Post traduzido: "24 dias de Hackage, 2015 - dia 6 - Encontrando utilitários com Hoogle e Hayoo: MissingH, extra" http://blog.haskellbr.com/2015/12/13/24-dias-de-hackage-2015-dia-6-encontrando-utilitarios-com-hoogle-e-hayoo-missingh-extra.html Yamada