code snippet for ruby workshop

rb_workshop.rb

# Everything in Ruby is - Object
class People

  attr_accessor :name, :gender, :race, :nationality

  def initialize(name='', gender='', race='', nationality='')
    @name = name
    @gender = gender
    @race = race
    @nationality = nationality
  end

end

 person = People.new
 person.name = "Zhang San"
 person.gender = 'Male'
 person.race = 'yellow'
 person.nationality = 'China'
 puts person.inspect
 person.class.class.superclass.superclass

# Open For Change
person = People.new

def person.chef
  puts "good"
end

class People
  def play
    puts "FIFA is great!!!"
  end
end

 person.chef
 person.play

#Connect with Messages
class People
 def public_method
   puts "I am public!"
 end

 private
 def private_method
   puts "I am private!"
 end
end

 person = People.new
 person.public_method
 person.private_method
 person.send(:private_method)

# Module
module Interest
  def kickball
    puts  "i like kicking ball"
  end

  def read
    puts  "i like reading books"
  end

  def dota
    puts  "i like playing dota"
  end
end

class People
  include Interest
end

 person.read
 person.dota
#

#Inheritance
class InterestPeople < People
  def dota
    puts  "i like playing dota"
  end
end

 person.dota

# Flow Control
word = 'world'

if word
  puts "hello #{word}"
end

puts "hello #{word}" if word

$i = 0;
$num = 5;

while @i < num  do
   puts("Inside the loop i = #@i" )
   @i +=1
end

until $i > $num  do
   puts("Inside the loop i = #$i" )
   $i +=1
end


## Two types of block
[1, 2, 3].each do |i|
  puts i
end


[1,2,3].each  { |i| puts i }


## Yield
def my_method
  puts "reached the top"
  yield
  puts "reached the bottom"
end

my_method do
  puts "reached yield"
end