Alex Baranosky <[email protected]> writes:
> So for the case I had that method worked. I wonder though if I had
> wanted to sort by multiple keys, with some of the keys sorting in
> reverse order and others in regular order, how I could do that... Say
> last name ascending, date of
> birth descending for example.
Write your own compare function which does that. For example, for the
general case:
(def asc compare)
(def desc #(compare %2 %1))
(defn compare-by [[k comp & more] x y]
(let [result (comp (k x) (k y))]
(if (and (zero? result) (seq more))
(recur more x y)
result)))
(sort #(compare-by [:last-name asc, :date-of-birth desc] %1 %2) coll)
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