April 2007
Intermediate to advanced
1100 pages
62h 31m
German
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4.4 Primitive Datentypen und Referenztypen
Nun müssen wir uns mit dem Inhalt von Variablen befassen. Häufig
wird gesagt, dass Variablen Werte haben oder enthalten. Was genau
enthalten sie nun aber eigentlich? Um diese scheinbar einfache Frage
zu beantworten, müssen wir uns noch einmal die Datentypen ansehen, die
JavaScript unterstützt. Es gibt zwei Gruppen von Typen: die primitiven
Datentypen und die Referenztypen. Zahlen, Boolesche Werte und die
Typen null und undefined sind
primitive Datentypen. Objekte, Arrays und Funktionen sind
Referenztypen.
Ein primitiver Datentyp nimmt im Speicher eine feste Größe ein. Eine Zahl nimmt zum Beispiel acht Bytes Speicherplatz ein, während ein Boolescher Wert mit nur einem Bit dargestellt werden kann. Der größte ...
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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.