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bug#4136: 23.1; delete-pair
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From: |
Drew Adams |
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Subject: |
bug#4136: 23.1; delete-pair |
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Date: |
Mon, 16 Nov 2020 13:37:09 -0800 (PST) |
> The closest function that I found is:
>
> (cl-plusp NUMBER)
> Return t if NUMBER is positive.
>
> but I'm not sure why it would be better than using just (> number 0).
It's there to emulate a Common Lisp predicate, `plusp'.
Why does Common Lisp have `plusp'? Presumably for
use with higher-order functions, to not have to use
a lambda form etc.
(mapcar #'plusp '(4 -3.1 0 42))
(mapcar (lambda (x) (> x 0)) '(4 -3.1 0 42))