#!/usr/bin/ruby
 
$global_variable = 10
class Class1
 def print_global
   puts "Global variable in Class1 is #$global_variable"
 end
end
class Class2
 def print_global
   puts "Global variable in Class2 is #$global_variable"
 end
end
 
class1obj = Class1.new
class1obj.print_global
class2obj = Class2.new
class2obj.print_global

Global variable in Class1 is 10
Global variable in Class2 is 10

#!/usr/bin/ruby
 
class Customer
  def initialize(id, name, addr)
   @cust_id=id
   @cust_name=name
   @cust_addr=addr
  end
  def display_details()
   puts "Customer id #@cust_id"
   puts "Customer name #@cust_name"
   puts "Customer address #@cust_addr"
  end
end
 
# 创建对象
cust1=Customer.new("1", "John", "Wisdom Apartments, Ludhiya")
cust2=Customer.new("2", "Poul", "New Empire road, Khandala")
 
# 调用方法
cust1.display_details()
cust2.display_details()

Customer id 1
Customer name John
Customer address Wisdom Apartments, Ludhiya
Customer id 2
Customer name Poul
Customer address New Empire road, Khandala

#!/usr/bin/ruby
 
class Customer
  @@no_of_customers=0
  def initialize(id, name, addr)
   @cust_id=id
   @cust_name=name
   @cust_addr=addr
  end
  def display_details()
   puts "Customer id #@cust_id"
   puts "Customer name #@cust_name"
   puts "Customer address #@cust_addr"
  end
  def total_no_of_customers()
    @@no_of_customers += 1
    puts "Total number of customers: #@@no_of_customers"
  end
end
 
# 创建对象
cust1=Customer.new("1", "John", "Wisdom Apartments, Ludhiya")
cust2=Customer.new("2", "Poul", "New Empire road, Khandala")
 
# 调用方法
cust1.total_no_of_customers()
cust2.total_no_of_customers()

Total number of customers: 1
Total number of customers: 2

#!/usr/bin/ruby
 
class Example
  VAR1 = 100
  VAR2 = 200
  def show
    puts "Value of first Constant is #{VAR1}"
    puts "Value of second Constant is #{VAR2}"
  end
end
 
# 创建对象
object=Example.new()
object.show

Value of first Constant is 100
Value of second Constant is 200

123         # Fixnum 十进制
1_234        # Fixnum 带有下划线的十进制
-500         # 负的 Fixnum
0377         # 八进制
0xff         # 十六进制
0b1011        # 二进制
?a          # 'a' 的字符编码
?\n         # 换行符（0x0a）的编码
12345678901234567890 # Bignum

123.4        # 浮点值
1.0e6        # 科学记数法
4E20         # 不是必需的
4e+20        # 指数前的符号

#!/usr/bin/ruby -w
 
puts 'escape using "\\"';
puts 'That\'s right';

escape using "\"
That's right

#!/usr/bin/ruby -w
 
puts "Multiplication Value : #{24*60*60}";

Multiplication Value : 86400

#!/usr/bin/ruby
 
ary = [ "fred", 10, 3.14, "This is a string", "last element", ]
ary.each do |i|
  puts i
end

fred
10
3.14
This is a string
last element

#!/usr/bin/ruby
 
hsh = colors = { "red" => 0xf00, "green" => 0x0f0, "blue" => 0x00f }
hsh.each do |key, value|
  print key, " is ", value, "\n"
end

green is 240
red is 3840
blue is 15

#!/usr/bin/ruby
 
(10..15).each do |n|
  print n, ' '
end

10 11 12 13 14 15