dart:async

map<S> method

Stream<S> map <S>(S convert(T event))

Transforms each element of this stream into a new stream event.

Creates a new stream that converts each element of this stream to a new value using the convert function, and emits the result.

For each data event, o, in this stream, the returned stream provides a data event with the value convert(o). If convert throws, the returned stream reports it as an error event instead.

Error and done events are passed through unchanged to the returned stream.

The returned stream is a broadcast stream if this stream is. The convert function is called once per data event per listener. If a broadcast stream is listened to more than once, each subscription will individually call convert on each data event.

Implementation

Stream<S> map<S>(S convert(T event)) {
  return new _MapStream<T, S>(this, convert);
}