def twice
2.times { |i| yield i }
end
twice { |n| puts "step #{n}" }def twice
2.times { |i| yield i }
end
twice { |n| puts "step #{n}" }def twice
2.times { |i| yield i }
end
twice { |n| puts "step #{n}" }def twice
2.times { |i| yield i }
end
twice { |n| puts "step #{n}" }