seq

attempts to convert form to a sequence

Attempt to convert the provided form to a sequence if it isn’t already. If the form cannot be converted, or if the resulting sequence is empty, the empty list will be returned.

An Example

(when-let [s (seq "hello")]
  (seq->vector (map (lambda (x) (str x "-")) s)))

This example will return [“h-” “e-” “l-” “l-” “o-”].