convention for Future/Stream that have no value

[Lex Berezhny]

Hello,

I was wondering if there was any general convention for what to do when you only care to announce that something happened but there is really no associated value.

I know for the listener you can use underscore:

success.then((_) {

  print('Yippy!!');

});

But what about in the completer?

success_completer.complete(null);

success_completer.complete(true);

Is there a convention that people are using for this? I suppose 'null' is more obvious that the value is irrelevant, using true might imply that there could also be a false?

 - lex

[Lasse R.H. Nielsen]

The convention is to use null as the value, and since the argument to complete is optional, that can be just:

  success_completer.complete();

https://api.dartlang.org/apidocs/channels/stable/dartdoc-viewer/dart:async.Completer#id_complete

/L

-- 

Lasse R.H. Nielsen - l...@google.com  

'Faith without judgement merely degrades the spirit divine'
Google Denmark ApS - Frederiksborggade 20B, 1 sal - 1360 København K - Denmark - CVR nr. 28 86 69 84

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Lasse R.H. Nielsen - l...@google.com  

'Faith without judgement merely degrades the spirit divine'
Google Denmark ApS - Frederiksborggade 20B, 1 sal - 1360 København K - Denmark - CVR nr. 28 86 69 84