April 2020
Intermediate to advanced
506 pages
20h 7m
Polish
Content preview from Go
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Nazywanie danych
Wartości zerowe w mapach
Podobnie jak w tablicach i wycinkach dostęp do klucza mapy, do którego nie
przypisano wartości, powoduje zwrócenie wartości zerowej.
W zależności od typu wartości wartość zerowa może być różna od
0
. W mapach,
gdzie wartości są typu
string
, wartością zerową jest pusty łańcuch znaków.
Podobnie jak w tablicach i wycinkach, tak i tu wartości zerowe umożliwiają
bezpieczne operowanie elementami map nawet wtedy, gdy nie zostały im jeszcze
bezpośrednio przypisane wartości.
Wartość zerowa zmiennej reprezentującej mapę to nil
Podobnie jak w wycinkach, tak i tu wartością zerową zmiennej reprezentującej ...
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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.