August 2022
Intermediate to advanced
280 pages
4h 55m
French
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22. Délégués
Un délégué connecte un appelant de méthode à sa méthode cible au moment de l’exécution. Un délégué comporte deux aspects : le type et l’instance. Un type délégué définit un protocole auquel l’appelant et la cible se conformeront, et qui comprend une liste de types de paramètres et un type de retour. Une instance déléguée est un objet qui fait référence à une ou plusieurs méthodes cibles se conformant à ce protocole.
Une instance de délégué agit littéralement comme un délégué pour l’appelant : l’appelant appelle le délégué, puis le délégué appelle la méthode cible. Cette indirection découple l’appelant de la méthode cible.
Une déclaration de type délégué est précédée du mot-clé delegate, mais si ce n’est pas le cas, elle ressemble à ...
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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.
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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.