November 2024
Intermediate to advanced
802 pages
19h 26m
French
Content preview from Manuel de cuisine Scala, 2e édition
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Chapitre 16. Fichiers et processus
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Lorsqu'il s'agit de travailler avec des fichiers, bon nombre des solutions présentées dans ce chapitre utilisent des classes Java, mais pour certaines situations, la classe scala.io.Source et son objet compagnon offrent de belles simplifications par rapport à Java. Non seulement Source facilite l'ouverture et la lecture de fichiers texte, mais il permet également d'accomplir facilement d'autres tâches, telles que le téléchargement de contenu à partir d'URL ou la substitution d'un String à un File.
Les recettes de fichiers de ce chapitre te montreront comment faire :
-
Lire et écrire des fichiers texte et binaires
-
Utilise le modèle de prêt avec
scala.util.Usingpour fermer automatiquement les ressources. -
Traite chaque caractère d'un fichier
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Traite un site
Stringcomme un siteFile, généralement dans le but de le tester. -
Sérialiser et désérialiser des objets dans des fichiers
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Liste les fichiers et les répertoires
Ensuite, lorsqu'il s'agit de travailler avec des processus, les classes de processus Scala sont écrites comme un DSL afin que tu puisses exécuter des commandes système externes d'une manière qui ressemble à celle d'Unix. La possibilité d'exécuter des commandes système est utile pour les applications et formidable pour les scripts.
Les classes et les méthodes du package scala.sys.process te permettent ...
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