From: 7stud -- <bbxx789_05ss@...>
Date: 2007-11-10T04:51:08+09:00
Subject: Re: singleton is this easy?

Thufir wrote:
> Is this all that's required to ensure that there's ever only one
> instance of an ArrayOfCreatures?  Seems too easy!
> 

Implementing a singleton class by hand is easy too, so you aren't 
getting much savings using the Singleton module--you save yourself from 
having to write 4 extra lines of code.

If I have a method with 200 lines of code in it, and I put the method in 
its own module Calculations,  I can perform the complicated calculation 
by writing:

require 'calculations'
result = my_meth(10, 20, 3.5)

That's pretty easy too, isn't it?

On a side note: when you ask questions, you want to make it as easy as 
possible for people to answer your questions, right?  Posting code 
without indentation is bad form because it makes your code harder to 
read.  Some people won't even bother with your questions if you can't be 
bothered with posting indented code.  In Ruby, the recommended style is 
to use 2 spaces for indenting.  Your code would look look something like 
this:

require 'singleton'

class ArrayOfCreatures < Array
  include Singleton

  def toString
    print "\n\n\nArrayOfCreatures\n"
    print "================\n\n"

    i=0
    while i < self.length
      print "\n\n"
      print i
      print ":\n"
      print self[i].toString
      i=i+1
    end

  end
end

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