Clarify description of keep
counter)
(defn keep
- `Given a predicate, take only elements from an array or tuple for
- which (pred element) is truthy. Returns a new array of truthy predicate results.`
+ ``Given a predicate `pred`, return a new array containing the truthy results
+ of applying `pred` to each element in the indexed collection `ind`. This is
+ different to `filter` which returns an array of the original elements where
+ the predicate is truthy.``
[pred ind]
(def res @[])
(each item ind
