> Doubly-linked lists have problems with concurrent mutability, FYI. So do arrays, FYI. > It's really better to aim for non-circularity and to avoid the need

> Doubly-linked lists have problems with concurrent mutability, FYI. So do arrays, FYI. > It's really better to aim for non-circularity and to avoid the need for locks. How does an array avoid the need for a lock where a linked list needs one?