| From: Matthew Flatt (mflatt at cs.utah.edu) Date: Tue Jul 29 11:10:52 EDT 2008 |
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At Tue, 29 Jul 2008 01:47:34 -0400, David Van Horn wrote: > Car operates on pairs, while first operates only on lists. To be clear, this was a v4.0 change. In previous versions, `first' was a synonym for `car' in all of our languages. In v4.0, we decided to take advantage of constant-time `list?' and make `first' and `rest' insist on list arguments. Matthew
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