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propensive's profile
Jon Pretty
Jon Pretty
Jon Pretty
@propensive

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Jon Pretty

@propensive

Supporting Scala through professional training and open-source software. Responsible for Magnolia, Fury, Scala World and Functional Africa.

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propensive.com
Joined July 2010

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    1. Roland Kuhn‏ @rolandkuhn 27 Feb 2017
      Replying to @propensive

      Let’s call this “Jon’s conjecture”.

      1 reply 0 retweets 1 like
    2. Jon Pretty‏ @propensive 27 Feb 2017
      Replying to @rolandkuhn

      I feel like I should be offering some commentary on whether my conjecture is a good thing or a bad thing, but I'm not sure...

      1 reply 1 retweet 0 likes
    3. Roland Kuhn‏ @rolandkuhn 27 Feb 2017
      Replying to @propensive

      Well, corroborating it with evidence would be a start—though I do agree with the intuition. Types are a tool that needs learning

      1 reply 0 retweets 0 likes
    4. Jon Pretty‏ @propensive 27 Feb 2017
      Replying to @rolandkuhn

      My evidence is that you can't "just run the code anyway, and see how far it gets before crashing" with types.

      4 replies 0 retweets 1 like
    5. Jon Pretty‏ @propensive 27 Feb 2017
      Replying to @propensive @rolandkuhn

      Though I'm not intending to add positive/negative sentiment to that. Is being able to run something that's broken a good thing?

      1 reply 0 retweets 0 likes
    6. Roland Kuhn‏ @rolandkuhn 27 Feb 2017
      Replying to @propensive

      Data point: Martin added ??? to Scala. Another data point: I use this feature regularly while prototyping.

      4 replies 1 retweet 6 likes
    7. Tpol Chico‏ @tpolecat 27 Feb 2017
      Replying to @rolandkuhn @propensive

      yep, I see ??? as a way to express "incomplete but not broken" which is a very useful state to be in.

      1 reply 2 retweets 4 likes
    8. Roland Kuhn‏ @rolandkuhn 27 Feb 2017
      Replying to @tpolecat

      Well, only programs are proofs and ??? is an unsafe escape hatch: the type-level computation might actually be broken. @propensive

      1 reply 0 retweets 0 likes
    9. Tpol Chico‏ @tpolecat 27 Feb 2017
      Replying to @rolandkuhn @propensive

      good point, the hole may be un-fillable.

      1 reply 0 retweets 0 likes
    10. Eric Peters‏ @ericpeters 27 Feb 2017
      Replying to @tpolecat @rolandkuhn @propensive

      I thought there was a way to disable ??? for a production compile? if not maybe that helps solve it...

      1 reply 0 retweets 2 likes
      Jon Pretty‏ @propensive 27 Feb 2017
      Replying to @ericpeters @tpolecat @rolandkuhn

      Hmm, that sounds familiar but I don't remember a flag. Using a different Predef would be one way to do it.

      10:57 AM - 27 Feb 2017
      1 reply 0 retweets 0 likes
        1. Eric Peters‏ @ericpeters 27 Feb 2017
          Replying to @propensive @tpolecat @rolandkuhn

          I vote for ?!? Lol

          0 replies 0 retweets 0 likes
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