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From: "B. Pym" <Nobody447095@here-nor-there.org>
Newsgroups: comp.lang.lisp,comp.lang.scheme
Subject: map instead of loop
Date: Thu, 3 Jul 2025 22:28:57 -0000 (UTC)
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Pascal Costanza wrote:

> Besides trying to figure out what's more idiomatic, it is also
> (more?) important to note that one of the two expressions traverse
> the list once while the other traverses it twice. Traversing a
> list more often than necessary leads to less efficient code, which
> may or may not matter.
> 
> Apart from that, I tend to prefer LOOP:
> 
> (loop for i in list
>        collect (foo (bar i)))

Gauche Scheme (using function composition)

(map (.$ foo bar) List)