Dart stream operator equivalent of RxJS tap

user_3935156 0
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I'm doing my first streams in dart and I would like to print some of my values after observable operators before they make it to the listen, much like tap in RxJS. Is this possible? I can't find it in RxDart either.

For example:

final pulseStream = field.control.valueChanges
    .where((dynamic val) => (val as String).length < 20)
    .tap(print)
    .where((dynamic val) => (val as String).isNotEmpty)
    .tap(print)
    .where((dynamic val) => pulseController != null)
    .tap(print)
    .where((dynamic val) => !pulseController.isAnimating);
rxdart dart stream
1 Answers

That is doX operator:

RxDart                             |  RxJS
------------------------
doOnData(print)                    | tap(console.log) or tap({ next: console.log })
doOnError((e, s) => print(e))      | tap({ error: console.log })
doOnDone(() => print('done'))      | tap({ complete: () => console.log('complete') })
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