Transform each element in the stream by calling a mapping function with it and passing the returned value downstream.
Simple operators
def map [ T ]( f : Out => T ): Repr [ T ]
Transform each element in the stream by calling a mapping function with it and passing the returned value downstream.
emits when the mapping function returns an element
backpressures when downstream backpressures
completes when upstream completes
Scala
copy source import akka . NotUsed
import akka . stream . scaladsl . _
val source : Source [ Int , NotUsed ] = Source ( 1 to 10 )
val mapped : Source [ String , NotUsed ] = source . map ( elem => elem . toString )
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