Return a seq of all but the last item in coll, in linear time
Source
(def
^{:arglists '([coll])
:doc "Return a seq of all but the last item in coll, in linear time"
:added "1.0"
:static true}
butlast(fn ^:static butlast[s](loop[ret[]ss](if(nexts)(recur(conjret(firsts))(nexts))(seqret)))))