{"id":25043,"date":"2023-12-04T17:02:44","date_gmt":"2023-12-04T16:02:44","guid":{"rendered":"https:\/\/www.codemotion.com\/magazine\/?p=25043"},"modified":"2024-01-25T12:26:12","modified_gmt":"2024-01-25T11:26:12","slug":"migliorare-la-qualita-del-codice-attraverso-il-refactoring-una-guida-completa","status":"publish","type":"post","link":"https:\/\/www.codemotion.com\/magazine\/it\/frontend-it\/migliorare-la-qualita-del-codice-attraverso-il-refactoring-una-guida-completa\/","title":{"rendered":"Migliorare la qualit\u00e0 del codice attraverso il refactoring: Una guida completa"},"content":{"rendered":"\n<p>Il refactoring svolge un ruolo fondamentale nella creazione e nella manutenzione di un codice di alta qualit\u00e0. Questo processo di miglioramento graduale mira a eliminare i cosiddetti &#8220;code smells&#8221;, che sono indicatori di <strong>potenziali problemi nel design e nella struttura del codice<\/strong>. Analizziamo pi\u00f9 da vicino alcuni dei code smells pi\u00f9 comuni e le pratiche di refactoring associate.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-caratteristiche-di-un-clean-code\">Caratteristiche di un Clean Code:<\/h3>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"h-1-semplicita\">1. Semplicit\u00e0<\/h4>\n\n\n\n<p>La semplicit\u00e0 \u00e8 alla base di un codice di qualit\u00e0. Un codice semplice \u00e8 pi\u00f9 facile da leggere, comprendere e mantenere nel tempo, inoltre un design chiaro e diretto facilita la collaborazione tra membri del team e contribuisce alla manutenibilit\u00e0 complessiva del software.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"h-2-eliminazione-delle-duplicazioni\">2. Eliminazione delle duplicazioni<\/h4>\n\n\n\n<p>Le duplicazioni nel codice sono fonte di potenziali errori e complicano la manutenzione, \u00e8 necessario identificare e rimuovere il codice duplicato attraverso l&#8217;uso di funzioni o classi riutilizzabili contribuisce a rendere il codice pi\u00f9 pulito e snello.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"h-3-assenza-di-codice-superfluo\">3. Assenza di codice superfluo<\/h4>\n\n\n\n<p>Un codice efficiente evita elementi inutili o non necessari. L&#8217;eliminazione di codice superfluo non solo semplifica la comprensione ma migliora anche le prestazioni e la gestibilit\u00e0 del sistema.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"h-4-pressione-da-parte-del-business\">4. Pressione da parte del business<\/h4>\n\n\n\n<p>Il codice dovrebbe rispecchiare chiaramente le esigenze del business. Comprendere appieno i requisiti del cliente e tradurli in codice intuitivo \u00e8 essenziale per la riuscita del progetto ma la pressione che il business pu\u00f2 fare al reparto tecnico o agli sviluppatori pu\u00f2 essere la causa di un progetto con molti errori.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"h-5-gestione-consapevole-del-debito-tecnico\">5. Gestione consapevole del debito tecnico<\/h4>\n\n\n\n<p>Essere consapevoli del debito tecnico \u00e8 il primo passo per gestirlo. Il refactoring dovrebbe essere parte integrante dello sviluppo per affrontare gradualmente le aree problematiche e mantenere il codice in uno stato robusto nel tempo.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"h-6-test-e-documentazione\">6. Test e documentazione<\/h4>\n\n\n\n<p>Il codice deve essere ampiamente testato per garantire stabilit\u00e0 e affidabilit\u00e0 inoltre la documentazione chiara fornisce un contesto essenziale per comprendere e mantenere il codice nel tempo.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-principali-code-smells\">Principali &#8220;Code Smells&#8221;:<\/h3>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"h-1-metodi-lunghi\">1. Metodi lunghi<\/h4>\n\n\n\n<p>Metodi estesi possono essere difficili da leggere e comprendere tuttavia scomporre metodi lunghi in unit\u00e0 pi\u00f9 piccole migliora la leggibilit\u00e0 e facilita la manutenzione.