Fun with blocks!

gistfile1.builder

class FunWithBlocks

  attr_accessor :block

  def test_helper
    puts 'I am a really useful helper'
  end

  def run_block
    instance_exec('arg!', &@block)
  end

end

def foo
  puts 'Yay!!'
  test_helper
end

fun_block = Proc.new do |arg|
  puts arg
  test_helper
  foo
end

fun = FunWithBlocks.new
fun.block = fun_block
fun.run_block

# OUTPUT
# arg!
# I am a really useful helper
# Yay!!
# I am a really useful helper