user=> (seq '()) nil user=> (seq '(1)) (1) user=> (seq "") nil user=> (seq "abc") (\a \b \c)
user=> (seq '()) nil user=> (seq '(1)) (1) user=> (seq "") nil user=> (seq "abc") (\a \b \c)
(seq '()) ; => nil (seq '(1)) ; => (1) (seq "") ; => nil (seq "abc") ; => (\a \b \c)
(seq '()) ; => nil (seq '(1)) ; => (1) (seq "abc") ; => (\a \b \c)