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[Caml-list] Why is (@) written in O'Caml?
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| Date: | -- (:) |
| From: | Oleg <oleg_inconnu@m...> |
| Subject: | [Caml-list] Why is (@) written in O'Caml? |
let rec (@) l1 l2 =
match l1 with
[] -> l2
| hd :: tl -> hd :: (tl @ l2)
The O'Caml implementation of (@) is recursive and not tail-recursive. All one
really has to do during "append" is copy l1 and set the last element's CDR to
l2. I can see why this can not be done in O'Caml itself, but since (@) is
such a common operation, I'm wondering why it was decided to implement it
inefficently in O'Caml itself?
Cheers,
Oleg
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