Devious! The OP wanted to handle underflow of the subs collection
though, so you need a tweak:
(apply assoc v (interleave (positions nil? v)
(concat subs (repeat nil))))
On Aug 17, 1:10 pm, Justin Kramer <jkkra...@gmail.com> wrote:
> With the precondition that the first collection is a vector:
>
> (use '[clojure.contrib.seq-utils :only [positions]])
>
> (defn nil-coalesce [v subs]
> (apply assoc v (interleave (positions nil? v) subs)))
>
> Justin
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