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Ruby Basic Tutorial

Ruby Basic Tutorial
Troubleshooters.Com, Code Corner and Ruby Revival Present Ruby Basic Tutorial Copyright (C) 2005 by Steve Litt Note: All materials in Ruby Revival are provided AS IS. By reading the materials in Ruby Revival you are agreeing to assume all risks involved in the use of the materials, and you are agreeing to absolve the authors, owners, and anyone else involved with Python Patrol of any responsibility for the outcome of any use of these materials, even in the case of errors and/or omissions in the materials. If you do not agree to this, you must not read these materials. To the 99.9% of you honest readers who take responsibility for your own actions, I'm truly sorry it is necessary to subject all readers to the above disclaimer. CONTENTS This is a Ruby tutorial for one not knowing Ruby. Ruby can be used as a fully object oriented language, in which case you'd create classes and objects to accomplish everything. This is the simplest possible Ruby program, hello.rb. Let's count to 10... Retry

Język programowania Ruby Ruby in Twenty Minutes Introduction This is a small Ruby tutorial that should take no more than 20 minutes to complete. It makes the assumption that you already have Ruby installed. (If you do not have Ruby on your computer install it before you get started.) Interactive Ruby Ruby comes with a program that will show the results of any Ruby statements you feed it. Open up IRB (which stands for Interactive Ruby). If you’re using macOS open up Terminal and type irb, then hit enter. irb(main):001:0> Ok, so it’s open. Type this: "Hello World" irb(main):001:0> "Hello World" => "Hello World" Ruby Obeyed You! What just happened? irb(main):002:0> puts "Hello World" Hello World => nil puts is the basic command to print something out in Ruby. Your Free Calculator is Here Already, we have enough to use IRB as a basic calculator: irb(main):003:0> 3+2 => 5 Three plus two. irb(main):004:0> 3*2 => 6 Next, let’s try three squared: irb(main):005:0> 3**2 => 9 In Ruby ** is the way you say “to the power of”. Ok, wait, what was that last one?

Ruby in Twenty Minutes What if we want to say “Hello” a lot without getting our fingers all tired? We need to define a method! irb(main):010:0> def hiirb(main):011:1> puts "Hello World!"irb(main):012:1> end=> :hi The code def hi starts the definition of the method. The Brief, Repetitive Lives of a Method Now let’s try running that method a few times: irb(main):013:0> hiHello World! Well, that was easy. What if we want to say hello to one person, and not the whole world? irb(main):015:0> def hi(name)irb(main):016:1> puts "Hello #{name}!" So it works… but let’s take a second to see what’s going on here. Holding Spots in a String What’s the #{name} bit? irb(main):019:0> def hi(name = "World")irb(main):020:1> puts "Hello #{name.capitalize}!" A couple of other tricks to spot here. Evolving Into a Greeter What if we want a real greeter around, one that remembers your name and welcomes you and treats you always with respect. The new keyword here is class. So how do we get this Greeter class set in motion?

Ruby on Rails Guides Ruby Tutorial with Code Samples Ruby, Ruby on Rails, and _why: The disappearance of one of the world’s most beloved computer programmers Illustration by Charlie Powell. In March 2009, Golan Levin, the director of Carnegie Mellon University’s interdisciplinary STUDIO for Creative Inquiry, invited an enigmatic and famed computer programmer known to the virtual world only as “Why the Lucky Stiff” or “_why”—no, not a typo—to speak at a CMU conference called Art && Code—also not a typo—an event where artsy nerds and nerdy artists gather to talk shop. _why came to Pittsburgh and presented his latest project to a room full of a student programmers and artists. He was scruffily handsome, seemingly in his early- to mid-30s, with shaggy brown hair falling in his eyes and a constant half-smile. At this symposium, he wore a pair of oversize sunglasses and a tidy sports coat with a red pocket square, a silly riff on a stuffy professor’s outfit. He riffed on his nom d’Internet, Why the Lucky Stiff: “Some people want to call me Mr. Back in the old days, you could hack your Commodore 64 without too much trouble. Why? That’s it.

