{"id":861,"date":"2014-12-26T06:00:24","date_gmt":"2014-12-26T04:00:24","guid":{"rendered":"http:\/\/www.glc.us.es\/~jalonso\/exercitium\/?p=861"},"modified":"2015-01-14T08:08:53","modified_gmt":"2015-01-14T06:08:53","slug":"elementos-mas-frecuentes","status":"publish","type":"post","link":"https:\/\/www.glc.us.es\/~jalonso\/exercitium\/elementos-mas-frecuentes\/","title":{"rendered":"Elementos m\u00e1s frecuentes"},"content":{"rendered":"<p>Definir la funci\u00f3n<\/p>\n<pre lang=\"text\">\n   masFrecuentes :: Ord a => Int -> [a] -> [(Int,a)]\n<\/pre>\n<p>tal que (masFrecuentes n xs) es la lista de los pares formados por los elementos de xs que aparecen m\u00e1s veces junto con el n\u00famero de veces que aparecen. Por ejemplo,<\/p>\n<pre lang=\"text\">\n   ghci> masFrecuentes 2 \"trianera\"\n   [(2,'r'),(2,'a')]\n   ghci> masFrecuentes 2 \"interdisciplinariedad\"\n   [(5,'i'),(3,'d')]\n   ghci> masFrecuentes 3 (show (product [1..10000]))\n   [(5803,'0'),(3416,'2'),(3341,'4')]\n<\/pre>\n<h4>Soluciones<\/h4>\n<pre lang=\"haskell\">\nimport Data.List (group, sort)\n\nmasFrecuentes :: Ord a => Int -> [a] -> [(Int,a)]\nmasFrecuentes n = take n . reverse . sort . cuenta . group . sort\n    where cuenta xss = [(length xs,head xs) | xs <- xss] \n<\/pre>\n","protected":false},"excerpt":{"rendered":"<p>Definir la funci\u00f3n masFrecuentes :: Ord a => Int -> [a] -> [(Int,a)] tal que (masFrecuentes n xs) es la lista de los pares formados por los elementos de xs que aparecen m\u00e1s veces junto con el n\u00famero de veces que aparecen. Por ejemplo, ghci> masFrecuentes 2 \u00abtrianera\u00bb [(2,&#8217;r&#8217;),(2,&#8217;a&#8217;)] ghci> masFrecuentes 2 \u00abinterdisciplinariedad\u00bb [(5,&#8217;i&#8217;),(3,&#8217;d&#8217;)] ghci>&#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":[8,13,32,14,47],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/www.glc.us.es\/~jalonso\/exercitium\/wp-json\/wp\/v2\/posts\/861"}],"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=861"}],"version-history":[{"count":4,"href":"https:\/\/www.glc.us.es\/~jalonso\/exercitium\/wp-json\/wp\/v2\/posts\/861\/revisions"}],"predecessor-version":[{"id":969,"href":"https:\/\/www.glc.us.es\/~jalonso\/exercitium\/wp-json\/wp\/v2\/posts\/861\/revisions\/969"}],"wp:attachment":[{"href":"https:\/\/www.glc.us.es\/~jalonso\/exercitium\/wp-json\/wp\/v2\/media?parent=861"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.glc.us.es\/~jalonso\/exercitium\/wp-json\/wp\/v2\/categories?post=861"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.glc.us.es\/~jalonso\/exercitium\/wp-json\/wp\/v2\/tags?post=861"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}