Ruby筆記
以前Ruby 1.9 年代的筆記，以英語寫成。 There are notes written for Ruby 1.9.
介紹簡單datat type
Ruby basic from Ho Yin Liu
介紹Method, Regular expression, Block, Convention
Ruby basic2 from Ho Yin Liu
介紹Class, Inheritance, Module, Mixin
Ruby basic3 from Ho Yin Liu
