September 2012
Intermediate to advanced
302 pages
6h 31m
German
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B Objektreferenz
Auch die eingebauten Objekte von JavaScript werden hier im Anhang als Nachschlagequelle noch einmal behandelt. Auch hier kann der Leser im Mozilla Developer Network weiter gehende Informationen finden.
B.1 Boolean
Das Boolean-Objekt ist ein Wrapper für das Boolean-Literal.
B.1.1 Konstruktor
Dem Boolean-Konstruktor übergibt man als optionalen Parameter einen Wert. Wenn der Parameter nicht übergeben wird, dann hat das boolesche Objekt den Wert false.
Wenn als Parameter ein Literal übergeben wird, dann ist das boolesche Objekt nur dann false, wenn der Parameter den Wert 0, -0, null, false, NaN, undefined hat oder ein leerer String ist. Alle anderen Werte erzeugen ein boolesches Objekt mit dem Wert true.
Wenn als Parameter ein Objekt ...
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