From: Magicloud Magiclouds Date: 2007-07-17T14:56:08+09:00 Subject: What is the fastest way to convert a object? Dear all, Class Test def methodA puts(@var1) end def initialize @var1 = 0 end end obj = Object.new obj.instance_variable_set(:@var1, 2) # Now I want obj to be Test's instance, so I can obj.methodA # How to do this quickly? Thanks.