{"id":1494,"date":"2015-05-28T06:00:06","date_gmt":"2015-05-28T04:00:06","guid":{"rendered":"http:\/\/www.glc.us.es\/~jalonso\/exercitium\/?p=1494"},"modified":"2015-06-13T16:23:03","modified_gmt":"2015-06-13T14:23:03","slug":"refinamiento-de-monticulos","status":"publish","type":"post","link":"https:\/\/www.glc.us.es\/~jalonso\/exercitium\/refinamiento-de-monticulos\/","title":{"rendered":"Refinamiento de mont\u00edculos"},"content":{"rendered":"<p>Definir la funci\u00f3n<\/p>\n<pre lang=\"text\">\n   refina :: Ord a => Monticulo a -> [a -> Bool] -> Monticulo a \n<\/pre>\n<p>tal que (refina m ps) es el mont\u00edculo formado por los elementos del mont\u00edculo m que cumplen todos los predicados de la lista ps. Por ejemplo,<\/p>\n<pre lang=\"text\">\n   ghci> refina (foldr inserta vacio [1..22]) [(<7), even]\n   M 2 1 (M 4 1 (M 6 1 Vacio Vacio) Vacio) Vacio\n   ghci> refina (foldr inserta vacio [1..22]) [(<1), even]\n   Vacio\n<\/pre>\n<h4>Soluciones<\/h4>\n<pre lang=\"haskell\">\nrefina :: Ord a => Monticulo a -> [a-> Bool] -> Monticulo a \nrefina m ps | esVacio m   = vacio\n            | cumple x ps = inserta x (refina r ps)\n            | otherwise   = refina r ps\n            where x = menor m\n                  r = resto m\n\n-- (cumple x ps) se verifica si x cumple todos los predicados de ps. Por\n-- ejemplo,  \n--    cumple 2 [(<7), even]  ==  True\n--    cumple 3 [(<7), even]  ==  False\n--    cumple 8 [(<7), even]  ==  False\ncumple :: a -> [a -> Bool] -> Bool\ncumple x ps = and [p x | p <- ps]\n\n-- La funci\u00f3n cumple se puede definir por recursi\u00f3n:\ncumple2 x []     = True\ncumple2 x (p:ps) = p x &#038;&#038; cumple x ps\n<\/pre>\n","protected":false},"excerpt":{"rendered":"<p>Definir la funci\u00f3n refina :: Ord a => Monticulo a -> [a -> Bool] -> Monticulo a tal que (refina m ps) es el mont\u00edculo formado por los elementos del mont\u00edculo m que cumplen todos los predicados de la lista ps. Por ejemplo, ghci> refina (foldr inserta vacio [1..22]) [( refina (foldr inserta vacio [1..22])&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"jetpack_post_was_ever_published":false,"_kad_post_transparent":"","_kad_post_title":"","_kad_post_layout":"","_kad_post_sidebar_id":"","_kad_post_content_style":"","_kad_post_vertical_padding":"","_kad_post_feature":"","_kad_post_feature_position":"","_kad_post_header":false,"_kad_post_footer":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"footnotes":"","_jetpack_memberships_contains_paid_content":false},"categories":[5],"tags":[],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/www.glc.us.es\/~jalonso\/exercitium\/wp-json\/wp\/v2\/posts\/1494"}],"collection":[{"href":"https:\/\/www.glc.us.es\/~jalonso\/exercitium\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.glc.us.es\/~jalonso\/exercitium\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.glc.us.es\/~jalonso\/exercitium\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.glc.us.es\/~jalonso\/exercitium\/wp-json\/wp\/v2\/comments?post=1494"}],"version-history":[{"count":2,"href":"https:\/\/www.glc.us.es\/~jalonso\/exercitium\/wp-json\/wp\/v2\/posts\/1494\/revisions"}],"predecessor-version":[{"id":1560,"href":"https:\/\/www.glc.us.es\/~jalonso\/exercitium\/wp-json\/wp\/v2\/posts\/1494\/revisions\/1560"}],"wp:attachment":[{"href":"https:\/\/www.glc.us.es\/~jalonso\/exercitium\/wp-json\/wp\/v2\/media?parent=1494"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.glc.us.es\/~jalonso\/exercitium\/wp-json\/wp\/v2\/categories?post=1494"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.glc.us.es\/~jalonso\/exercitium\/wp-json\/wp\/v2\/tags?post=1494"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}