December 2007
Intermediate to advanced
272 pages
14h 20m
German
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Logische Operatoren && AND || OR
Conditions (und nur diese) können mittels eines logischen Operators verknüpft werden. Es gibt das logische UND (bezeichnet mit AND oder &&) und das logische ODER (bezeichnet mit OR oder ||). Der AND-Operator hat Vorrang, und wenn kein Operator zwischen die Conditions geschrieben wird, impliziert dies den OR-Operator:
[browser = msie] && [version => 6] [browser = netscape] OR [system = mac] [browser = netscape] || [browser = msie] AND [version= <7]
Die letzte Zeile legt beispielsweise fest, dass der Browser entweder den Useragent-String netscape tragen muss (also Netscape, Firefox, ...), bei dem die Version egal ist, oder ein Microsoft Internet Explorer sein muss - in diesem Fall aber mit einer Versionsnummer unter ...
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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.
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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.