From: kendear <summercoolness@...>
Date: 2007-09-16T08:56:32+09:00
Subject: if i don't use @n but use n instead, there is no error

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in an instance method, if i didn't use @n but used n, the program still
runs...
and it is not changing the global n... so what is it changing?

Example:

n = 10

class Foo

  def initialize(i)
    @n = i
  end

  def change()
    puts
    puts "Inside of change!!!!!!!!!!!!!!!!"
    n = 111111            # intentionally not using @n
  end

  def print_it
    puts
    p "Printing Object"
    p @n
  end

end



foo = Foo.new(3)
foo.print_it

foo.change
foo.print_it


puts
p "Global var"
p n
 -------- output ----------------------------------------------------------

C:\rails\depot>ruby test_class01.rb

"Printing Object"
3

Inside of change!!!!!!!!!!!!!!!!

"Printing Object"
3

"Global var"
10

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