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KON’NICHI WA, RUBYAn introduction to Ruby with an appearance by Sinatra
Monday, September 27, 2010
Speaker.new({ :name => "Scotty Motte", :twitter => "@spitfiresky", :email => "[email protected]"})
Monday, September 27, 2010
ABOUT RUBY
• Created by Matz - he’s from Japan!
•Written for humans not for computers
• Easy to read and write
• 5.times { puts “Arigato Matz! Have some chunky bacon!”}
• [‘riverside’, ‘japan’, ‘america’].each { |locale| puts locale.capitalize }
• Popularized by Ruby on Rails
Monday, September 27, 2010
INSTALLATION
•Mac Users, I say rejoice, for thou haveth Ruby already!
•Windows users - are you prejudiced towards Japan or something?! Let’s fix that by installing Ruby:
• http://rubyinstaller.org/ - follow the default installation steps and you are good to go. It will install to your programs directory.
Monday, September 27, 2010
IRB IS THE WORD
• irb - Interactive Ruby Console. The best way to tryout and learn Ruby.
• Comes packaged with your Ruby Install
• To Use:
• Mac: open up command line and type: irb
• Windows: open up Interactive Ruby program
Monday, September 27, 2010
IRB EXAMPLES
3.times { puts "da" }
["paris", "france", "napoleon"].each { |name| puts name.capitalize }
def say_hi_to(name) puts "Please to meet you, #{name}!"endsay_hi_to("Mr. President")
cost = 100tax = 8.25total = cost + taxputs total
Monday, September 27, 2010
EVERYTHING IS AN OBJECT
1.class # => Fixnum'a'.class # => String:z.class # => Symbol
class Foo # something hereendFoo.class # => ClassFoo.new.class # => Foo
Monday, September 27, 2010
DYNAMICALLY TYPED
def foo(bar) bar * 2end
foo(1) # => 2foo("a") # => "aa"
Basically, this means you don’t have to define things as integer or string before runtime.
Monday, September 27, 2010
DUCK TYPINGIf it looks like a duck, walks, like a duck, and quacks like a duck, then it’s probably a duck.
"a".respond_to? :size # => true1.respond_to? :+ # => true1.respond_to? :inject # => false
Monday, September 27, 2010
MORE EXAMPLES OF RUBYStringsname = 'Riverside'"Hello, #{name}!"
Methodsstr = "Hello, Riverside"str.size # => 16str.sub("Riverside", "World") # => "Hello, World!"
Numbers1 + 9 # => 10
Arrays[1, 2, 3] # => [1, 2, 3]
Monday, September 27, 2010
MORE EXAMPLES OF RUBY
Hashesoptions = {:name => "Riverside", :state => "CA"}
Iterators[1,2,3].each {|n| puts n} # => 1 2 3
If/Elsesif something == 2 # do somethingelsif something == 1 # do somethingelse # do somthing elseend
Monday, September 27, 2010
ENTER SINATRA
• Sinatra is a web framework built on top of Ruby. It’s kinda like Rails, but much lighter. You use it to build websites with Ruby.
• [sudo] gem install sinatra
• Gems are just a cool word for ‘libraries’ in the Ruby world. They contain packaged up code that do cool things. Rails is a gem, Sinatra is a gem, and nokogiri is a gem. You can find gems at http://rubygems.org
Monday, September 27, 2010
PUT THIS IN YOUR PIPE
Monday, September 27, 2010
AND SMOKE IT
Monday, September 27, 2010
AND BLOW SMOKE RINGS
Monday, September 27, 2010
RESOURCES
• Ruby-Lang Homepage - http://www.ruby-lang.org/en/
• Windows Installer - http://rubyinstaller.org
• Ruby Gems - http://rubygems.org
• Sinatra - http://sinatrarb.com
• E-Text Editor (windows users) - http://www.e-texteditor.com/
• Textmate (mac users) - http://macromates.com/
• Why’s Poignant Guide to Ruby - http://mislav.uniqpath.com/poignant-guide/
Monday, September 27, 2010
