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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. This Tweet is unavailable.
    2. Vaughn Vernon‏ @VaughnVernon 13 Apr 2018

      I believe you, because you are a reasonable person. The argument that you can't prove the second algebraically is a complete a waste of time.

      0 replies 0 retweets 0 likes
    3. This Tweet is unavailable.
    4. Vaughn Vernon‏ @VaughnVernon 13 Apr 2018

      So in some cases you have (int) and in others (unit,int). I can reason on that :)

      0 replies 0 retweets 0 likes
    5. This Tweet is unavailable.
    6. Vaughn Vernon‏ @VaughnVernon 13 Apr 2018

      Yes, I understand that you are clarifying. I find that level of reasoning pedantic, and those who argue that point as if software can't possibly work correctly without it are ignoring their editor as they type.

      0 replies 0 retweets 0 likes
    7. This Tweet is unavailable.
    8. Vaughn Vernon‏ @VaughnVernon 13 Apr 2018

      I don't consider anything ad-hoc that has the proof of billions of lines of code in working software. Also, I am certain that there are plenty of Scala and Haskell FP purests that write horrible code that few can reason about.

      0 replies 0 retweets 3 likes
    9. This Tweet is unavailable.
    10. Jon Pretty‏ @propensive 13 Apr 2018

      I think there's a tendency for FP purists to exaggerate the brokenness of software. Most people have lower standards. But perfect purity is the only position from which anyone can claim the absence of certain classes of bugs... and they do.

      1 reply 0 retweets 3 likes
      Jon Pretty‏ @propensive 13 Apr 2018
      Replying to @propensive @VaughnVernon @1ovthafew

      And they get confidence from the fact they write thousands of lines of code, and they never see certain kinds of bug. And from their perspective, amongst those thousands of lines of code, a single impure method call will look egregious.

      11:08 AM - 13 Apr 2018 from Krakow, Poland
      1 reply 0 retweets 0 likes
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        1. Vaughn Vernon‏ @VaughnVernon 13 Apr 2018
          Replying to @propensive @1ovthafew

          Are there any Scala and Haskell bugs that programmers feel confident don't exist because the compiler assured them?

          1 reply 0 retweets 0 likes
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