counts number in a list

[Ehsan]

Hi every one

I need a function count numbers in a list for example
(count-numbers '(3 4 5 a b c d 6 ) ) -> 4

[Goheeca]

You can use the loop macro (search for a count clause) with a numberp predicate.

[nuntius]

let, dolist, incf, and numberp would also work.

A recursive helper function could be used to eliminate the let, dolist, and incf; some classes prefer recursive solutions.

[Ehsan]

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