August 2012
Intermediate to advanced
624 pages
17h 11m
Polish
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18.4. Podmiana wartości składających się z większej liczby słów
Problem
Składnia !!:s/a/b ogranicza operację podmiany wartości do poszczególnych słów. W jaki sposób można zatem zastąpić fragment instrukcji, który obejmuje więcej niż jedno słowo?
Rozwiązanie
Należy wykorzystać mechanizm podmiany wartości definiowany za pomocą znaku (^):
$ /usr/bin/gdzieś/jakiśprogram -g -A -yknot -w /tmp/długanazwapliku ... $ ^-g -A^-gB^ /usr/bin/gdzieś/jakiśprogram -gB -yknot -w /tmp/długanazwapliku
Oczywiście, zawsze można użyć klawisza strzałki w górę, ale w przypadku długich poleceń i pracy zdalnej przedstawione rozwiązanie często okazuje się korzystniejsze.
Analiza
Instrukcja podmiany fragmentu polecenia rozpoczyna się od znaku (^), za którym wpisywany jest fragment ...
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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.