a ruby koan
(Courtesy of CZ.)
There once was an old man who was observing a particular pot. His student approached and said “master, why do you stare at the pot?” The old man responded:
ArgumentError: wrong number of arguments (0 for 1) from /usr/lib/ruby/gems/1.8/gems/activesupport-2.1.0/lib/active_support/core_ext/blank.rb:13:in empty?' from /usr/lib/ruby/gems/1.8/gems/activesupport-2.1.0/lib/active_support/core_ext/blank.rb:13:in blank?' from /usr/lib/ruby/gems/1.8/gems/activerecord-2.1.0/lib/active_record/associations/association_proxy.rb:177:in send' from /usr/lib/ruby/gems/1.8/gems/activerecord-2.1.0/lib/active_record/associations/association_proxy.rb:177:in method_missing' from /usr/lib/ruby/gems/1.8/gems/activerecord-2.1.0/lib/active_record/validations.rb:357:in validates_each' from /usr/lib/ruby/gems/1.8/gems/activerecord-2.1.0/lib/active_record/validations.rb:355:in each' from /usr/lib/ruby/gems/1.8/gems/activerecord-2.1.0/lib/active_record/validations.rb:355:in validates_each' from /usr/lib/ruby/gems/1.8/gems/activesupport-2.1.0/lib/active_support/callbacks.rb:177:in call' from /usr/lib/ruby/gems/1.8/gems/activesupport-2.1.0/lib/active_support/callbacks.rb:177:in evaluate_method' from /usr/lib/ruby/gems/1.8/gems/activesupport-2.1.0/lib/active_support/callbacks.rb:161:in call' from /usr/lib/ruby/gems/1.8/gems/activesupport-2.1.0/lib/active_support/callbacks.rb:90:in run' from /usr/lib/ruby/gems/1.8/gems/activesupport-2.1.0/lib/active_support/callbacks.rb:90:in each' from /usr/lib/ruby/gems/1.8/gems/activesupport-2.1.0/lib/active_support/callbacks.rb:90:in send' from /usr/lib/ruby/gems/1.8/gems/activesupport-2.1.0/lib/active_support/callbacks.rb:90:in run'