rauchy · November 20, 2012 10:27
diff --git a/block_given.rb b/block_given.rb
 def log
  if block_given?
    puts "before block"
    yield
    puts "after block"
  end
 end

 log # nothing will be displayed!
diff --git a/call_block.rb b/call_block.rb
 def log
  puts "before block"
  yield
  puts "after block"
 end

 log do
  puts "o hai"
 end
diff --git a/provide_block.rb b/provide_block.rb
 some_method(some_argument) do
  # block content goes here
 end
	def log
	if block_given?
	puts "before block"
	yield
	puts "after block"
	end
	end

	log # nothing will be displayed!