Re: Testing whether a list contains at least one non-nil element

[Emanuel Berg]

Jean Louis wrote:

>> I would like to test whether a list contains at least one
>> non-nil element? If I do that, then I would be able to
>> continue a loop where a non-nil element would mean that
>> a match was found.
>
> Here is the test for non nil element:
>
> (elt (delq nil (list nil nil)) 0) ⇒ nil
>
> (elt (delq nil (list nil 1)) 0) ⇒ 1

Interesting question ...

(cl-position-if (lambda (e) e) '(nil nil)) ; nil
(cl-position-if (lambda (e) e) '(nil 1))   ; 1

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