From: ts <decoux@...>
Date: 2002-03-14T20:32:47+09:00
Subject: Re: Newbie  -- Please help!!

>>>>> "F" == "Firestone, Mark <- Technical Support" <mark.firestone@gossgraphic.co.uk>> writes:

F> It works... but I had to use a Global Varible to make it work.  That
F> MUST be wrong.

 Why ? there is nothing wrong with global variable when you write a small
 script. Look, for example, in the distribution of ruby and you'll see that
 for some scripts global variables are sometimes used.

F> class User

[...]

F>  def name
F>    @name
F>  end
 
F>  def password
F>    @password
F>  end

 It's best to write it

     attr_reader :name, :password
 
F>  def show

F>   print "User: #@name #@phone #@citystate #@address #@password\n"
F>  end
 
F> end

F> class User_list

F>   include Enumerable 
  
F>   def initialize
F>     @users = Array.new
F>   end

 Well here manifestly you want to manage it like an Array, just make
 User_list inherit from Array and redefine the methods that you want

 Something like this

pigeon% cat b.rb
#!/usr/bin/ruby
class User

   def initialize(name,phone,citystate,address,password)
      @deleted = FALSE
      @locked  = TRUE
      @name   = name
      @alais    = ''
      @alaisOn = FALSE
      @phone   = phone
      @citystate = citystate
      @address  = address
      @password = password
      @width = 80
   end

   attr_reader :name, :password

   def show
      puts "User: #@name #@phone #@citystate #@address #@password\n"
   end
 
end

class User_list < Array
   def self.loadusers(file = "users.dat")
      list = nil
      File.open(file) do |f|  
         list = Marshal.load(f)  
         print "- Loading User Object...\n"
      end  
      list
   end
 
   def saveusers(file = "users.dat", mode = "w")
      File.open(file, mode) do |f|
         Marshal.dump(self, f)
      end
      print "- Saving User Object...\n"
   end

   def [](key)
      if key.kind_of?(Integer)
         result = self[key]
      else
         result = find { |user| key == user.name }
      end
   end

   def checkpassword (username,password)
      result = FALSE
      if self[username] != nil
         if self[username].password == password 
            result = TRUE
         end
      else
         print "You passed me a bad user -- ass-munch!\n"
      end
      return result
   end
 
end
 
list = User_list.new
list << User.new('SYSOP','000-000-0000','Tempe, AZ',
                 '600 E. Solana Drive','STUPID')
list << User.new('TEST','000-000-0000','Mesa, AZ',
                 '123 Sample Street','HAPPY')
list.each {|l| l.show }
print list.checkpassword('SYSOP','STUPID')
print list.checkpassword('SYSOP2','PASSWORD')
list.saveusers
pigeon% 



Guy Decoux