Ruby Hack Challenge

"Ruby Hack Challenge" (RHC) is a short guide to hack MRI (Matz Ruby Interpreter) internals.Periodically we hold an event "RHC" at Cookpad or other places.Matz, Koichi and Mame celebrate “Ruby Week” at Cookpad, BristolIf you want to hold a RHC event, please ask us.We provide lecture materials:(1) Introduction of MRI development culture(2) MRI source code structure(3) Exercise: Add methods to Ruby(4) Fixing bugs(5) Performance improvementsTask ideas.