February 2015
Intermediate to advanced
664 pages
24h 26m
Polish
Content preview from Programowanie w JavaScript Rusz głową!
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Rozdział 13
Zastosowanie prototypów do określania wartości początkowych
Bardziej interesująca implementacja metody sit
Spróbujmy nieco uatrakcyjnić metodę
sit
: początkowo pies nie będzie siedział (czyli będzie
stał). Kiedy zatem wywołamy metodę
sit
, a pies nie będzie siedział, metoda ta sprawi, że pies
wykona siad. W przeciwnym razie poinformujemy tylko użytkownika, że pies już siedzi. Będzie
nam potrzebna dodatkowa właściwość,
sitting
, która przechowa informację o tym, czy pies już
siedzi, czy nie. Napiszemy teraz kod nowej wersji metody.
Dog.prototype.sitting = false;
Dog.prototype.sit = function() {
if (this.sitting) {
console.log(this.name ...
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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.