mirror of
https://github.com/krahets/hello-algo.git
synced 2024-12-26 12:26:29 +08:00
57 lines
1.1 KiB
Python
57 lines
1.1 KiB
Python
"""
|
|
File: linked_list.py
|
|
Created Time: 2021-12-11
|
|
Author: Krahets (krahets@163.com)
|
|
"""
|
|
|
|
class ListNode:
|
|
"""Definition for a singly-linked list node
|
|
"""
|
|
def __init__(self, val=0, next=None):
|
|
self.val = val
|
|
self.next = next
|
|
|
|
def list_to_linked_list(arr):
|
|
"""Generate a linked list with a list
|
|
|
|
Args:
|
|
arr ([type]): [description]
|
|
|
|
Returns:
|
|
[type]: [description]
|
|
"""
|
|
dum = head = ListNode(0)
|
|
for a in arr:
|
|
node = ListNode(a)
|
|
head.next = node
|
|
head = head.next
|
|
return dum.next
|
|
|
|
def linked_list_to_list(head):
|
|
"""Serialize a linked list into an array
|
|
|
|
Args:
|
|
head ([type]): [description]
|
|
|
|
Returns:
|
|
[type]: [description]
|
|
"""
|
|
arr = []
|
|
while head:
|
|
arr.append(head.val)
|
|
head = head.next
|
|
return arr
|
|
|
|
def get_list_node(head, val):
|
|
"""Get a list node with specific value from a linked list
|
|
|
|
Args:
|
|
head ([type]): [description]
|
|
val ([type]): [description]
|
|
|
|
Returns:
|
|
[type]: [description]
|
|
"""
|
|
while head and head.val != val:
|
|
head = head.next
|
|
return head
|