April 2020
Intermediate to advanced
506 pages
20h 7m
Polish
Content preview from Go
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496 Dodatek B.
Inicjalizacja w instrukcji if
for x := 4; x <= 6; x++ {
fmt.Println(“x wynosi teraz”, x)
}
Teraz załóżmy, że dodałeś w funkcji
main
kolejne wywołanie
saveString
, gdzie też
używana jest zmienna
err
. Trzeba pamiętać, aby w pierwszym wywołaniu zastosować
krótką deklarację zmiennej
err
, a potem używać przypisań. W przeciwnym razie wystąpi
błąd kompilacji związany z próbą ponownego zadeklarowania zmiennej.
Tu zmienna
err
jest używana tylko
w instrukcji
if
i jej bloku. A może
istnieje sposób na ograniczenie zasięgu
zmiennej, tak aby każde jej wystąpienie
było traktowane jak odrębna zmienna?
Pamiętasz, jak w
rozdziale 2
. po
raz pierwszy ...
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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.