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From: vippstar on 9 Dec 2009 15:10 On Dec 9, 9:47 pm, t...(a)sevak.isi.edu (Thomas A. Russ) wrote: > vippstar <vipps...(a)gmail.com> writes: <snip> > > I could answer that > > no conforming NREVERSE implementation could have l2 a value different > > than (3 2 1) (2 1) (1). Isn't that also true? Also, isn't it true that > > l2 could never be (1 2 3)? But that'd be the case with the NREVERSE > > suggestion in the student example, which is why (1 2 3) for l2 isn't > > conforming. > > (1 2 3) for L2 is perfectly conforming. NREVERSE is not REQUIRED to > modify andy cons cells at all. I understand now, thanks. |