What really baked my noodle is that there is another "end" called __END__ used like this $ cat data.rb DATA.each_line { |ln|puts ln } __END__ fish

What really baked my noodle is that there is another "end" called __END__ used like this $ cat data.rb DATA.each_line { |ln|puts ln } __END__ fish cat dog $ ruby data.rb fish cat dog