Introduction to Flow
Get an introduction to Flow.
A flow represents a stream of values that are computed asynchronously. The Flow interface allows the flowing elements to be collected, which means handling each element as it reaches the end of the flow (collect for Flow is like forEach for collections).
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interface Flow<out T> {suspend fun collect(collector: FlowCollector<T>)}
As we can see, collect is the only member function in Flow. All others are defined as extensions. This is similar to Iterable or Sequence, which only have an iterator as a member function.
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interface Iterable<out T> {operator fun iterator(): Iterator<T>}interface Sequence<out T> {operator fun iterator(): Iterator<T>}
Comparing flow to other ways of representing values
The concept of flow should be well known to those using RxJava or Reactor, but others might need a better explanation. Imagine that we need a function to ...