{"id":77153,"date":"2020-04-08T01:43:13","date_gmt":"2020-04-07T23:43:13","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/vyshel-crystal-0-34-0"},"modified":"2020-04-08T01:43:13","modified_gmt":"2020-04-07T23:43:13","slug":"vyshel-crystal-0-34-0","status":"publish","type":"post","link":"https:\/\/prohoster.info\/it\/blog\/news\/vyshel-crystal-0-34-0","title":{"rendered":"\u00c8 uscita Crystal 0.34.0","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>\u00c8 stata rilasciata una nuova versione di Crystal, un linguaggio di programmazione compilato con sintassi Ruby. Le principali caratteristiche includono un runtime con un event loop \"integrato\", in cui tutte le operazioni di input\/output sono asincrone, supporto per la multithreading (attualmente abilitato tramite un flag durante la compilazione) e un modo eccezionalmente semplice e conveniente di lavorare con le librerie in C.<\/p>\n<p>Con la versione 0.34.0, il linguaggio inizia ufficialmente a muoversi con fermezza verso il primo reale rilascio (cio\u00e8 la versione 1.0).<\/p>\n<p>Nella nuova versione di Crystal si possono notare le seguenti modifiche e miglioramenti in ordine di importanza:<\/p>\n<ul>\n<li>\n<p>\u00c8 stata aggiunta una nuova libreria di registrazione all'API <strong>Log<\/strong>, che, a differenza della precedente, \u00e8 in grado di indirizzare i messaggi verso diversi backend e di filtrare questi messaggi in modo diverso a seconda della \"sorgente\".<\/p>\n<\/li>\n<li>\n<p>Rudimenti dal mondo dello sviluppo in C, <strong>Errno<\/strong> e <strong>WinError<\/strong>, utilizzati per i primitivi di input\/output, stanno scomparendo grazie alla gerarchia delle eccezioni <strong>IO::Error<\/strong> (peraltro, al momento, nessuno vieta di utilizzare Errno).<\/p>\n<\/li>\n<li>\n<p>\u00c8 stata rimossa l'inserzione automatica di else nil dall'operatore <strong>case\/when\/else<\/strong>. Questo \u00e8 stato fatto per escludere la possibilit\u00e0 che uno sviluppatore possa accidentalmente saltare uno dei rami. <strong>when<\/strong> quando si esegue il matching su casi deterministici come gli enum e il passaggio tra i tipi di Union. In altre parole, un codice come questo non funzioner\u00e0 pi\u00f9 senza specificare un ulteriore <strong>when<\/strong> (when Char) o assegnazione <strong>else<\/strong>- ramo:<\/p>\n<\/li>\n<\/ul>\n<p>a = 1 || 'x' || \"foo\"<br \/>\ncase a<br \/>\nquando Int32<br \/>\n  # &#8230;<br \/>\nquando String<br \/>\n  # &#8230;<br \/>\nend<\/p>\n<ul>\n<li>\n<p>Opzione del compilatore <strong>disable_overflow<\/strong> non \u00e8 pi\u00f9 disponibile. Per le operazioni di overflow, utilizzare i metodi &amp;+, &amp;-, &amp;*.<\/p>\n<\/li>\n<li>\n<p><strong>Array#fill<\/strong> ora vola pi\u00f9 veloce di un proiettile, grazie alla sostituzione di un ciclo poco efficiente con un semplice memset;<\/p>\n<\/li>\n<li>\n<p>Il gestore di shard (pacchetti), che si chiama, paradossalmente, <strong>shards<\/strong>, ora utilizza un algoritmo pi\u00f9 veloce ed efficiente per la risoluzione delle dipendenze, Molinillo, ispirato a CocoaPods (Swift) e Builder (Ruby).<\/p>\n<\/li>\n<li>\n<p>Aggiunto supporto per <strong>LLVM 10<\/strong>, il che dovrebbe darci un certo aumento di prestazioni, stabilit\u00e0, ecc.<\/p>\n<\/li>\n<\/ul>\n<p>&hellip; e molte altre, a mio parere, miglioramenti meno significativi.