April 2025
Intermediate to advanced
706 pages
22h 40m
Italian
Content preview from JavaScript: The Definitive Guide, 7a edizione
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Capitolo 16. JavaScript lato server con Node
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Node è JavaScript con legami con il sistema operativo sottostante, il che rende possibile scrivere programmi JavaScript che leggono e scrivono file, eseguono processi figli e comunicano in rete. Questo rende Node utile come un:
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Un'alternativa moderna agli script di shell che non soffre dell'arcana sintassi di bash e di altre shell Unix.
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Linguaggio di programmazione di uso generale per l'esecuzione di programmi fidati, non soggetto ai vincoli di sicurezza imposti dai browser web sul codice non fidato.
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Un ambiente popolare per scrivere server web efficienti e altamente concorrenziali.
La caratteristica distintiva di Node è la sua concomitanza single-thread basata sugli eventi, abilitata da un'API asincrona di default. Se hai programmato in altri linguaggi ma non hai fatto molto codice JavaScript, o se sei un programmatore JavaScript lato client esperto abituato a scrivere codice per i browser web, l'uso di Node sarà un po' un adattamento, come ogni nuovo linguaggio o ambiente di programmazione. Questo capitolo inizia spiegando il modello di programmazione di Node, con particolare attenzione alla concorrenza, alle API di Node per lavorare con i dati in streaming e al tipo di Buffer di Node per lavorare con i dati binari. Queste sezioni iniziali sono seguite da sezioni che evidenziano e dimostrano ...
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