November 2012
Intermediate to advanced
888 pages
54h 46m
Polish
Content preview from Ruby. Receptury
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12.9. Generowanie i przetwarzanie arkuszy Excela
Problem
W programie trzeba przetworzyć dane z arkusza MS Excel bądź wygenerować nowy arkusz.
Rozwiązanie
Pliki MS Excel można generować za pomocą biblioteki spreadsheet, dostępnej w postaci zewnętrznego gemu (informacje dotyczące lokalizacji, z której można go pobrać, znajdują się w punkcie „Patrz także” poniżej). Posługując się tym gemem, można tworzyć proste arkusze Excela. W czasie, gdy piszemy tę książkę, gem spreadsheet-excel nie obsługuje formuł ani rozbudowanych arkuszy (limit rozmiaru wynosi siedem megabajtów).
Poniższy kod tworzy arkusz Excela zawierający kilka losowych liczb wraz z podsumowaniami i zapisuje go na dysku.
require 'rubygems' require 'spreadsheet/excel' SUM_SPREADSHEET ...
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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.