From: tamouse mailing lists <tamouse.lists@...>
Date: 2013-02-28T07:39:07+09:00
Subject: Re: Object track llist for a particular class.

Maybe:

local_variables.select{|k| eval(k.to_s).is_a?(Test) }

?

irb(main):001:0> class Test
                   end
nil
irb(main):003:0> a = Test.new
#<Test:0x93f0b0c>
irb(main):004:0> b = Test.new
#<Test:0x93ecfc0>
irb(main):005:0> c = String.new
""
irb(main):006:0> d = Array.new
[]
irb(main):007:0> local_variables.select{|k| eval(k.to_s).is_a?(Test) }
[:b, :a]