CS计算机代考程序代写 val contains_elem: ‘a list -> ‘a -> bool

val contains_elem: ‘a list -> ‘a -> bool
val is_present: ‘a list -> ‘a -> int list
val count_occ : ‘a list -> ‘a -> int
val uniq : ‘a list -> ‘a list
val assoc_list : ‘a list -> (‘a * int) list
val ap : (‘a -> ‘b) list -> ‘a list -> ‘b list