BList

Convenient method, equivalent to prepend

Convenient method, equivalent to append

Add an element to the tail

Add several elements to the tail

Convenient methods for retrieving elements

Delete the first n elements

Delete n elements at the end of the list

Does the element that meets the condition exist

Filter elements to obtain a read-only sublist

Find the index of the first element that meets the condition, and return -1 if it does not exist

Retrieve elements based on subscripts

Return list header element

The list obtained after removing the end element is in read-only mode

Insert an element at the index position

Insert multiple elements at index position

Is the current list empty

Return the element at the end of the list

name

Insert an element into the head

Insert multiple elements into the head

Delete an element

Delete multiple elements

Invert the list, and the obtained inverse list is in read-only mode

Update element

List slicing operation, obtaining a sub list in read-only mode

The list obtained after removing the header element is in read-only mode

Get the first n elements, and the obtained sublist is read-only

Obtain the last n elements, and the obtained sublist is read-only

A convenient method for updating elements, equivalent to set

return a collection iterator object.

the elements number of current collection.