Ruby Z Wikibooks, biblioteki wolnych podręczników. Ruby to interpretowany, w pełni obiektowy język programowania stworzony przez Yukihiro Matsumoto (pseudonim Matz). W języku angielskim ruby oznacza rubin. Od roku 2003 lawinowo zdobywa nowych zwolenników, głównie za sprawą popularnego frameworku do tworzenia aplikacji webowych o nazwie Ruby on Rails, tworzonego przez grupę programistów pod kierownictwem Davida Heinemeiera Hanssona. W roku 2005 według statystyk sklepu Amazon dwie najpopularniejsze książki na temat Rubiego i Ruby on Rails były najlepiej sprzedawanymi pozycjami z kategorii Programowanie. Punktem wyjścia dla niniejszego podręcznika stała się książka Marka Slagella "Ruby's User Guide" udostępniona na licencji GNU Free Documentation License. Spis treści[edytuj] Podstawy[edytuj] Programowanie zorientowane obiektowo[edytuj] Licencja[edytuj] Licencja Zobacz też[edytuj] Linki zewnętrzne[edytuj]

Learn to Program, by Chris Pine A Place to Start for the Future Programmer I guess this all began back in 2002. I was thinking about teaching programming, and what a great language Ruby would be for learning how to program. Unfortunately, there wasn't much Ruby documentation geared for newbies at the time. And it wasn't very good. What saved me was that I made it really easy for people to contact me, and I always tried to help people when they got stuck. A couple of years later, it was getting pretty good. :-) So good, in fact, that I was ready to pronounce it finished, and move on to something else. It took me another year, but now I think it's really good, mostly because of the hundreds of brave souls who have helped me write it. What's here on this site is the original tutorial, more or less unchanged since 2004. Thoughts For Teachers There were a few guiding principles that I tried to stick to. Another principle I've kept in mind is to teach only one way to do something. About the Original Tutorial Acknowledgements

Ruby on Rails Tutorial: Learn Rails by Example book and screencasts by Michael Hartl Michael Hartl Contents Foreword My former company (CD Baby) was one of the first to loudly switch to Ruby on Rails, and then even more loudly switch back to PHP (Google me to read about the drama). Though I’ve worked my way through many Rails books, this is the one that finally made me “get” it. The linear narrative is such a great format. Enjoy! Derek Sivers (sivers.org) Founder, CD Baby Acknowledgments The Ruby on Rails Tutorial owes a lot to my previous Rails book, RailsSpace, and hence to my coauthor Aurelius Prochazka. I’d like to acknowledge a long list of Rubyists who have taught and inspired me over the years: David Heinemeier Hansson, Yehuda Katz, Carl Lerche, Jeremy Kemper, Xavier Noria, Ryan Bates, Geoffrey Grosenbach, Peter Cooper, Matt Aimonetti, Gregg Pollack, Wayne E. About the author Michael Hartl is the author of the Ruby on Rails Tutorial, the leading introduction to web development with Ruby on Rails. Copyright and license Welcome to the Ruby on Rails Tutorial.

Ruby Regular Expressions A regular expression is a special sequence of characters that helps you match or find other strings or sets of strings using a specialized syntax held in a pattern. A regular expression literal is a pattern between slashes or between arbitrary delimiters followed by %r as follows: Syntax: /pattern//pattern/im # option can be specified%r! Example: #! This will produce the following result: Line1 contains Cats Regular-expression modifiers: Regular expression literals may include an optional modifier to control various aspects of matching. Like string literals delimited with %Q, Ruby allows you to begin your regular expressions with %r followed by a delimiter of your choice. # Following matches a single slash character, no escape required%r|/| # Flag characters are allowed with this syntax, too%r[</(.*)>]i Regular-expression patterns: Except for control characters, (+ ? Following table lists the regular expression syntax that is available in Ruby. Regular-expression Examples: Literal characters: #!

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