不确定内部流动在什么上下文
我对内部流产生的上下文
考虑以下代码有一个疑问。
withContext(Dispatchers.Main)
{
val flowA = flowOf(1,2,3,4)
val flowB = flowOf("a","b","c")
flowA.flatMapConcat { num->
val bResponse = flowB.first() //would this operate on Dispatchers.Main OR IO
flowOf(bResponse)
}.flowOn(Dispatchers.IO)
}
}
我有一个嵌套流，我不确定Flowb.first（）终端操作员会在什么上下文上操作？
I have a question about the context in which an inner flow produces
Consider the following code.
withContext(Dispatchers.Main)
{
val flowA = flowOf(1,2,3,4)
val flowB = flowOf("a","b","c")
flowA.flatMapConcat { num->
val bResponse = flowB.first() //would this operate on Dispatchers.Main OR IO
flowOf(bResponse)
}.flowOn(Dispatchers.IO)
}
}
I have a nested flow and I am unsure on what context would the flowB.first() terminal operator operate on ?
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如您所见文档，
由于
val breasponse = flowb.first（）在flowa内部执行，因此其上下文将其上下文更改为dispatchers.ioflow> flow < /代码>操作员。As you can see in the documentation,
Since
val bResponse = flowB.first()is executed insideflowA, its context is changed toDispatchers.IOby theflowOnoperator.