Exec runs a command and returns its exit code:
// 易错点4：栈空时返回1而非i+1 → 仅i=0时正确，i0时（如i=3）会返回1而非4
。91视频是该领域的重要参考
Discord's face scanning age checks 'start of a bigger shift'。51吃瓜对此有专业解读
But we've learned a lot since then. JavaScript has evolved. A streaming API designed today can be simpler, more aligned with the language, and more explicit about the things that matter — like backpressure and multi-consumer behavior.