April 2020
Intermediate to advanced
506 pages
20h 7m
Polish
Content preview from Go
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98 Rozdział 3.
Zwracanie wielu wartości
Używanie wielu zwracanych wartości w funkcji paintNeeded
Na poprzedniej stronie przekonałeś się, że można zwrócić wiele wartości dowolnego typu. Jednak
najczęściej technika ta jest stosowana do zwracania podstawowej wartości i dodatkowej wartości
informującej, czy w funkcji wystąpił błąd. Ta dodatkowa wartość jest zwykle ustawiana na
nil
,
jeśli nie wystąpiły problemy, i na wartość błędu, jeżeli wystąpiły usterki.
Ta konwencja zostanie wykorzystana także w funkcji
paintNeeded
. Zadeklarujesz, że zwraca ona
dwie wartości — typów
float64
i
error
(wartości błędu są typu
error
). Pierwszą rzeczą w bloku
funkcji ...
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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.