配列内の重複を取り除く
p %w[a a bb a aa c bbb].uniq #複雑なだけ? h = {} uniq = [] %w[a a bb a aa c bbb].each {|x| uniq << x unless h[x]; h[x] = 1 } p uniq
p %w[a a bb a aa c bbb].uniq #複雑なだけ? h = {} uniq = [] %w[a a bb a aa c bbb].each {|x| uniq << x unless h[x]; h[x] = 1 } p uniq