August 2012
Intermediate to advanced
624 pages
17h 11m
Polish
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15.8. Przeglądanie danych wynikowych w formacie szesnastkowym
Problem
Chcemy sprawdzić, czy w treści zestawienia wynikowego występują znaki odstępu lub znaki niedrukowalne. W tym celu listing musi zostać wyświetlony w formacie szesnastkowym.
Rozwiązanie
Zestawienie wynikowe powinno zostać przekazane za pomocą potoku do polecenia hexdump, wywoływanego z opcją –C:
$ hexdump -C plik
00000000 57 69 65 72 73 7a 20 31 2e 0a 57 69 65 72 73 7a |Wiersz 1..Wiersz|
00000010 20 32 2e 0a 0a 57 69 65 72 73 7a 20 34 2e 0a 57 | 2...Wiersz 4..W|
00000020 69 65 72 73 7a 20 35 2e 0a 0a |iersz 5...|
0000002aNa przykład wykonanie polecenia nl powoduje dodanie znaków spacji (kod ASCII 20), numeru wiersza oraz znaku tabulatora (kod ASCII 9):
$ nl -ba plik | hexdump -C 00000000 ...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.
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.