    lambda do |text|
      cache_key = "user:#{current_user.id}"

      if value = $cache.get(cache_key)
        value
      else
        rendered = render(text)
        $cache.set(cache_key, rendered)

reinh

module Enumerable
  def toggle_boolean
    is_even = false
    map{|object|
      is_even = !is_even
      is_even
    }
  end
end

reinh

module Enumerable2
  def map2
    new_array = []
    each{|item| new_array << yield(item)}
    return new_array
  end
end

class Array
  include Enumerable2

reinh

class TaskList
  def initialize
    @tasks = []
  end

  def add(task)
    @tasks << task
  end
end

reinh

class TaskList
  def initialize
    @tasks = []
  end

  def add(task)
    @tasks << task
  end

  def each

reinh

class TaskList
  include Enumerable

  def initialize
    @tasks = []
  end

  def add(task)
    @tasks << task
  end

reinh

class TaskList
  include Enumerable

  def initialize
    @tasks = []
  end
end

class TaskList
  def add(task)

reinh

  def run(cmdline=ARGV)
    name, *args = cmdline
    name &&= name.to_sym

    name, *args = :main, name, *args unless COMMANDS[name]
    Commandant.call name.to_sym, args.compact
  end
  module_function :run

reinh

SELECT "drawings".* FROM "drawings"
  INNER JOIN "assignment_tag_drawings" ON ("drawings"."id" = "assignment_tag_drawings"."drawing_id")
  INNER JOIN "assignment_tags"         ON ("assignment_tags"."id" = "assignment_tag_drawings"."assignment_tag_id")
WHERE (drawings.assignment_id = 12
  AND assignment_tags.umbrella_category_id in ('29'))
GROUP BY drawings.id
  HAVING count(DISTINCT umbrella_category_id) = 1

reinh

def factorial_recursive(n)
  return 1 if n == 0 # base case
  n *= factorial(n - 1) #recursion
end

def factorial_iterative(n)
  (1..n).reduce(:*)
end