<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-1\" data-shcb-language-name=\"JavaScript\" data-shcb-language-slug=\"javascript\"><span><code class=\"hljs language-javascript\"> double calculatePriceAndPayTaxes() {\n        double basePrice = quantity * itemPrice;\n        <span class=\"hljs-comment\">\/\/Apply discount<\/span>\n        <span class=\"hljs-keyword\">if<\/span>(user.equals(userWithPrivileges)) {\n            <span class=\"hljs-keyword\">if<\/span> (basePrice &gt; <span class=\"hljs-number\">1000<\/span>) {\n            basePrice = basePrice * <span class=\"hljs-number\">0.80<\/span>;\n            }\n            <span class=\"hljs-keyword\">else<\/span> {\n                basePrice = basePrice * <span class=\"hljs-number\">0.90<\/span>;\n            }\n        }\n\n        <span class=\"hljs-comment\">\/\/Pay taxes<\/span>\n        <span class=\"hljs-keyword\">for<\/span>(int i = <span class=\"hljs-number\">0<\/span>; i &lt; quantity; i++) {\n            <span class=\"hljs-comment\">\/\/Call provider taxes<\/span>\n            <span class=\"hljs-comment\">\/\/send payment<\/span>\n            <span class=\"hljs-comment\">\/\/it could take several code lines<\/span>\n\n            <span class=\"hljs-comment\">\/\/finish send taxes<\/span>\n            \n        }\n        <span class=\"hljs-keyword\">return<\/span> basePrice;\n      }<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-1\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">JavaScript<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">javascript<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<h4 class=\"wp-block-heading\" id=\"h-2-classi-enormi\">2. Classi enormi<\/h4>\n\n\n\n<p>Classi troppo grandi diventano complesse e difficili da gestire, al contrario la scomposizione in classi pi\u00f9 piccole con responsabilit\u00e0 specifiche migliora la modularit\u00e0 del sistema.<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-2\" data-shcb-language-name=\"PHP\" data-shcb-language-slug=\"php\"><span><code class=\"hljs language-php\">package it.peduz.badcode.bloaters.largeclass.badcode;\n\n<span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-class\"><span class=\"hljs-keyword\">class<\/span> <span class=\"hljs-title\">LargeClass<\/span> <\/span>{\n    <span class=\"hljs-comment\">\/*\n     * Class example for handling housework\n     *\/<\/span>\n\n     <span class=\"hljs-keyword\">public<\/span> void cookFirstPlate() {\n        <span class=\"hljs-comment\">\/\/...<\/span>\n     }\n\n     <span class=\"hljs-keyword\">public<\/span> void cookMainPlate() {\n        <span class=\"hljs-comment\">\/\/...<\/span>\n     }\n     \n     <span class=\"hljs-keyword\">public<\/span> void cleanWithVacuum() {\n        <span class=\"hljs-comment\">\/\/...<\/span>\n     }\n     \n     <span class=\"hljs-keyword\">public<\/span> void cleanWashingFloor() {\n        <span class=\"hljs-comment\">\/\/...<\/span>\n     }\n     \n     <span class=\"hljs-keyword\">public<\/span> void gardening() {\n        <span class=\"hljs-comment\">\/\/...<\/span>\n     }\n     \n     <span class=\"hljs-keyword\">public<\/span> void makeShopping() {\n        <span class=\"hljs-comment\">\/\/...<\/span>\n     }\n\n}\n<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-2\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">PHP<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">php<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<h4 class=\"wp-block-heading\" id=\"h-3-lunga-lista-di-parametri\">3. Lunga lista di parametri<\/h4>\n\n\n\n<p>Limitare il numero di parametri di una funzione migliora la chiarezza e la manutenibilit\u00e0 del codice. L&#8217;uso di oggetti di trasporto o la riduzione delle dipendenze sono strategie comuni in questo contesto.<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-3\" data-shcb-language-name=\"JavaScript\" data-shcb-language-slug=\"javascript\"><span><code class=\"hljs language-javascript\">public <span class=\"hljs-class\"><span class=\"hljs-keyword\">class<\/span> <span class=\"hljs-title\">LongParameterList<\/span> <\/span>{\n    \n    public <span class=\"hljs-keyword\">void<\/span> executeUpdate(<span class=\"hljs-built_in\">String<\/span> name, <span class=\"hljs-built_in\">String<\/span> secondName, <span class=\"hljs-built_in\">String<\/span> lastName, <span class=\"hljs-built_in\">String<\/span> dadName, \n                                <span class=\"hljs-built_in\">String<\/span> motherName, <span class=\"hljs-built_in\">String<\/span> placeOfBirth, <span class=\"hljs-built_in\">String<\/span> gender, <span class=\"hljs-built_in\">Date<\/span> dateOfBirth) {\n        <span class=\"hljs-comment\">\/\/...business logic<\/span>\n    }\n}<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-3\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">JavaScript<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">javascript<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<h4 class=\"wp-block-heading\" id=\"h-4-object-oriented-abusers\">4. Object Oriented Abusers<\/h4>\n\n\n\n<p>Evitare implementazioni errate di concetti orientati agli oggetti \u00e8 fondamentale. Campi temporanei, eccessi di strutture di controllo, eccesso di ereditariet\u00e0 e classi alternative con interfacce diverse sono &#8220;code smells&#8221; che richiedono attenzione.