{"id":124,"date":"2023-04-15T04:44:42","date_gmt":"2023-04-15T04:44:42","guid":{"rendered":"https:\/\/canessaalvamiguel.dev\/?p=124"},"modified":"2023-04-26T18:25:12","modified_gmt":"2023-04-26T18:25:12","slug":"uniform-access-principle-in-scala","status":"publish","type":"post","link":"https:\/\/canessaalvamiguel.dev\/index.php\/2023\/04\/15\/uniform-access-principle-in-scala\/","title":{"rendered":"Uniform Access Principle in Scala"},"content":{"rendered":"\n<p>El principio de acceso uniforme establece que se debe acceder a variables y funciones sin par\u00e1metros utilizando la misma sintaxis. Scala apoya este principio al no permitir que se coloquen par\u00e9ntesis en los sitios de llamada de funciones sin par\u00e1metros.<br>Como resultado, una definici\u00f3n de funci\u00f3n sin par\u00e1metros se puede cambiar a un valor, o viceversa, sin afectar el c\u00f3digo del cliente.<\/p>\n\n\n\n<p>En el siguiente ejemplo, tenemos codigo que compila y se ejecuta sin problemas:<\/p>\n\n\n<div class=\"wp-block-syntaxhighlighter-code \"><pre class=\"brush: scala; title: ; notranslate\" title=\"\">\ndef methodA =  {\n  val a = 3\n  val b = 3\n  a + b\n}\nprintln(methodA)\n<\/pre><\/div>\n\n\n<p>aplicando el principio de acceso uniforme en Scala podemos cambiar al siguiente codigo sin afectarlo (cambio de <code>def <\/code>a <code>val <\/code>):<\/p>\n\n\n<div class=\"wp-block-syntaxhighlighter-code \"><pre class=\"brush: scala; title: ; notranslate\" title=\"\">\nval methodA = {\n  val a = 3\n  val b = 3\n  a + b\n}\nprintln(methodA)\n<\/pre><\/div>\n\n\n<p>Sin embargo por el mismo principio llamar al <code>metodoA <\/code>usando parametros generara un error:<\/p>\n\n\n<div class=\"wp-block-syntaxhighlighter-code \"><pre class=\"brush: scala; title: ; notranslate\" title=\"\">\nval methodA = {\n  val a = 3\n  val b = 3\n  a + b\n}\nprintln(methodA())\n<\/pre><\/div>\n\n<div class=\"wp-block-syntaxhighlighter-code \"><pre class=\"brush: scala; title: ; notranslate\" title=\"\">\ndef methodA = {\n  val a = 3\n  val b = 3\n  a + b\n}\nprintln(methodA())\n<\/pre><\/div>\n\n\n<figure class=\"wp-block-image alignleft size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"464\" height=\"110\" src=\"https:\/\/canessaalvamiguel.dev\/wp-content\/uploads\/2023\/04\/error-Uniform-Access-Principle.png\" alt=\"\" class=\"wp-image-161\" srcset=\"https:\/\/canessaalvamiguel.dev\/wp-content\/uploads\/2023\/04\/error-Uniform-Access-Principle.png 464w, https:\/\/canessaalvamiguel.dev\/wp-content\/uploads\/2023\/04\/error-Uniform-Access-Principle-300x71.png 300w, https:\/\/canessaalvamiguel.dev\/wp-content\/uploads\/2023\/04\/error-Uniform-Access-Principle-24x6.png 24w, https:\/\/canessaalvamiguel.dev\/wp-content\/uploads\/2023\/04\/error-Uniform-Access-Principle-36x9.png 36w, https:\/\/canessaalvamiguel.dev\/wp-content\/uploads\/2023\/04\/error-Uniform-Access-Principle-48x11.png 48w\" sizes=\"auto, (max-width: 464px) 100vw, 464px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"347\" height=\"80\" src=\"https:\/\/canessaalvamiguel.dev\/wp-content\/uploads\/2023\/04\/error-Uniform-Access-Principle2.png\" alt=\"\" class=\"wp-image-162\" srcset=\"https:\/\/canessaalvamiguel.dev\/wp-content\/uploads\/2023\/04\/error-Uniform-Access-Principle2.png 347w, https:\/\/canessaalvamiguel.dev\/wp-content\/uploads\/2023\/04\/error-Uniform-Access-Principle2-300x69.png 300w, https:\/\/canessaalvamiguel.dev\/wp-content\/uploads\/2023\/04\/error-Uniform-Access-Principle2-24x6.png 24w, https:\/\/canessaalvamiguel.dev\/wp-content\/uploads\/2023\/04\/error-Uniform-Access-Principle2-36x8.png 36w, https:\/\/canessaalvamiguel.dev\/wp-content\/uploads\/2023\/04\/error-Uniform-Access-Principle2-48x11.png 48w\" sizes=\"auto, (max-width: 347px) 100vw, 347px\" \/><\/figure>\n","protected":false},"excerpt":{"rendered":"<p>El principio de acceso uniforme establece que se debe acceder a variables y funciones sin par\u00e1metros utilizando la<\/p>\n","protected":false},"author":1,"featured_media":62,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3],"tags":[8,25],"class_list":["post-124","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-scala","tag-scala","tag-uniform-access-principle"],"_links":{"self":[{"href":"https:\/\/canessaalvamiguel.dev\/index.php\/wp-json\/wp\/v2\/posts\/124","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/canessaalvamiguel.dev\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/canessaalvamiguel.dev\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/canessaalvamiguel.dev\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/canessaalvamiguel.dev\/index.php\/wp-json\/wp\/v2\/comments?post=124"}],"version-history":[{"count":6,"href":"https:\/\/canessaalvamiguel.dev\/index.php\/wp-json\/wp\/v2\/posts\/124\/revisions"}],"predecessor-version":[{"id":164,"href":"https:\/\/canessaalvamiguel.dev\/index.php\/wp-json\/wp\/v2\/posts\/124\/revisions\/164"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/canessaalvamiguel.dev\/index.php\/wp-json\/wp\/v2\/media\/62"}],"wp:attachment":[{"href":"https:\/\/canessaalvamiguel.dev\/index.php\/wp-json\/wp\/v2\/media?parent=124"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/canessaalvamiguel.dev\/index.php\/wp-json\/wp\/v2\/categories?post=124"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/canessaalvamiguel.dev\/index.php\/wp-json\/wp\/v2\/tags?post=124"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}