From: "Bartosz DziewoƄski" Date: 2012-03-08T00:25:57+09:00 Subject: Re: Proc.new v. lambda Really, you could have checked it yourself. irb(main):001:0> a = Proc.new{} => # irb(main):002:0> b = lambda{} => # irb(main):003:0> a.lambda? => false irb(main):004:0> b.lambda? => true -- Matma Rex