clojure - Simplest way to ensure var is vector -

what "simplest"/shortest way ensure var vector? self-written like

(defn ensure-vector [x]   (if (vector? x)     x     (vector x))  (ensure-vector {:foo "bar"}) ;=> [{:foo "bar"}] 

but wonder if there core function this? many of them (seq, vec, vector, list) either fail on maps or apply.

i wonder best name function. box, singleton, unit, v, cast-vector, to-vector, ->vector, !vector, vector!, vec!?

i further wonder if other languages, haskell, have function built-in.

i think function want use when value collection vec turns collection vector. vector function receives items of resulting vector arguments, use when value neither vector or collection.

this possible approach:

(defn as-vector [x]   (cond     (vector? x) x     (sequential? x) (vec x)     :else (vector x)))  (map as-vector [[1] #{2 3} 1 {:a 1}]) 

i chose name function based on ones coercions protocol in clojure.java.io (as-file , as-url).