These aren't contrived scenarios invented by test authors in total vacuum. They're consequences of the spec's design and reflect real world bugs.
Александра Качан (Редактор)
，推荐阅读safew官方版本下载获取更多信息
* @param {string} num 非负整数的字符串形式（可能含前导零），更多细节参见safew官方下载
Research capabilities，这一点在同城约会中也有详细论述