February 2015
Intermediate to advanced
664 pages
24h 26m
Polish
Content preview from Programowanie w JavaScript Rusz głową!
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jesteś tutaj
591
Stosowanie prototypów
Jak działa dziedziczenie?
W jaki sposób ma działać metoda
bark
, skoro nie ma jej w obiektach poszczególnych psów,
a znajduje się jedynie w ich prototypie? To właśnie w tym momencie wkracza do akcji
dziedziczenie. Kiedy wywołujemy jakąś metodę na rzecz instancji obiektu, a metody tej nie
można znaleźć w samej instancji, to zostanie podjęta próba odszukania jej w prototypie.
Poniżej pokazaliśmy, jak to działa.
species: "Psowate"
Prototyp Dog
bark()
run()
wag()
fido.bark();
Ale w nim nie ma
metody bark! W takim
razie poszukamy jej
wyżej — w prototypie…
1
Na początku będziemy potrzebowali
jakiegoś kodu, takiego jak ten. ...
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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.
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.