{"id":2647,"date":"2016-12-02T06:00:53","date_gmt":"2016-12-02T04:00:53","guid":{"rendered":"http:\/\/www.glc.us.es\/~jalonso\/exercitium\/?p=2647"},"modified":"2016-12-09T10:18:23","modified_gmt":"2016-12-09T08:18:23","slug":"listas-alternadas","status":"publish","type":"post","link":"https:\/\/www.glc.us.es\/~jalonso\/exercitium\/listas-alternadas\/","title":{"rendered":"Listas alternadas"},"content":{"rendered":"<p>Una lista de n\u00fameros enteros se llama <strong>alternada<\/strong> si sus elementos son alternativamente par\/impar o impar\/par.<\/p>\n<p>Definir la funci\u00f3n<\/p>\n<pre lang=\"text\">\n   alternada :: [Int] -> Bool\n<\/pre>\n<p>tal que (alternada xs) se verifica si xs es una lista alternada. Por ejemplo,<\/p>\n<pre lang=\"text\">\n   alternada [1,2,3]     == True\n   alternada [1,4,6,5]   == False\n   alternada [1,4,3,5]   == False\n   alternada [8,1,2,3,4] == True\n   alternada [8,1,2,3]   == True\n   alternada [8]         == True\n   alternada [7]         == True\n<\/pre>\n<h4>Soluciones<\/h4>\n<pre lang=\"haskell\">\n-- 1\u00aa soluci\u00f3n:\nalternada1 :: [Int] -> Bool\nalternada1 (x:y:xs)\n  | even x    = odd y  && alternada1 (y:xs)\n  | otherwise = even y && alternada1 (y:xs)\nalternada1 _ = True\n\n-- 2\u00aa soluci\u00f3n\nalternada2 :: [Int] -> Bool\nalternada2 xs = all odd (zipWith (+) xs (tail xs))\n<\/pre>\n","protected":false},"excerpt":{"rendered":"<p>Una lista de n\u00fameros enteros se llama alternada si sus elementos son alternativamente par\/impar o impar\/par. Definir la funci\u00f3n alternada :: [Int] -> Bool tal que (alternada xs) se verifica si xs es una lista alternada. Por ejemplo, alternada [1,2,3] == True alternada [1,4,6,5] == False alternada [1,4,3,5] == False alternada [8,1,2,3,4] == True alternada&#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":[41,91,92,11,6,45,76],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/www.glc.us.es\/~jalonso\/exercitium\/wp-json\/wp\/v2\/posts\/2647"}],"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=2647"}],"version-history":[{"count":4,"href":"https:\/\/www.glc.us.es\/~jalonso\/exercitium\/wp-json\/wp\/v2\/posts\/2647\/revisions"}],"predecessor-version":[{"id":2682,"href":"https:\/\/www.glc.us.es\/~jalonso\/exercitium\/wp-json\/wp\/v2\/posts\/2647\/revisions\/2682"}],"wp:attachment":[{"href":"https:\/\/www.glc.us.es\/~jalonso\/exercitium\/wp-json\/wp\/v2\/media?parent=2647"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.glc.us.es\/~jalonso\/exercitium\/wp-json\/wp\/v2\/categories?post=2647"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.glc.us.es\/~jalonso\/exercitium\/wp-json\/wp\/v2\/tags?post=2647"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}