If the collection is empty, the function throws an exception of type RW BoundsErr . Returns the number of elements in self. Inserts all elements of vec into self, preserving sorted order. Returns the number of items inserted. Returns rwnil if there is no such element.
Returns rwnil if there is no such element.
Returns the number of items removed. Returns the number of items removed. Removes and returns the item at position i in self. This position must be between zero and one less then the number of entries in the collection, otherwise the function throws an exception of type RW BoundsErr . Removes and returns the first item in the collection.