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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. Jon Pretty‏ @propensive Jan 28

      There are arguments to be made for both dynamic and static languages being good for moving quickly or accommodating change, often in the context of a startup. And it's true for both, except that a static language only lets you move quickly between correct programs.

      6 replies 2 retweets 24 likes
      Show this thread
    2. Maciej Sikora‏ @macsikora Jan 28
      Replying to @propensive

      I would say programs which don't crash. But no crashing and correctness are different things. You can have bulletproof program which works badly and has invalid logic implemented. Such program is not correct.

      2 replies 0 retweets 0 likes
    3. Jon Pretty‏ @propensive Jan 28
      Replying to @macsikora

      Sorry, I was using the specific meaning of "correctness" of "correct with respect to its specification" and that specification is given by the types. That's basically what you described as "doesn't crash". It says nothing about correctness with respect to the customer's intent.

      1 reply 0 retweets 1 like
    4. Gabriel Jones‏ @gabrieljones Jan 29
      Replying to @propensive @macsikora

      Can a dynamic program be both intent correct and spec incorrect?

      1 reply 0 retweets 0 likes
      Jon Pretty‏ @propensive Jan 30
      Replying to @gabrieljones @macsikora

      Only if the spec doesn't reflect intent, I suppose...

      1:09 AM - 30 Jan 2021 from Frankfurt on the Main, Germany
      0 replies 0 retweets 0 likes

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