August 2012
Intermediate to advanced
624 pages
17h 11m
Polish
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4.4. Jednoczesne wykonanie kilku poleceń
Problem
Chcemy wykonać trzy polecenia, które są niezależne od siebie i nie ma powodu, aby oczekiwały na zakończenie innych instrukcji z grupy.
Rozwiązanie
Dodanie na końcu polecenia znaku (&) pozwala na uruchomienie tego polecenia w tle. Wszystkie trzy instrukcje można więc wyzwolić w tym samym czasie:
$ długa & [1] 3242 $ średnia & [2] 3243 $ krótka $
Można również zapisać wszystkie instrukcje w jednym wierszu:
$ długa & średnia & krótka
[1] 3246
[2] 3247
$Analiza
Gdy uruchamiamy polecenie w tle, oznacza to tak naprawdę odłączenie klawiatury od strumienia wejściowego i udostępnienie przez powłokę wiersza poleceń do wykonania kolejnej instrukcji bez konieczności oczekiwania na zakończenie wcześniejszej. Wyniki ...
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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.