From: "SHIGETOMI, Takuhiko" Date: 2005-09-27T14:19:29+09:00 Subject: [Q] how to cancel the 'extend' which once has done dear guys, is it possible to undo the 'extend' ? module X end class C end c = C.new p c.kind_of?(X) #=> false c.extend X p c.kind_of?(X) #=> true c.decommisson(X) # <- my pseudo instruction to undo the 'extend' p c.kind_of?(X) #=> false best regards, vscp://void/3d/universe/milky-way-galaxy/orion-arm/sol-solar-system/ 3rd-planet/fareast/jp/tky/shigetomi.takuhiko.5618