用链接包裹Rx JS Observable

Question

有没有办法通过链接将Observerable映射到另一个？我现在正在这样做：

const myObserverable = fnThatReturnsObserverable();
return anotherFunctionThatReturnsObserverable(myObserverable);

有没有办法以链式方式做到这一点？

return fnThatReturnsObserverable().someOperator(anotherFunctionThatReturnsObserverable)

Answer 1

fnThatReturnsObserverable()
    .let(obs => anotherFunctionThatReturnsObserverable(obs));

有关它的更多信息here。

Answer 2

您还可以使用of和mergeMap(or concatMap)

Observable.of(fnThatReturnsObserverable())
    .mergeMap(ob => anotherFunctionThatReturnsObserverable(obs));