deno.land / x / masx200_leetcode_test@10.6.5 / binary-tree-preorder-traversal / index.ts

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import { TreeNode } from "../binary-tree-inorder-traversal/TreeNode.ts";
export default function preorderTraversal(root: TreeNode | null): number[] { if (!root) return []; const res: number[] = []; preorder(root, (a) => res.push(a)); return res;}function preorder(root: TreeNode | null, output: (a: number) => void) { if (!root) return; output(root.val); preorder(root.left, output);
preorder(root.right, output);}
masx200_leetcode_test
leetcode题解和一些测试工具
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4 months ago