November 2024
Intermediate to advanced
430 pages
9h 7m
French
Content preview from Livre de cuisine du code propre
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Chapitre 19. Hiérarchies
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L'un des aspects d'une classe était de servir de dépôt pour le code et les informations partagés par toutes les instances (objets) de cette classe. En termes d'efficacité, c'est une bonne idée car l'espace de stockage est minimisé et les modifications peuvent être effectuées en un seul endroit. Il est cependant très tentant d'utiliser ce fait pour justifier la création d'une hiérarchie de classes basée sur le code partagé plutôt que sur les comportements partagés... Crée toujours des hiérarchies basées sur des comportements partagés.
David West, Pensée objet
19.0 Introduction
L'héritage de classes est souvent utilisé à tort pour la réutilisation du code, pour des raisons historiques. Tu devrais préférer la composition, mais ce n'est pas si évident et cela demande plus d'expérience. La composition est dynamique et tu peux facilement la modifier, la tester, la réutiliser, etc, ce qui donne de la souplesse à tes conceptions. Dans ce chapitre, tu trouveras des recettes pour minimiser le couplage accidentel que tu ajoutes en utilisant des hiérarchies.
19.1 Rompre l'héritage profond
Problème
Tu as des hiérarchies profondes pour réutiliser le code.
Solution
Trouve le protocole et aplatis la hiérarchie en favorisant la composition plutôt que l'héritage.
Discussion
La réutilisation de sous-classification statique crée plus ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.