<\/p>\n<p>Vorrei sottolineare che Crystal \u00e8 un linguaggio costruito su LLVM, che consente di scrivere applicazioni talvolta pi\u00f9 velocemente, facilmente e in modo conciso rispetto ai suoi \"fratelli\" interpretati, ottenendo al contempo un binario piuttosto performante. Rispetto a Golang, si distingue per un supporto completo della programmazione orientata agli oggetti, supporto per generics e una sintassi molto semplice e comprensibile. Per molteplici aspetti, \u00e8 simile a Nim, ma \u00e8 chiaramente orientato a un'applicazione pratica \"qui e ora\", grazie alla quale offre un arsenale di strumenti ben documentati, utili e di qualit\u00e0, supportati dagli sviluppatori del linguaggio e quindi piuttosto stabili.<\/p>\n<p>Fonte: <a \ncontent=\"nofollow\" rel=\"nofollow\" href=\"http:\/\/www.linux.org.ru\/news\/development\/15627605\">linux.org.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u0412\u044b\u0448\u043b\u0430 \u043d\u043e\u0432\u0430\u044f \u0432\u0435\u0440\u0441\u0438\u044f Crystal, \u043a\u043e\u043c\u043f\u0438\u043b\u0438\u0440\u0443\u0435\u043c\u043e\u0433\u043e \u044f\u0437\u044b\u043a\u0430 \u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u044f \u0441 \u0441\u0438\u043d\u0442\u0430\u043a\u0441\u0438\u0441\u043e\u043c Ruby, \u0433\u043b\u0430\u0432\u043d\u044b\u0435 \u043e\u0441\u043e\u0431\u0435\u043d\u043d\u043e\u0441\u0442\u0438 \u043a\u043e\u0442\u043e\u0440\u043e\u0433\u043e &mdash; \u0440\u0430\u043d\u0442\u0430\u0439\u043c \u0441 &laquo;\u0432\u043c\u043e\u043d\u0442\u0438\u0440\u043e\u0432\u0430\u043d\u043d\u044b\u043c&raquo; event loop&rsquo;\u043e\u043c, \u0432 \u043a\u043e\u0442\u043e\u0440\u043e\u043c \u0432\u0441\u0435 \u043e\u043f\u0435\u0440\u0430\u0446\u0438\u0438 \u0432\u0432\u043e\u0434\u0430-\u0432\u044b\u0432\u043e\u0434\u0430 \u0430\u0441\u0438\u043d\u0445\u0440\u043e\u043d\u043d\u044b, \u043f\u043e\u0434\u0434\u0435\u0440\u0436\u043a\u0430 \u043c\u043d\u043e\u0433\u043e\u043f\u043e\u0442\u043e\u0447\u043d\u043e\u0441\u0442\u0438 (\u043f\u043e\u043a\u0430 \u0432\u043a\u043b\u044e\u0447\u0430\u0435\u0442\u0441\u044f \u0444\u043b\u0430\u0433\u043e\u043c \u043f\u0440\u0438 \u043a\u043e\u043c\u043f\u0438\u043b\u044f\u0446\u0438\u0438) \u0438 \u0438\u0441\u043a\u043b\u044e\u0447\u0438\u0442\u0435\u043b\u044c\u043d\u043e \u043f\u0440\u043e\u0441\u0442\u0430\u044f \u0438 \u0443\u0434\u043e\u0431\u043d\u0430\u044f \u0440\u0430\u0431\u043e\u0442\u0430 \u0441 \u0431\u0438\u0431\u043b\u0438\u043e\u0442\u0435\u043a\u0430\u043c\u0438 \u043d\u0430 \u0421\u0438. \u041d\u0430\u0447\u0438\u043d\u0430\u044f \u0441 \u0432\u0435\u0440\u0441\u0438\u0438 0.34.0, \u044f\u0437\u044b\u043a \u043e\u0444\u0438\u0446\u0438\u0430\u043b\u044c\u043d\u043e \u043d\u0430\u0447\u0438\u043d\u0430\u0435\u0442 \u0442\u0432\u0451\u0440\u0434\u043e\u0439 \u043f\u043e\u0441\u0442\u0443\u043f\u044c\u044e \u0434\u0432\u0438\u0433\u0430\u0442\u044c\u0441\u044f \u0432 \u0441\u0442\u043e\u0440\u043e\u043d\u0443 \u043f\u0435\u0440\u0432\u043e\u0433\u043e [&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-77153","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.0.1 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u0412\u044b\u0448\u043b\u0430 \u043d\u043e\u0432\u0430\u044f \u0432\u0435\u0440\u0441\u0438\u044f Crystal, \u043a\u043e\u043c\u043f\u0438\u043b\u0438\u0440\u0443\u0435\u043c\u043e\u0433\u043e \u044f\u0437\u044b\u043a\u0430 \u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u044f \u0441 \u0441\u0438\u043d\u0442\u0430\u043a\u0441\u0438\u0441\u043e\u043c Ruby, \u0433\u043b\u0430\u0432\u043d\u044b\u0435 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