mirror of
https://github.com/krahets/hello-algo.git
synced 2024-12-26 11:46:29 +08:00
48 lines
1.2 KiB
Dart
48 lines
1.2 KiB
Dart
|
/**
|
||
|
* File: linear_search.dart
|
||
|
* Created Time: 2023-05-12
|
||
|
* Author: Jefferson (JeffersonHuang77@gmail.com)
|
||
|
*/
|
||
|
|
||
|
import '../utils/list_node.dart';
|
||
|
|
||
|
/* 線性查詢(陣列) */
|
||
|
int linearSearchArray(List<int> nums, int target) {
|
||
|
// 走訪陣列
|
||
|
for (int i = 0; i < nums.length; i++) {
|
||
|
// 找到目標元素,返回其索引
|
||
|
if (nums[i] == target) {
|
||
|
return i;
|
||
|
}
|
||
|
}
|
||
|
// 未找到目標元素,返回 -1
|
||
|
return -1;
|
||
|
}
|
||
|
|
||
|
/* 線性查詢(鏈結串列) */
|
||
|
ListNode? linearSearchList(ListNode? head, int target) {
|
||
|
// 走訪鏈結串列
|
||
|
while (head != null) {
|
||
|
// 找到目標節點,返回之
|
||
|
if (head.val == target) return head;
|
||
|
head = head.next;
|
||
|
}
|
||
|
// 未找到目標元素,返回 null
|
||
|
return null;
|
||
|
}
|
||
|
|
||
|
/* Driver Code */
|
||
|
void main() {
|
||
|
int target = 3;
|
||
|
|
||
|
/* 在陣列中執行線性查詢 */
|
||
|
List<int> nums = [1, 5, 3, 2, 4, 7, 5, 9, 10, 8];
|
||
|
int index = linearSearchArray(nums, target);
|
||
|
print('目標元素 3 的索引 = $index');
|
||
|
|
||
|
/* 在鏈結串列中執行線性查詢 */
|
||
|
ListNode? head = listToLinkedList(nums);
|
||
|
ListNode? node = linearSearchList(head, target);
|
||
|
print('目標節點值 3 的對應節點物件為 $node');
|
||
|
}
|