Pete Harlan wrote: > Lisp and Scheme are not functional languages. A functional languge is > one that doesn't support mutating data; Lisp and Scheme very much do.
I certainly agree about Lisp. With Scheme, it's a bit trickier, especially since the history is that Scheme was first invented to be a Lisp-like language for "programming with functions" using recursion, first-class functions, dynamic scoping, and continuations -- essentially Lisp with the most non-FP features thrown out, plus dynamic scoping and continuations, which were not features of Lisp, and are very common in modern functional languages. By today's standards, Scheme is certainly not a "pure" functional language, but whether it is an "impure" one, or not one at all, is not so easy to say. Opinions vary. Craig
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