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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 26

      What English word would you use to describe a particular example of a type constructor, in the sense that `List[Int]` and `List[String]` are examples of `List`s? I'd like to avoid calling them "examples" if possible.

      27 replies 0 retweets 4 likes
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    2. Jon Pretty‏ @propensive Jan 26

      This question arose because we can talk about `List`'s type parameter being "instantiated" (that is, decided during typechecking) to `Int` or `String`, but saying `List[Int]` is an instance of a type is problematic because it implies the creation of a new heap object.

      1 reply 0 retweets 0 likes
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    3. Jon Pretty‏ @propensive Jan 26

      So while "List[Int] is an instance of a List" is correct in a certain context, I don't want to confuse my readers by assuming they have precisely that context and not a slightly different one. Any ideas?

      19 replies 0 retweets 0 likes
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    4. Adrien Piquerez‏ @adrienpi2 Jan 26
      Replying to @propensive

      Does it make sense to say that "List[Int] is a type of List"?

      1 reply 0 retweets 0 likes
      Jon Pretty‏ @propensive Jan 26
      Replying to @adrienpi2

      Kind of... ;)

      8:45 AM - 26 Jan 2021
      • 1 Like
      • Adrien Piquerez
      0 replies 0 retweets 1 like

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