newDay4 (stream)

 

Stream

 

Stream.castFrom(source)
Stream.empty();
Stream.error(error);
Stream.eventTransformed(source, (sink) => null)
Stream.fromFuture(future)
Stream.fromFutures(futures)
Stream.fromIterable(elements)
Stream.multi((p0) { })
Stream.periodic(period)
Stream.value(value)

 

 

9. periodic

computation이 있어야합니다. 없으면 null이 나옵니다.

void main(){
  //Stream<int>
  var computation = (x)=> x;
   var stream = Stream.periodic(const Duration(seconds: 1), computation).take(10);

  stream.listen(print);

}