ruby/house (init)
ruby/house (#1)
ruby/house (#2) small reordering
ruby/roman-numerals (init)
ruby/roman-numerals (#1)
ruby/roman-numerals (#2) more abstraction
ruby/clock (init)
ruby/clock (#1)
ruby/prime-factors (init)
ruby/prime-factors (#1)
ruby/strain (init)
ruby/strain (#1)
ruby/triangle (init)
ruby/triangle (#1)
ruby/beer-song (init)
ruby/beer-song (#1)
ruby/beer-song (#2) remove some duplication
ruby/beer-song (#3) remove more duplications