Fun with MacRuby

gistfile1.txt

irb(main):004:0> Module.new do
irb(main):005:1>   define_method :foo do
irb(main):006:2>     2
irb(main):007:1>   end
irb(main):008:0> end
ArgumentError: wrong number of arguments (1 for 0)

irb(main):009:0> Module.new do
irb(main):010:1>   define_method do
irb(main):011:2>     2
irb(main):012:1>   end
irb(main):013:0> end
ArgumentError: wrong number of arguments (0 for 1)