例如，我有一個(gè)每秒發(fā)出一個(gè)數(shù)字的 observable。我想將它們緩沖到數(shù)組中 4 秒。但是當(dāng)源發(fā)出一個(gè)可以被 5 整除的數(shù)字時(shí)，我想立即發(fā)出它而不是緩沖它。// emit value in sequence every 1 second// 0,1,2,3,4,5...const source = interval(1000);// buffer values for 4 secondsconst buffered = source.pipe(  buffer(interval(4000)),  filter(x => x.length > 0)  );const subscribe = buffered.subscribe(val => console.log(val));我的預(yù)期結(jié)果是：[0,1,2,3] // buffered and emitted after 4 seconds[5] // emitted immediately[4,6,7,8] // buffered and emitted after 4 seconds[10] // emitted immediately[9,11,12,13]// ... and so onStackblitz：https ://stackblitz.com/edit/typescript-cdvc2d ? file = index.ts