How can I find the index of the smallest member of this vector in Clojure?

Question

I have used the following expression to retrieve the index of the smallest number in a vector. However, I would like to avoid the use of .indexOf (for efficiency reasons and maybe numeric precision, although I guess the numbers are implicitly converted to strings).

(.indexOf [1 2 3 4 0 5]
  (reduce #(if (< %1 %2) %1 %2) [1 2 3 4 0 5] ))

Would it be possible to do it differently using reduce?

Answer 1

user=> (first (apply min-key second (map-indexed vector [1 2 4 0 5])))
3