<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-4\" data-shcb-language-name=\"PHP\" data-shcb-language-slug=\"php\"><span><code class=\"hljs language-php\"> <span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-keyword\">List<\/span>&lt;Object&gt; elaborateData() {\n        data = <span class=\"hljs-keyword\">new<\/span> ArrayList&lt;&gt;();\n\n        <span class=\"hljs-keyword\">if<\/span>(hasValue1 &amp;&amp; !hasValue2 || value1 &gt; <span class=\"hljs-number\">1000<\/span>) {\n            <span class=\"hljs-keyword\">if<\/span>(!hasValue2) {\n                <span class=\"hljs-comment\">\/\/...<\/span>\n            } <span class=\"hljs-keyword\">else<\/span> <span class=\"hljs-keyword\">if<\/span>(value1 &gt; <span class=\"hljs-number\">1000<\/span>) {\n                <span class=\"hljs-comment\">\/\/....<\/span>\n            }\n        } <span class=\"hljs-keyword\">else<\/span> <span class=\"hljs-keyword\">if<\/span>(thing1 == <span class=\"hljs-keyword\">null<\/span> &amp;&amp; thing2 != <span class=\"hljs-keyword\">null<\/span>) {\n            <span class=\"hljs-keyword\">if<\/span>(hasValue1) {\n                <span class=\"hljs-comment\">\/\/...<\/span>\n            } <span class=\"hljs-keyword\">else<\/span> <span class=\"hljs-keyword\">if<\/span>(hasValue2) {\n                <span class=\"hljs-comment\">\/\/...<\/span>\n            } <span class=\"hljs-keyword\">else<\/span> <span class=\"hljs-keyword\">if<\/span>(value1 &gt; <span class=\"hljs-number\">100<\/span>) {\n                <span class=\"hljs-comment\">\/\/...<\/span>\n            } <span class=\"hljs-keyword\">else<\/span> <span class=\"hljs-keyword\">if<\/span>(value2 &lt; value1) {\n                <span class=\"hljs-comment\">\/\/...<\/span>\n            } <span class=\"hljs-keyword\">else<\/span> {\n                <span class=\"hljs-comment\">\/\/....<\/span>\n            }\n        } <span class=\"hljs-keyword\">else<\/span> <span class=\"hljs-keyword\">if<\/span>(thing2 == <span class=\"hljs-keyword\">null<\/span>) {\n            <span class=\"hljs-keyword\">if<\/span>(hasValue1) {\n                <span class=\"hljs-comment\">\/\/...<\/span>\n            } <span class=\"hljs-keyword\">else<\/span> <span class=\"hljs-keyword\">if<\/span>(hasValue2) {\n                <span class=\"hljs-comment\">\/\/...<\/span>\n            } <span class=\"hljs-keyword\">else<\/span> <span class=\"hljs-keyword\">if<\/span>(value1 &lt; <span class=\"hljs-number\">100<\/span>) {\n                <span class=\"hljs-comment\">\/\/...<\/span>\n            } <span class=\"hljs-keyword\">else<\/span> <span class=\"hljs-keyword\">if<\/span>(value2 &gt; value1) {\n                <span class=\"hljs-comment\">\/\/...<\/span>\n            } <span class=\"hljs-keyword\">else<\/span> {\n                <span class=\"hljs-comment\">\/\/....<\/span>\n            }\n        } <span class=\"hljs-keyword\">else<\/span> {\n            <span class=\"hljs-keyword\">if<\/span>(hasValue1) {\n                <span class=\"hljs-comment\">\/\/...<\/span>\n            } <span class=\"hljs-keyword\">else<\/span> <span class=\"hljs-keyword\">if<\/span>(hasValue2) {\n                <span class=\"hljs-comment\">\/\/...<\/span>\n            } <span class=\"hljs-keyword\">else<\/span> <span class=\"hljs-keyword\">if<\/span>(value1 &lt; <span class=\"hljs-number\">100<\/span>) {\n                <span class=\"hljs-comment\">\/\/...<\/span>\n            } <span class=\"hljs-keyword\">else<\/span> <span class=\"hljs-keyword\">if<\/span>(value2 &gt; value1) {\n                <span class=\"hljs-comment\">\/\/...<\/span>\n            } <span class=\"hljs-keyword\">else<\/span> {\n                <span class=\"hljs-comment\">\/\/....<\/span>\n            }\n        }\n\n        <span class=\"hljs-keyword\">return<\/span> data;\n    }<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-4\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">PHP<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">php<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<h4 class=\"wp-block-heading\" id=\"h-5-cambiamento-divergente\">5. Cambiamento divergente<\/h4>\n\n\n\n<p>Strutturare il codice in modo da limitare l&#8217;impatto delle modifiche richieste in punti specifici migliora la flessibilit\u00e0 del sistema.