April 2020
Intermediate to advanced
506 pages
20h 7m
Polish
Content preview from Go
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36 Rozdział 2.
Wiele zwracanych wartości
Problem polega na tym, że metoda
ReadString
próbuje zwrócić dwie wartości,
a podana jest tylko
jedna zmienna, do której przypisana ma zostać wartość.
W większości języków programowania funkcje i metody mogą zwracać tylko
jedną wartość. Jednak w Go zwracana może być dowolna liczba wartości.
Najczęstsze zastosowanie zwracania kilku wartości w Go związane jest ze
zwracaniem dodatkowej wartości informującej o błędach. Można ją sprawdzić,
aby ustalić, czy w trakcie pracy danej funkcji lub metody wystąpiły jakieś
problemy. Oto kilka przykładów:
// Program pass_fail informuje, czy dany wynik…
package main
import ...
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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.