little interdiction about ruby & rails

1. MEET RUBY

2. AGENDA
• Introduction
• Code basic
• A sample DEMO in RoR
• RUBY ON RAILS COMMUNITY

3. INTRODUCTION

4. THE CREATOR.

5. THE CREATOR SAY

6. Hello ruby world

7. THE CREATOR SAY

8. THE CREATOR SAY

9. CODE BASIC

10. CODE EXAMPLE
5.times { print "hello world!"}
# hello world!hello world!hello world!hello world!hello world!
if "text".include? "ex"
puts "match"
end
#match
puts "no match" unless "text".include? "ttt"
#no match

11. CODE EXAMPLE
# this is a coment
# a = b -c
a = b + c # comment at the end
=begin
def my_method
..
end
=end

12. CODE EXAMPLE
#Variable Declaration:
a_string = "hello!"
a_float = 3.5
a_int = 3
#Funcation Declaration:
def do_something(a_string , a_int)
puts a_string * 3
puts a_int * 3
end tw-hollychung1:myarch masato$ ruby test.rb
hello!hello!hello!
9

13. Language Basics: Strings

14. Language Basics: Strings

15. Language Basics: Hashes

16. Language Basics: Arrays

17. Give me some sugar: Array

18. Control Structures

19. Control Structures2
File.open(“a.txt”,”r”).each_line{|l|
puts l
}
nums = [1,7,6,3,4]
nums.sort{|a,b|
a <=> b
}
hashs = { "Jane Doe" => 10, "Jim Doe" => 6 , “Masato” => 9}
hashs.map{|k,v|
p v
}

20. PRATTEN MATCH
name , id , company =["Masato","999","RUBYLIST"]
p name => "Masato"
p id => "999"
p company => "RUBYLIST"

21. Language Basics: Classes

22. Language Basics: Classes
• Classes are always open (even built in classes)

23. Language Basics: Inheritance
• Single Inheritance
▫ But mixins are available (= Interface with
implemented methods)

24. Language Basics: Mixin Example

25. The ruby world

26. Libraries - Rubygems
require ‘lib/my_module.rb’
gem search
gem install
gem update
gem push

27. A SAMPLE DEMO IN ROR
demo sample

28. RUBY ON RAILS COMMUNITY

30. RAILS EVENT IN TAIPIE

33. Q&A?

34. THANK YOU!