{"id":6,"date":"2012-09-19T01:36:51","date_gmt":"2012-09-19T04:36:51","guid":{"rendered":"http:\/\/labs.decaedro.net\/?p=6"},"modified":"2012-09-19T01:37:04","modified_gmt":"2012-09-19T04:37:04","slug":"logical-not","status":"publish","type":"post","link":"https:\/\/labs.decaedro.net\/?p=6","title":{"rendered":"Logical NOT"},"content":{"rendered":"<p>Ap\u00f3s ver o v\u00eddeo Wat (<a href=\"http:\/\/www.youtube.com\/watch?v=kXEgk1Hdze0\" target=\"_blank\">http:\/\/www.youtube.com\/watch?<wbr>v=kXEgk1Hdze0<\/wbr><\/a>) resolvi montar este post para demonstrar mais casos similares. O Operador &#8220;!&#8221; \u00e9 uma \u00f3tima op\u00e7\u00e3o.<\/p>\n<p>O operador &#8220;!&#8221; tem sempre prefer\u00eancia, sendo assim, qualquer checagem utilizando-o ser\u00e1 efetuado primeiro.<\/p>\n<p>Segue um exemplo de uso do operador &#8220;<a href=\"http:\/\/help.adobe.com\/en_US\/FlashPlatform\/reference\/actionscript\/3\/operators.html#logical_NOT\">logical NOT<\/a>&#8221; indevido.<\/p>\n<pre>import flash.display.MovieClip;\r\nimport flash.display.Sprite;\r\n\r\nvar teste:*;\r\n\r\nteste = new MovieClip();\r\n\/\/ O operador ! tem prefer\u00eancia\r\nif(!teste is Sprite){\r\n\ttrace('Teste Certo');\r\n}else{\r\n\ttrace('Teste Errado');\r\n}\r\n\r\nteste = new Sprite();\r\n\/\/ Os par\u00eanteses garantem o funcionamento correto\r\nif(! ( teste is MovieClip ) ){\r\n\ttrace('Teste Certo');\r\n}else{\r\n\ttrace('Teste Errado');\r\n}<\/pre>\n<p>Por mais que o primeiro exemplo pare\u00e7a certo, ele primeiro ir\u00e1 checar !teste e ent\u00e3o testar\u00e1 o resultado disto (um booleano) com o operador &#8216;is&#8217;, resultando erroneamente.<\/p>\n<p>A melhor op\u00e7\u00e3o \u00e9 de sempre utilizar par\u00eanteses, garantindo o funcionamento correto de suas express\u00f5es.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Ap\u00f3s ver o v\u00eddeo Wat (http:\/\/www.youtube.com\/watch?v=kXEgk1Hdze0) resolvi montar este post para demonstrar mais casos similares. O Operador &#8220;!&#8221; \u00e9 uma \u00f3tima op\u00e7\u00e3o. O operador &#8220;!&#8221; tem sempre prefer\u00eancia, sendo assim, qualquer checagem utilizando-o ser\u00e1 efetuado primeiro. Segue um exemplo de &hellip; <a href=\"https:\/\/labs.decaedro.net\/?p=6\">Continue reading <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3],"tags":[],"class_list":["post-6","post","type-post","status-publish","format-standard","hentry","category-tecnologias"],"_links":{"self":[{"href":"https:\/\/labs.decaedro.net\/index.php?rest_route=\/wp\/v2\/posts\/6","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/labs.decaedro.net\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/labs.decaedro.net\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/labs.decaedro.net\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/labs.decaedro.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=6"}],"version-history":[{"count":6,"href":"https:\/\/labs.decaedro.net\/index.php?rest_route=\/wp\/v2\/posts\/6\/revisions"}],"predecessor-version":[{"id":12,"href":"https:\/\/labs.decaedro.net\/index.php?rest_route=\/wp\/v2\/posts\/6\/revisions\/12"}],"wp:attachment":[{"href":"https:\/\/labs.decaedro.net\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=6"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/labs.decaedro.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=6"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/labs.decaedro.net\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=6"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}