gistfile1.rb

1.9.3p286 :001 > class MyClass
1.9.3p286 :002?>   attr_accessor :name
1.9.3p286 :003?>   end
 => nil 
1.9.3p286 :004 > hash = {}
 => {} 
1.9.3p286 :005 > me = MyClass.new
 => #<MyClass:0x00000001f83bc0> 
1.9.3p286 :006 > hash.store me.to_s, me
 => #<MyClass:0x00000001f83bc0> 
1.9.3p286 :007 > hash.each_pair {|k,v| puts "#{k}'s name is #{v.name}"}
#<MyClass:0x00000001f83bc0>'s name is 
 => {"#<MyClass:0x00000001f83bc0>"=>#<MyClass:0x00000001f83bc0>} 
1.9.3p286 :008 > me.name = 'zak'
 => "zak" 
1.9.3p286 :010 > hash.each_pair {|k,v| puts "#{k}'s name is #{v.name}"}
#<MyClass:0x00000001f83bc0>'s name is zak
 => {"#<MyClass:0x00000001f83bc0>"=>#<MyClass:0x00000001f83bc0 @name="zak">}