May 2007
Beginner
255 pages
6h 44m
English
Content preview from Learning RubyBecome 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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Appendix B. Answers to Review Questions
Chapter 1 Review Questions
What is the nickname of the inventor of Ruby? Matz
Ruby came out in 1995. What other programming language was released to the public that year? Java
Is everyone who writes a programming book morally or otherwise obligated to write a “Hello, World!” program? No!
What does the abbreviation irb stand for? Interactive Ruby, the line-oriented Ruby sandbox
What is Ruby’s killer app? Ruby on Rails
What is the name of the funny book on Ruby? why’s (poignant) guide to Ruby
Who wrote the pickaxe book? Dave Thomas
What’s one of the author’s favorite programming environments on the Mac? TextMate
Chapter 2 Review Questions
What is one of the main differences between a class and a module? You can instantiate a class, but not a module
What module does the
Objectclass include? KernelWhat syntax do you use to form block comments? =begin/=end
What special character begins an instance variable? A class variable? A global variable? @, @@, $
What is the main feature that distinguishes a constant? A constant must begin with an uppercase letter
When a method ends with a
?, what does that signify by convention? Returns true or falseA block is a sort of nameless _____________. Method or function
What is a proc? A stored procedure, with context
What is the most important characteristic of a symbol? It occupies a single memory location
What is RDoc? The Ruby documentation tool
Chapter 3 Review Questions
Why is
case/whensomewhat more convenient thanif/elsif ...
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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.