April 2020
Intermediate to advanced
506 pages
20h 7m
Polish
Content preview from Go
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244 Rozdział 8.
Wskaźniki i pola struktur
Aby otrzymać wartość wskazywaną przez wskaźnik, trzeba użyć operatora
*
(można go nazwać „operatorem wartości spod adresu”).
Możesz więc sądzić, że trzeba używać operatora
*
także ze wskaźnikami do struktur.
Jednak samo umieszczenie
*
przed wskaźnikiem do struktury nie zadziała:
Jeśli zastosujesz zapis
*pointer.myField
, Go uzna, że pole
myField
musi
zawierać wskaźnik. Tak jednak nie jest, dlatego zwracany jest błąd. Aby ta technika
zadziałała, musisz umieścić człon
*pointer
w nawiasie. To spowoduje pobranie
wartości typu
myStruct
, po czym można uzyskać dostęp do pola tej struktury.
Dostęp do pól struktur ...
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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.