Re: Better way to make sure external command exists in the system?

[Jean Louis]

* Emanuel Berg via Users list for the GNU Emacs text editor 
<help-gnu-emacs@gnu.org> [2021-03-25 23:49]:
> Use a set function
> 
>   (cl-map 'list #'number-to-string '(1 2 3)) ; ("1" "2" "3")

But why use Emacs Lisp CL library and complexer Common Lisp style
when it works this way simpler:

(mapcar #'number-to-string '(1 2 3)) → ("1" "2" "3")

Any reason?

Then if I am to use some function defined in Emacs Lisp, then I
would rather use this one, instead of `cl-map', as it is simpler,
it will recognize the sequence.

(seq-map #'number-to-string '(1 2 3)) → ("1" "2" "3")