August 2012
Intermediate to advanced
624 pages
17h 11m
Polish
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10.5. Wykorzystanie funkcji. Parametry i zwracane wartości
Problem
Chcemy skorzystać z funkcji, do której trzeba przekazać pewne wartości. W jaki sposób przekazuje się parametry do funkcji? Jak przekazać wynik wykonania funkcji?
Rozwiązanie
W przeciwieństwie do składni wielu języków programowania parametry funkcji powłoki nie mogą być otoczone znakami nawiasu. Wszystkie parametry funkcji bash muszą zostać wymienione bezpośrednio za nazwą tej funkcji, a poszczególne z nich muszą zostać rozdzielone znakami spacji (podobnie jak w przypadku wywoływania skryptu lub polecenia). Jeśli to konieczne, muszą również zostać odpowiednio zabezpieczone znakami apostrofu lub lewego ukośnika!
# definicja funkcji function max () { ... } # # wywołanie funkcji # max ...Become 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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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.