(has? coll key)
  coll: any type
  key: any type
  returns a bool
F

Returns #t if a collection contains a particular item.

coll may belong to any type, but if it's something other than an array, string, table, object or class, this function always returns #f.

(prn (has? '(a b c) -1)) ; prints #t
(prn (has? '(a b c) 4)) ; prints #f
(prn (has? '(a b c) 'key)) ; prints #f
(prn (has? 'symbol 2)) ; prints #f
access=
remove!