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