November 2012
Intermediate to advanced
888 pages
54h 46m
Polish
Content preview from Ruby. Receptury
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21.7. Określenie rozmiaru terminala
Problem
Chcemy znaleźć rozmiar terminala w aplikacji terminalowej — liczbę wierszy i kolumn dostępnych do wyświetlania.
Rozwiązanie
W przypadku wykorzystania biblioteki Curses operacja ta nie jest trudna. W poniższym przykładzie wykorzystano metodę opakowującą Curses.program opisaną w „21.5. Konfiguracja i porządkowanie po programie wykorzystującym bibliotekę Curses”:
Curses.program do |scr|
max_y, max_x = scr.maxy, scr.maxx
scr.setpos(0, 0)
scr.addstr("Rozmiar terminala wynosi #{max_x}x#{max_y}. Naciśnij dowolny klawisz,
aby zakończyć pracę.")
scr.getch
end
W przypadku wykorzystania biblioteki Ncurses wykonanie tego zadania jest nieco trudniejsze: należy przekazać dwie tablice do odpowiednich bibliotek ...
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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.