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"h-6-dispensabilita\">6. Dispensabilit\u00e0<\/h4>\n\n\n\n<p>Eliminare il codice duplicato, il codice morto e le generalit\u00e0 speculative migliora l&#8217;efficienza del sistema e facilita la comprensione.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"h-7-accoppiamento\">7. Accoppiamento <\/h4>\n\n\n\n<p>Risolvere &#8220;code smells&#8221; come feature envy, inappropriate intimacy e message chain riduce il forte accoppiamento tra le classi, semplificando la manutenzione e l&#8217;evoluzione del sistema.<\/p>\n\n\n\n<p>In conclusione, <strong>il refactoring \u00e8 una scelta necessaria nello sviluppo del software che contiene &#8220;code smells&#8221;<\/strong>; utilizzare buone pratiche di programmazione contribuisce a ottenere un codice robusto, flessibile e facilmente mantenibile nel tempo. Come artigiani del software, siamo chiamati a coltivare l&#8217;attenzione per la qualit\u00e0 e la dedizione al miglioramento continuo. <\/p>\n\n\n\n<p>Ricordiamoci che un codice pulito \u00e8 un investimento nel successo a lungo termine dei nostri progetti<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p><a href=\"https:\/\/www.codemotion.com\/magazine\/it\/dev-community\/angular-control-flow-la-guida-completa\/\" target=\"_blank\" aria-label=\"Articolo consigliato: Angular Control Flow, la guida completa (opens in a new tab)\" rel=\"noreferrer noopener\" class=\"ek-link\"><em>Articolo consigliato: Angular Control Flow, la guida completa<\/em><\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Il refactoring svolge un ruolo fondamentale nella creazione e nella manutenzione di un codice di alta qualit\u00e0. Questo processo di miglioramento graduale mira a eliminare i cosiddetti &#8220;code smells&#8221;, che sono indicatori di potenziali problemi nel design e nella struttura del codice. Analizziamo pi\u00f9 da vicino alcuni dei code smells pi\u00f9 comuni e le pratiche&#8230; <a class=\"more-link\" href=\"https:\/\/www.codemotion.com\/magazine\/it\/frontend-it\/migliorare-la-qualita-del-codice-attraverso-il-refactoring-una-guida-completa\/\">Read more<\/a><\/p>\n","protected":false},"author":218,"featured_media":18298,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_editorskit_title_hidden":false,"_editorskit_reading_time":0,"_editorskit_is_block_options_detached":false,"_editorskit_block_options_position":"{}","_uag_custom_page_level_css":"","_genesis_hide_title":false,"_genesis_hide_breadcrumbs":false,"_genesis_hide_singular_image":false,"_genesis_hide_footer_widgets":false,"_genesis_custom_body_class":"","_genesis_custom_post_class":"","_genesis_layout":"","footnotes":""},"categories":[10265],"tags":[11625,11623],"collections":[11708],"class_list":{"0":"post-25043","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-frontend-it","8":"tag-clean-code","9":"tag-refactoring","10":"collections-dalla-community","11":"entry"},"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v26.9 (Yoast SEO v27.5) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Code Smells e Refactoring: Come Migliorare la Qualit\u00e0 del Codice<\/title>\n<meta name=\"description\" content=\"Navigare tra Code Smells e Refactoring: Guida Completa per Migliorare la Qualit\u00e0 del Codice\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.codemotion.com\/magazine\/it\/frontend-it\/migliorare-la-qualita-del-codice-attraverso-il-refactoring-una-guida-completa\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Migliorare la qualit\u00e0 del codice attraverso il refactoring: Una guida completa\" \/>\n<meta property=\"og:description\" content=\"Navigare tra Code Smells e Refactoring: Guida Completa per Migliorare la Qualit\u00e0 del Codice\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.codemotion.com\/magazine\/it\/frontend-it\/migliorare-la-qualita-del-codice-attraverso-il-refactoring-una-guida-completa\/\" \/>\n<meta property=\"og:site_name\" content=\"Codemotion Magazine\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/Codemotion.Italy\/\" \/>\n<meta property=\"article:published_time\" content=\"2023-12-04T16:02:44+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2024-01-25T11:26:12+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.codemotion.com\/magazine\/wp-content\/uploads\/2022\/07\/jackson-sophat-_t-l5FFH8VA-unsplash.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1920\" \/>\n\t<meta property=\"og:image:height\" content=\"1080\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"peduz91\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@peduz91\" 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