grab Ruby Objects by object_id
Are you ever frustrated that you cannot just grab objects in the console to see what the hell they are and what methods you can call on them?
2.2.3 :001 > ArticlesController
#<ActiveSupport::Callbacks::Callback:0x007fdb1e58a010>
70289541845000
#<ActiveSupport::Callbacks::Callback:0x007fdb1e3104d8>
70289540547180
#<ActiveSupport::Callbacks::Callback:0x007fdb1ed30058>
70289545855020
#<ActiveSupport::Callbacks::Callback:0x007fdb1e30b708>
70289540537220
=> ArticlesController
2.2.3 :002 > ObjectSpace._id2ref(70289541845000)