There's also Stream.broadcast() for push-based multi-consumer scenarios. Both require you to think about what happens when consumers run at different speeds, because that's a real concern that shouldn't be hidden.
if (pending.length 0) yield [pending];
，更多细节参见爱思助手下载最新版本
虽然安抚的过程很艰难，但好歹是听进去了，然后顺利的到了幼儿园门口，可是第三天还是有很多小朋友在门口哭，她的情绪这次被带了起来，也开始哭，不过好在妈妈安慰的很好，她情绪来的快，去的也快，也顺利的走进了幼儿园。
Choose wisely. The traffic is already flowing. The only question is whether it flows to you or your competitors.