May 2011
Intermediate to advanced
800 pages
39h 19m
German
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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.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.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.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.
R1.23 Zeitkonten zusammenzählen
Aufgabe
Sie möchten beispielsweise die von einem Arbeitnehmer geleisteten Arbeitsstunden zusammenzählen. Falls Sie dabei aber so vorgehen wollen, wie es im Vorgängerrezept „R1.21 Mit dem Datum rechnen“ (Mit dem Datum rechnen) gezeigt wurde, werden Sie keinen Erfolg haben, da sich Stundenzahlen größer 23 nicht darstellen lassen. Außerdem können negative Gleitkommazahlen nicht als Datum/Uhrzeit interpretiert werden.
Lösung
Wir verzichten auf den Date-Typ und schreiben stattdessen eine eigene Funktion, der wir die zu addierenden Zeiten als String-Typen im Format hh:mm:ss übergeben. Beide Strings werden »zerlegt«, in Sekunden umgerechnet und zusammengezählt. Rückgabewert ist wieder eine Zeit als String-Typ.
Oberfläche
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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.