Forgive this naive question, I am having some trouble understanding some
matching forms. If I wanted to filter out odd numbers like this:
(filter odd? '(1 2 3 4 5)) => '(1 3 5)
but I wanted to do this with a match:
(define (filter-odds v)
(match v
[empty empty]
[(cons (? odd? first) rest) (cons first (filter-odds rest))]
[_ (filter-odds rest)]))
(filter-odds '(1 2 3 4 5)) => '(1 2 3 4 5)
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