foo.clj

;; example vector
(def test-vec [["1" "foo"]["2" "bar"]])

;; via reduce, the verbose way
(reduce (fn [acc i] (assoc acc (first i) (second i))) {} test-vec)

;; also via reduce, the terse way
(reduce conj {} test-vec)
  
;; via a handy built-in
(into {} test-vec)