February 2015
Intermediate to advanced
664 pages
24h 26m
Polish
Content preview from Programowanie w JavaScript Rusz głową!
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Funkcje anonimowe, zasięg i domknięcia
Zagnieżdżanie funkcji
Definiowanie funkcji wewnątrz innej funkcji jest całkowicie dopuszczalne. Oznacza to,
że wewnątrz jednej funkcji można umieścić deklarację innej lub wyrażenie funkcyjne.
A jak to działa? Oto krótka odpowiedź na to pytanie: jedyną różnicą pomiędzy funkcją
zdefiniowaną na najwyższym poziomie kodu a funkcją zdefiniowaną wewnątrz innej
jest ich zasięg. Innymi słowy, umieszczenie jednej funkcji wewnątrz innej ma wpływ na
to, w których miejscach kodu będzie ona widoczna.
Aby zrozumieć to zagadnienie, rozszerzymy nieco nasz przykład, dodając do niego
zagnieżdżone deklaracje funkcji ...
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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.