August 2012
Intermediate to advanced
624 pages
17h 11m
Polish
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8.1. Sortowanie danych wyjściowych
Problem
Chcemy wyświetlić dane wynikowe programu lub skryptu w określonym porządku, ale bez konieczności (ponownego) pisania własnej funkcji sortującej. Czy nie można skorzystać z gotowego rozwiązania?
Rozwiązanie
Można wykorzystać narzędzie sort. Polecenie to pozwala na sortowanie zawartości jednego pliku lub większej ich liczby, jeśli nazwy wspomnianych plików zostaną wymienione w wierszu polecenia:
$ sort plik1.txt plik2.txt kolejnyplik.xyzPominięcie nazw plików w wywołaniu instrukcji powoduje, że program sort oczekuje na dostarczenie danych za pośrednictwem standardowego strumienia wejściowego. To z kolei pozwala na zastosowanie go w potoku i przekazanie listingu wynikowego poprzedniego polecenia:
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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.