gistfile1.txt

def add_n(n)
  Proc.new {|x| x + n }
end

add_5 = add_n(5)
add_5.call(1)
add_5.call(7)

add_10 = add_n(10)
add_10.call(add_5.call(4))

def accumulator
  start = 0
  Proc.new { start += 1 }
end

acc1 = accumulator
acc1.call()
acc1.call()
acc1.call

acc2 = accumulator
acc2.call()
acc1.call()
acc2.call()