Grandfather clock exercise from "Learn to Program" by Chris Pine.

grandfather_clock.rb

# Grandfather clock. 

# Write a method that takes a block and calls it once for each hour that has passed today. 
# That way, if I were to pass in the block:
# do
#   puts 'DONG!'
# end
# it would chime (sort of) like a grandfather clock. Test your method out with a few different blocks.
# Hint: You can use Time.new.hour to get the current hour. 
# However, this returns a number between 0 and 23, so you 
# will have to alter those numbers in order to get ordinary 
# clock-face numbers (1 to 12).

# logic: find the number of hours passed, then do the block that number of times

def clockwork &block 
  current_hour = Time.new.hour
  if current_hour > 12
    current_hour = current_hour - 12
  end
  if current_hour == 0 
    current_hour = 12
  end
  current_hour.times do
    block.call  #I forgot to put this in the method the first time
  end
end

# worked:
clockwork do 
  puts "Chime!"
end

# didn't work; you can't access the method's variables within the block? would i need to create a class?
# clockwork do
#  puts "#{current_hour}"
# end