{"id":7289,"date":"2022-09-05T06:00:15","date_gmt":"2022-09-05T04:00:15","guid":{"rendered":"http:\/\/www.glc.us.es\/~jalonso\/exercitium\/?p=7289"},"modified":"2022-12-14T16:33:06","modified_gmt":"2022-12-14T14:33:06","slug":"intercambio-de-componentes-de-un-par","status":"publish","type":"post","link":"https:\/\/www.glc.us.es\/~jalonso\/exercitium\/intercambio-de-componentes-de-un-par\/","title":{"rendered":"Intercambio de componentes de un par"},"content":{"rendered":"<p>Definir la funci\u00f3n<\/p>\n<pre lang=\"text\">\n   intercambia :: (a,b) -> (b,a)\n<\/pre>\n<p>tal que <code>(intercambia p)<\/code>  es el punto obtenido intercambiando las coordenadas del punto <code>p<\/code>. Por ejemplo,<\/p>\n<pre lang=\"text\">\n   intercambia (2,5)  ==  (5,2)\n   intercambia (5,2)  ==  (2,5)\n<\/pre>\n<p><b>Soluciones<\/b><\/p>\n<p>A continuaci\u00f3n se muestran las <a href=\"#haskell\">soluciones en Haskell<\/a> y las <a href=\"#python\">soluciones en Python<\/a>.<\/p>\n<p><a name=\"haskell\"><\/a><br \/>\n<b>Soluciones en Haskell<\/b><\/p>\n<pre lang=\"haskell\">\nintercambia :: (a,b) -> (b,a)\nintercambia (x,y) = (y,x)\n<\/pre>\n<p>El c\u00f3digo se encuentra en <a href=\"https:\/\/github.com\/jaalonso\/Exercitium\/blob\/main\/src\/Intercambio_de_componentes_de_un_par.hs\">GitHub<\/a>.<\/p>\n<p><a name=\"python\"><\/a><br \/>\n<b>Soluciones en Python<\/b><\/p>\n<pre lang=\"python\">\nfrom typing import TypeVar\nfrom hypothesis import given, strategies as st\n\nA = TypeVar('A')\nB = TypeVar('B')\n\ndef intercambia(p: tuple[A, B]) -> tuple[B, A]:\n    (x, y) = p\n    return (y, x)\n\n# La propiedad de es\n@given(st.tuples(st.integers(), st.integers()))\ndef test_equiv_intercambia(p):\n    assert intercambia(intercambia(p)) == p\n\n# La comprobaci\u00f3n es\n#    src> poetry run pytest -q intercambio_de_componentes_de_un_par.py\n#    1 passed in 0.15s\n<\/pre>\n<p>El c\u00f3digo se encuentra en <a href=\"https:\/\/github.com\/jaalonso\/Exercitium-Python\/blob\/main\/src\/intercambio_de_componentes_de_un_par.py\">GitHub<\/a>.<\/p>\n<p><b>Comentarios<\/b><\/p>\n<ul>\n<li>En Haskell se pone el patr\u00f3n en los argumentos y en Python hay que extraerlos mediante un asignaci\u00f3n.<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>Definir la funci\u00f3n intercambia :: (a,b) -> (b,a) tal que (intercambia p) es el punto obtenido intercambiando las coordenadas del punto p. Por ejemplo, intercambia (2,5) == (5,2) intercambia (5,2) == (2,5) Soluciones A continuaci\u00f3n se muestran las soluciones en Haskell y las soluciones en Python. Soluciones en Haskell intercambia :: (a,b) -> (b,a) intercambia&#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":[581],"tags":[],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/www.glc.us.es\/~jalonso\/exercitium\/wp-json\/wp\/v2\/posts\/7289"}],"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=7289"}],"version-history":[{"count":5,"href":"https:\/\/www.glc.us.es\/~jalonso\/exercitium\/wp-json\/wp\/v2\/posts\/7289\/revisions"}],"predecessor-version":[{"id":7699,"href":"https:\/\/www.glc.us.es\/~jalonso\/exercitium\/wp-json\/wp\/v2\/posts\/7289\/revisions\/7699"}],"wp:attachment":[{"href":"https:\/\/www.glc.us.es\/~jalonso\/exercitium\/wp-json\/wp\/v2\/media?parent=7289"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.glc.us.es\/~jalonso\/exercitium\/wp-json\/wp\/v2\/categories?post=7289"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.glc.us.es\/~jalonso\/exercitium\/wp-json\/wp\/v2\/tags?post=7289"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}