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Asynchrony is not concurrency

(kristoff.it)
292 points kristoff_it | 2 comments | 18 Jul 25 19:21 UTC | HN request time: 0.535s | source
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raluk ◴[18 Jul 25 20:46 UTC] No.44609651[source]▶
One thing that most languages are lacking is expressing lazy return values. -> await f1() + await f2() and to express this concurently requres manually handing of futures.
replies(3): >>44609880 #>>44610056 #>>44610348 #
sedatk ◴[18 Jul 25 21:11 UTC] No.44609880[source]▶
Which languages do have such a thing?
replies(2): >>44610179 #>>44610709 #
1. Twey ◴[18 Jul 25 21:47 UTC] No.44610179[source]▶
I suppose Haskell does, as `(+) <$> f1 <*> f2`.
replies(1): >>44612756 #
2. raluk ◴[19 Jul 25 05:12 UTC] No.44612756[source]▶
In there is also ApplicativeDo that works nicely with this.

    do 
      x <- f1
      y <- f2
      return $ x + y
this is evaluated as applicative in same way.