fun with ruby blocks

blocks.rb

def something a, b, &block
  sum = a + b
  another_private_thing = "only something can see this"

  puts "I'm in something, executing code."
  puts "I added #{a} + #{b} and got #{sum}"
  puts "and I can access my local vars: another_private_thing = #{another_private_thing}"

  yield sum, another_private_thing

  puts "now I'm after the block"
end

puts "starting up ..."

something 1, 2 do |sum_from_something, some_var|
  puts "now I'm inside the block and have access to what something yielded to me!"
  puts "can I access another_private_thing? => no \"#{some_var}\""
end

puts "finishing up ..."