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 7. Funktionen
Eine Funktion ist ein Block mit JavaScript-Code, der einmal definiert wird, aber beliebig oft ausgeführt oder aufgerufen werden kann. Das hinter Funktionen stehende Konzept ist Ihnen vielleicht bereits unter Namen wie Subroutine oder Prozedur bekannt. JavaScript-Funktionen sind parametrisiert: Eine Funktionsdefinition kann eine Liste mit Bezeichnern einschließen, die als Parameter bezeichnet werden und als lokale Variablen für den Codeinhalt der Funktion dienen. Funktionsaufrufe geben Werte oder Argumente für die Parameter einer Funktion an. Funktionen nutzen häufig die Werte ihrer Argumente, um einen Rückgabewert zu berechnen, der zum Wert des Funktionsaufrufausdrucks wird. Neben den Argumenten hat jeder Aufruf einen ...
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