August 2012
Intermediate to advanced
624 pages
17h 11m
Polish
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13.1. Przetwarzanie parametrów skryptu powłoki
Problem
Chcemy umożliwić przekazywanie do skryptu powłoki pewnych opcji — określonych znaczników, które zmienią działanie skryptu. Zadanie to można zrealizować, stosując mechanizmy bezpośredniej interpretacji — z wykorzystaniem zmiennej ${#} do sprawdzenia liczby parametrów oraz testu ${1:0:1} do ustalenia, czy pierwszy znak parametru jest znakiem myślnika. W takim przypadku konieczne byłoby również użycie instrukcji logicznych if-then lub case do wyróżnienia poszczególnych opcji i sprawdzenia, czy wymagają dostarczenia parametru. Ale co się stanie, jeśli użytkownik nie wprowadzi obowiązkowego parametru? Jakie będzie zachowanie skryptu, gdy użytkownik połączy dwie opcje (np. –ab)? Czy konieczna jest ...
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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.