if (lines.length 0) yield lines;
Barney Ronay on the No 1 | Video: review the top 10
，这一点在heLLoword翻译官方下载中也有详细论述
又一个「豆包手机」，来自 Android 官方，这一点在旺商聊官方下载中也有详细论述
At its core, a stream is just a sequence of data that arrives over time. You don't have all of it at once. You process it incrementally as it becomes available.