题解 | 文件扩展名
文件扩展名
https://www.nowcoder.com/practice/01ca4c6aa14249c2911f89baba9dc023
<!DOCTYPE html><html lang="en"><head><meta charset="UTF-8"></head><body>
<script>
const _getExFilename = (filename) => {
// 补全代码
return filename.substring(filename.lastIndexOf('.'))
}
</script>
</body>
</html>
查看6道真题和解析