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wycats's profile
Yehuda Katz 🥨
Yehuda Katz 🥨
Yehuda Katz  🥨
Verified account
@wycats

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Yehuda Katz  🥨Verified account

@wycats

Tilde Co-Founder, OSS enthusiast and world traveler.

Portland, OR
yehudakatz.com
Joined August 2007

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    1. BOOlean  👻 🐶 🏳️‍🌈‏ @jamiebuilds 14 Jul 2016

      If you're using @AtomEditor without https://nuclide.io  and @flowtype, you're doing it wrong. $ apm install nuclide go

      6 replies 9 retweets 44 likes
    2. Yehuda Katz  🥨‏Verified account @wycats 14 Jul 2016
      Replying to @jamiebuilds @thejameskyle and

      Hm I guess I escaped alive because while I use TypeScript, I don't use atom (vscode instead) 😓

      2 replies 2 retweets 9 likes
    3. BOOlean  👻 🐶 🏳️‍🌈‏ @jamiebuilds 14 Jul 2016
      Replying to @wycats @AtomEditor

      Just thinking about all those bugs that @flowtype could've caught 😱 Just kidding, we know you write perfect code 😛

      1 reply 0 retweets 0 likes
    4. Yehuda Katz  🥨‏Verified account @wycats 14 Jul 2016
      Replying to @jamiebuilds @thejameskyle and

      TypeScript is pretty good. Bugs in TypeScript: gotta catch em all.

      2 replies 0 retweets 6 likes
    5. Naman Goel‏ @naman34 14 Jul 2016
      Replying to @wycats

      typescript's type system is not flexible enough for me. Flow has gotten so good recently it's basically no contest anymore.

      1 reply 0 retweets 0 likes
      Yehuda Katz  🥨‏Verified account @wycats 14 Jul 2016
      Replying to @naman34

      which kinds of flexibility are you talking about?

      8:07 PM - 14 Jul 2016
      5 replies 0 retweets 0 likes
        1. New conversation
        2. Naman Goel‏ @naman34 14 Jul 2016
          Replying to @wycats

          Also. Typescript can't be used to define complex types such as this.pic.twitter.com/rBsPWbIIHN

          2 replies 0 retweets 2 likes
        3. Yehuda Katz  🥨‏Verified account @wycats 14 Jul 2016
          Replying to @naman34

          Is this a Higher Kinded Type? What is it being used for here exactly? Hard to tell just by looking at it.

          1 reply 0 retweets 0 likes
        4. Naman Goel‏ @naman34 14 Jul 2016
          Replying to @wycats

          This is just the definition. It takes a nullable type and gives you a non-nullable type. used it for Array<?T>.filter(Boolean)

          2 replies 0 retweets 0 likes
        5. Yehuda Katz  🥨‏Verified account @wycats 14 Jul 2016
          Replying to @naman34

          in TS, I do things like: function unwrap<T>(v: Option<T>): T { if (v === null) throw new Error("null!"); else return v; }

          1 reply 0 retweets 2 likes
        6. Yehuda Katz  🥨‏Verified account @wycats 14 Jul 2016
          Replying to @wycats @naman34

          for context: type Option<T> = T | null; type Maybe<T> = Option<T> | undefined;

          2 replies 0 retweets 2 likes
        7. Naman Goel‏ @naman34 14 Jul 2016
          Replying to @wycats

          That works for normal functions. Doesn’t work for methods like Array.filter

          1 reply 0 retweets 0 likes
        8. Yehuda Katz  🥨‏Verified account @wycats 14 Jul 2016
          Replying to @naman34

          What are the semantics of A.p.f that you're trying to capture?

          1 reply 0 retweets 0 likes
        9. Naman Goel‏ @naman34 14 Jul 2016
          Replying to @wycats

          class Array<T>{ filter(fn: typeof Boolean): Array<$NonNull<T>>; }

          2 replies 0 retweets 0 likes
        10. 20 more replies
        1. Naman Goel‏ @naman34 14 Jul 2016
          Replying to @wycats

          *large typescript project.

          0 replies 0 retweets 0 likes
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        1. Naman Goel‏ @naman34 14 Jul 2016
          Replying to @wycats

          and those language features are a pretty big concern when coming to a typescript code base.

          0 replies 0 retweets 0 likes
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        1. Naman Goel‏ @naman34 14 Jul 2016
          Replying to @wycats

          typescript does a lot for syntax. And adds many language features. But it's type system is not as strong as Flow's

          0 replies 0 retweets 0 likes
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        1. Naman Goel‏ @naman34 14 Jul 2016
          Replying to @wycats

          one example is higher order components for react. Can be done with flow can't be done with typescript.

          0 replies 0 retweets 0 likes
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