Introduction to Ruby on Rails talk that I gave a local .NET users group meeting.

1. Intro to Ruby and Rails
Jon Homan

2. Agenda
●
Ruby
●
General Properties
●
Syntax Examples
●
Rules to Remember
●
Rails
●
Philosophy
●
Resources

3. Ruby

4. General Properties
●
Dynamic
●
Interpreted
●
Focus
●
Simplicity
●
Productivity
●
Developer Happiness
●
Principle of Least Surprise

5. Consistent API
Adapted from Brian Hogan's Intro to Ruby talk
● ”Jon”.length
● [”jon”, ”homan”, ”ruby”, ”rails”].length
● {'a' => 1, 'b' => 2}.length
● User.find_all().length

6. Syntax Examples
Interactive Ruby (irb)

7. Rules to Remember
Adapted from ”Intro to Ruby”

8. Rules to Remeber
1. Everything is an object
25.class #Fixnum
”jon”.class #String

9. Rules to Remember
2. Everything is true except nil or false
n = 1
puts n if n #1
n = nil
puts n if n #nil
n = false
puts n if n #nil

10. Rules to Remember
3. Variables are dynamically typed, but data is
strongly typed
name = ”Jon”
number = 42
puts name + number
#TypeError: can't convert Fixnum into String
puts name + number.to_s
#Jon42

11. Rules to Remember
4. Every method implicity returns the last statement
def message
if user
”Welcome!”
else
”You need to log in”
end
end

12. Rules to Remember
5. Classes are objects
Wrong
person = new Person
Correct
person = Person.new

13. Rails

14. Philosophy
●
Convention over Configuration
●
DRY
●
REST

15. Overview
●
MVC
●
TATFT
●
Developer Happiness and Productivity
●
“Opinionated Software”
●
Full stack

16. Out of the Box
●
WEBrick – simple web server
●
Rake – build system
●
Scaffolding – CRUD operations
●
Prototype and Script.aculo.us
●
Libraries through rubygems

17. Event Registration

18. Resources
Brian Hogan's talk: http://tinyurl.com/introruby
Rails Guides: http://guides.rubyonrails.org/
C# vs. Ruby: http://tinyurl.com/c­vsruby
Railscasts: http://railscasts.com/
IronRuby: http://ironruby.net/
Ruby from X Lang: http://tinyurl.com/rubyfromx