July 2012
Intermediate to advanced
288 pages
6h 12m
German
Content preview from JavaScript kurz & gut, 4th EditionBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Chapter 3. Ausdrücke und Operatoren
Ein Ausdruck ist eine JavaScript-Äußerung, die der JavaScript-Interpreter auswerten kann, um einen Wert hervorzubringen. Eine Konstante, die direkt in Ihr Programm eingebettet ist, ist eine sehr einfache Art von Ausdruck. Ein Variablenname ist ebenfalls ein einfacher Ausdruck, der zu dem Wert ausgewertet wird, der dieser Variable zugewiesen wurde. Komplexe Ausdrücke werden aus einfacheren Ausdrücken aufgebaut. Ein Array-Zugriffsausdruck besteht beispielsweise aus einem Ausdruck, der zu einem Array ausgewertet wird, auf den eine öffnende eckige Klammer folgt, dann aus einem Ausdruck, der zu einer ganzen Zahl ausgewertet wird, und schließlich aus einer schließenden eckigen Klammer. Dieser neue, komplexere Ausdruck ...
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