No return

gistfile1.rb

ruby-1.9.2-p290 :021 > def f_in_d(dir)
ruby-1.9.2-p290 :022?>   d = Dir.new(dir)
ruby-1.9.2-p290 :023?>   audio_files = Array.new
ruby-1.9.2-p290 :024?>   d.entries.each do |f|
ruby-1.9.2-p290 :025 >       if File.directory?(f) && f != "." && f != ".."
ruby-1.9.2-p290 :026?>       audio_files.push(Dir.glob("#{dir}/#{f}/*.{mp3,flac,wav}"))
ruby-1.9.2-p290 :027?>       end
ruby-1.9.2-p290 :028?>     end
ruby-1.9.2-p290 :029?>   return audio_files
ruby-1.9.2-p290 :030?>   end
 => nil 
ruby-1.9.2-p290 :031 > f_in_d("/media/james/howling_vibes/aufnahmen/")
 => []