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pcwalton's profile
Patrick Walton
Patrick Walton
Patrick Walton
@pcwalton

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Patrick Walton

@pcwalton

Research engineer at Mozilla

San Francisco, CA
pcwalton.github.io
Joined November 2009

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    1. Graydon Hoare‏ @graydon_pub 2 Sep 2018
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      Graydon Hoare Retweeted ¯\_(ツ)_/¯

      I won’t @ them but limiting expressivity in order to limit cognitive load and keep codebases approachable is a totally legitimate move in language design. I’d even say essential. It’s all about balance, and expressivity _does_ have tradeoffs.https://twitter.com/SeanTAllen/status/1036236006872305665 …

      Graydon Hoare added,

      ¯\_(ツ)_/¯ @SeanTAllen
      Almost all the arguments I see against generics in go are pretty awful. "People might create abstractions I can't understand" is an awful argument. And that's the root of most argument I see. That's so broad that you can apply it to the base language itself. Don't @ me.
      Show this thread
      9 replies 26 retweets 128 likes
    2. Patrick Walton‏ @pcwalton 4 Sep 2018
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      Replying to @graydon_pub

      ML-style generics are less complicated than Go interfaces. There is no reason for Go not to have generics.

      3 replies 0 retweets 12 likes
    3. postmodern girl‏ @strega_nil 4 Sep 2018
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      Replying to @pcwalton @graydon_pub

      I think more languages should look at ML for a useful example of an incredibly restrictive generics system that's still powerful enough to do most of what you want it to. I think too many people are focused on extremely powerful systems to their detriment.

      2 replies 0 retweets 6 likes
    4. Patrick Walton‏ @pcwalton 4 Sep 2018
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      Replying to @strega_nil @graydon_pub

      Agreed! Too many people on both sides equate “generics” with “C++’s implementation of generics”. If I were designing Go, given the choice between interfaces and ML-style generics I would have chosen the latter.

      1 reply 0 retweets 0 likes
    5. Michael Schurter‏ @schmichael 4 Sep 2018
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      Replying to @pcwalton @graydon_pub

      Link to learn ML generics? ML is harder to search for than even Go. 😅

      1 reply 0 retweets 0 likes
    6. postmodern girl‏ @strega_nil 4 Sep 2018
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      Replying to @schmichael @pcwalton @graydon_pub

      https://en.wikipedia.org/wiki/Hindley%E2%80%93Milner_type_system …

      1 reply 0 retweets 1 like
    7. postmodern girl‏ @strega_nil 4 Sep 2018
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      Replying to @strega_nil @schmichael and

      I dunno, there are probably better resources if you want to get in depth, like, Types and Programming Languages, but that's a good overview.

      1 reply 0 retweets 0 likes
    8. Michael Schurter‏ @schmichael 4 Sep 2018
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      Replying to @strega_nil @pcwalton @graydon_pub

      Yeah, I'm having a really hard time figuring out how this would look in Go... ...are there no online language docs for ML?

      2 replies 0 retweets 0 likes
    9. Patrick Walton‏ @pcwalton 4 Sep 2018
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      Replying to @schmichael @graydon_pub

      I’ll describe it in a tweet. Syntax: func Map<T,U>(array T[], f func(T) T) U[] { ... } == works on all types, panics if you compare closures < > <= >=, ditto There’s a builtin function func Hash<T>(obj T) u64 which can hash things. That’s it.

      2 replies 0 retweets 0 likes
      Patrick Walton‏ @pcwalton 4 Sep 2018
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      Replying to @pcwalton @schmichael @graydon_pub

      Oops, make that func Map<T,U>(array T[], f func(val T) U) U[]

      9:37 PM - 4 Sep 2018 from Dogpatch, San Francisco
      • 1 Like
      • Michael Schurter
      1 reply 0 retweets 1 like
        1. New conversation
        2. Michael Schurter‏ @schmichael 4 Sep 2018
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          Replying to @pcwalton @graydon_pub

          What is array in this example and why isn't it implied by the [] on T? Likewise what does the val keyword denote?

          1 reply 0 retweets 0 likes
        3. postmodern girl‏ @strega_nil 4 Sep 2018
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          Replying to @schmichael @pcwalton @graydon_pub

          that's just Go syntax for parameters

          2 replies 0 retweets 0 likes
        4. 7 more replies

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