August 2012
Intermediate to advanced
624 pages
17h 11m
Polish
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13.5. Pobieranie danych wynikowych z wykorzystaniem wywołania funkcji
Problem
Chcemy zapisać dane wynikowe pewnego programu w zmiennych, które będą mogły zostać wykorzystane w dalszej części skryptu. Gdy do analizy wartości używane są pętle, problem ten można łatwo rozwiązać, stosując tablice. Jednak gdy chcemy użyć niezależnych odwołań do wartości zamiast odwołań indeksowych, powstały kod staje się bardzo nieczytelny.
Rozwiązanie
Do wyodrębniania poszczególnych słów można wykorzystać funkcję:
#!/usr/bin/env bash # plik receptury: parseViaFunc # # wyodrębnienie danych wynikowych polecenia ls -l za pomocą funkcji # przykład listingu wynikowego instrukcji ls -l: # -rw-r--r-- 1 albing users 126 2006-10-10 22:50 testowy function lsparts () { PERMS=$1 ...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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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.