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我無法理解和實現雙鏈表。我可以掌握鏈接列表的大部分概念。這是我的代碼到目前爲止(在Python中)排序雙鏈表Python
*這是一個純粹的學術活動。我通常會使用列表和字典。
class DoublyNode(object):
"""A node of the SortedDoublyLL object.
DoublyNode(item, next=None, previous=None) -> a new DoublyNode with data as
its data, and next and previous as its neighbors."""
def __init__(self, data, next = None, previous = None):
"""Make a new DoublyNode from item, pointing to next and previous."""
self.data = data
self.next = next
self.previous = previous
class SortedDoublyLL(object):
"""A Sorted Doubly Linked List.
SortedDoublyLL() -> new SortedDoublyLL list that is empty
SortedDoublyLL(sequence) -> a SortedDoublyLL initialized from sequence's
items.
"""
def __init__(self, sequence = []):
"""Make a new SortedDoublyLL from the elements of sequence."""
if len(sequence) == 0:
self.head = None
self.tail = None
else:
cur_node = None
prev_node = None
sequence.sort()
sequence.reverse()
for element in sequence:
prev_node = cur_node
cur_node = DoublyNode(element, cur_node, prev_node)
self.head = cur_node
self.tail = DoublyNode(sequence[0])
我想你最好先設置一個元素的鏈接列表,然後使用插入算法找到插入其他元素的正確位置。如果你想保持簡單,最初。 – 2011-01-06 02:38:00
你的問題是什麼? – 2011-01-06 07:08:52