module type S1_phantom_invariant = sig .. end
type ('a, 'phantom) t
val mem : ?equal:('a -> 'a -> bool) ->
('a, 'b) t -> 'a -> bool
Checks whether the provided element is there, using polymorphic compare if equal
is not provided
val length : ('a, 'b) t -> int
val is_empty : ('a, 'b) t -> bool
val iter : ('a, 'b) t -> f:('a -> unit) -> unit
val fold : ('a, 'b) t ->
init:'accum -> f:('accum -> 'a -> 'accum) -> 'accum
fold t ~init ~f returns f (... f (f (f init e1) e2) e3 ...) en, where e1..en
are the elements of t
val exists : ('a, 'b) t -> f:('a -> bool) -> bool
Returns true if and only if there exists an element for which the provided
function evaluates to true. This is a short-circuiting operation.
val for_all : ('a, 'b) t -> f:('a -> bool) -> bool
Returns true if and only if the provided function evaluates to true for all
elements. This is a short-circuiting operation.
val count : ('a, 'b) t -> f:('a -> bool) -> int
Returns the number of elements for which the provided function evaluates to true.
val find : ('a, 'b) t -> f:('a -> bool) -> 'a option
Returns as an option the first element for which f evaluates to true.
val find_map : ('a, 'c) t -> f:('a -> 'b option) -> 'b option
Returns the first evaluation of f that returns Some, and returns None if there
is no such element.
val to_list : ('a, 'b) t -> 'a list
val to_array : ('a, 'b) t -> 'a array