嵌套集合转换为HTML列表

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1. function convertTreeToHTML(tree) {
2. let html = '<ul>';
4. for (let i = 0; i < tree.length; i++) {
5. html += '<li>';
7. if (Array.isArray(tree[i]) && tree[i].length > 0) {
8. html += convertTreeToHTML(tree[i]); // Recursive call
9. }
11. html += '</li>';
12. }
14. html += '</ul>';
15. return html;
16. }

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例子：集合$\left\{\left\{\left\{\right\},\left\{\{\}\right\},\left\{\right\}\right\},\left\{\left\{\right\},\left\{\right\}\right\}\right\}$

1. html = convertTreeToHTML([[[],[[]],[]],[[],[]]]);
2. console.log(html);

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输出

1. <ul>
2. <li>
3. <ul>
4. <li></li>
5. <li>
6. <ul>
7. <li></li>
8. </ul>
9. </li>
10. <li></li>
11. </ul>
12. </li>
13. <li>
14. <ul>
15. <li></li>
16. <li></li>
17. </ul>
18. </li>
19. </ul>

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