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46 lines
1.3 KiB
Python
46 lines
1.3 KiB
Python
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"""
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File: linear_search.py
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Created Time: 2022-11-26
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Author: timi (xisunyy@163.com)
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"""
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import sys
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from pathlib import Path
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sys.path.append(str(Path(__file__).parent.parent))
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from modules import ListNode, list_to_linked_list
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def linear_search_array(nums: list[int], target: int) -> int:
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"""Linear search (array)"""
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# Traverse array
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for i in range(len(nums)):
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if nums[i] == target: # Found the target element, thus return its index
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return i
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return -1 # Did not find the target element, thus return -1
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def linear_search_linkedlist(head: ListNode, target: int) -> ListNode | None:
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"""Linear search (linked list)"""
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# Traverse the list
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while head:
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if head.val == target: # Found the target node, return it
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return head
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head = head.next
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return None # Did not find the target node, thus return None
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"""Driver Code"""
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if __name__ == "__main__":
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target = 3
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# Perform linear search in array
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nums = [1, 5, 3, 2, 4, 7, 5, 9, 10, 8]
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index: int = linear_search_array(nums, target)
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print("Index of target element 3 =", index)
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# Perform linear search in linked list
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head: ListNode = list_to_linked_list(nums)
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node: ListNode | None = linear_search_linkedlist(head, target)
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print("Target node value 3's corresponding node object is", node)
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