April 2020
Intermediate to advanced
506 pages
20h 7m
Polish
Content preview from Go
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108 Rozdział 3.
Wskaźniki i funkcje
Poprawianie funkcji double z użyciem wskaźników
Dostępna jest funkcja
double
, która przyjmuje wartość typu
int
i mnoży ją przez 2. Chcesz móc
przekazać wartość i otrzymać jej dwukrotność. Jednak, jak już wiesz, Go jest językiem z przekazywaniem
przez wartość, co oznacza, że w parametrach funkcji zapisywana jest
kopia argumentów z jednostki
wywołującej. Funkcja podwaja więc kopię wartości i nie modyfikuje pierwotnej zmiennej.
W tym przykładzie przydatny okaże się objazd, w którym poznałeś wskaźniki. Jeśli przekażesz
do funkcji wskaźnik, a następnie zmodyfikujesz wskazywaną przez niego wartość, zmiany będą
widoczne ...
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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.