package owl-base

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package owl-base
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type 'a t

Type of a stack.

Basic functions
val make : unit -> 'a t

make () creates an empty stack.

val push : 'a t -> 'a -> unit

push stack x pushes x into stack.

val pop : 'a t -> 'a option

pop stack pops the top element in stack. It returns None if the stack is empty.

val peek : 'a t -> 'a option

peek stack returns the value of top element in stack but it does not remove the element from the stack. None is returned if the stack is empty.

val is_empty : 'a t -> bool

Returns true if the stack is empty, otherwise false.

val mem : 'a t -> 'a -> bool

mem stack x checks whether x exist in stack. The complexity is O(n) where n is the size of the stack.

val memq : 'a t -> 'a -> bool

Similar to mem but physical equality is used for comparing values.

val to_array : 'a t -> 'a array

to_array stack converts the elements in stack into an array.

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