Some programmers like to start off a linked list with a dummy node that's always empty.
Some programmers like to start off a linked list with a dummy node that's always empty.
有些程序员喜欢以一个总是为空的哑元节点（即不表示实际数据的节点）作为一个链表的开始节点。
Some programmers like to start off a linked list with a dummy node that's always empty.
有些程序员喜欢以一个总是为空的哑元节点（即不表示实际数据的节点）作为一个链表的开始节点。