January 2016
Intermediate to advanced
112 pages
2h 27m
Polish
Content preview from Tajniki języka JavaScript -- Zakresy i domknięcia
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Dodatek A Zakres dynamiczny
W rozdziale 2. poruszyłem kwestię zakresu dynamicznego traktowanego jako przeciwieństwo modelu zakresu leksykalnego, który odzwierciedla sposób działania zakresu w JavaScript (i tak naprawdę w większości innych języków programowania).
W dodatku tym pokrótce przeanalizujemy zakres dynamiczny. Trzeba w tym miejscu koniecznie dodać, że zakres dynamiczny jest w rzeczywistości bliskim kuzynem innego mechanizmu JavaScript o nazwie this, którego dokładne omówienie znajdziesz w innej książce z tej serii, zatytułowanej Tajniki języka JavaScript. Wskaźnik this i prototypy obiektów.
Jak pokazałem w rozdziale 2., zakres leksykalny to zbiór reguł używanych przez silnik w celu przeprowadzenia operacji wyszukiwania zmiennej. Kluczową ...
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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.