August 2012
Intermediate to advanced
624 pages
17h 11m
Polish
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6.15. Przetwarzanie parametrów wiersza polecenia
Problem
Chcemy utworzyć skrypt powłoki, który wygeneruje wiersz złożony z myślników. Skrypt powinien być parametryzowany i umożliwiać określenie liczby znaków oraz pozwalać na wskazanie innego znaku niż myślnik. Składnia wywołania powinna być następująca:
dashes #wyświetlenie 72 znaków myślnika dashes 50 #wyświetlenie 50 znaków myślnika dashes –c= 50 #wyświetlenie 50 znaków równości dashes –cx #wyświetlenie 72 znaków x
Czy jest jakiś łatwy sposób przeanalizowania tego typu parametrów?
Rozwiązanie
W profesjonalnym skrypcie należałoby wykorzystać wbudowane polecenie powłoki getopts. Celem tej receptury jest jednak przedstawienie instrukcji case w działaniu. Z tego względu przetwarzanie parametrów wywołania ...
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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.