Skip to content
By using Twitter’s services you agree to our Cookies Use. We and our partners operate globally and use cookies, including for analytics, personalisation, and ads.
  • Home Home Home, current page.
  • About

Saved searches

  • Remove
  • In this conversation
    Verified accountProtected Tweets @
Suggested users
  • Verified accountProtected Tweets @
  • Verified accountProtected Tweets @
  • Language: English
    • Bahasa Indonesia
    • Bahasa Melayu
    • Català
    • Čeština
    • Dansk
    • Deutsch
    • English UK
    • Español
    • Filipino
    • Français
    • Hrvatski
    • Italiano
    • Magyar
    • Nederlands
    • Norsk
    • Polski
    • Português
    • Română
    • Slovenčina
    • Suomi
    • Svenska
    • Tiếng Việt
    • Türkçe
    • Ελληνικά
    • Български език
    • Русский
    • Српски
    • Українська мова
    • עִבְרִית
    • العربية
    • فارسی
    • मराठी
    • हिन्दी
    • বাংলা
    • ગુજરાતી
    • தமிழ்
    • ಕನ್ನಡ
    • ภาษาไทย
    • 한국어
    • 日本語
    • 简体中文
    • 繁體中文
  • Have an account? Log in
    Have an account?
    · Forgot password?

    New to Twitter?
    Sign up
wycats's profile
Yehuda Katz 🥨
Yehuda Katz 🥨
Yehuda Katz  🥨
Verified account
@wycats

Tweets

Yehuda Katz  🥨Verified account

@wycats

Tilde Co-Founder, OSS enthusiast and world traveler.

Portland, OR
yehudakatz.com
Joined August 2007

Tweets

  • © 2018 Twitter
  • About
  • Help Center
  • Terms
  • Privacy policy
  • Cookies
  • Ads info
Dismiss
Previous
Next

Go to a person's profile

Saved searches

  • Remove
  • In this conversation
    Verified accountProtected Tweets @
Suggested users
  • Verified accountProtected Tweets @
  • Verified accountProtected Tweets @

Promote this Tweet

Block

  • Tweet with a location

    You can add location information to your Tweets, such as your city or precise location, from the web and via third-party applications. You always have the option to delete your Tweet location history. Learn more

    Your lists

    Create a new list


    Under 100 characters, optional

    Privacy

    Copy link to Tweet

    Embed this Tweet

    Embed this Video

    Add this Tweet to your website by copying the code below. Learn more

    Add this video to your website by copying the code below. Learn more

    Hmm, there was a problem reaching the server.

    By embedding Twitter content in your website or app, you are agreeing to the Twitter Developer Agreement and Developer Policy.

    Preview

    Why you're seeing this ad

    Log in to Twitter

    · Forgot password?
    Don't have an account? Sign up »

    Sign up for Twitter

    Not on Twitter? Sign up, tune into the things you care about, and get updates as they happen.

    Sign up
    Have an account? Log in »

    Two-way (sending and receiving) short codes:

    Country Code For customers of
    United States 40404 (any)
    Canada 21212 (any)
    United Kingdom 86444 Vodafone, Orange, 3, O2
    Brazil 40404 Nextel, TIM
    Haiti 40404 Digicel, Voila
    Ireland 51210 Vodafone, O2
    India 53000 Bharti Airtel, Videocon, Reliance
    Indonesia 89887 AXIS, 3, Telkomsel, Indosat, XL Axiata
    Italy 4880804 Wind
    3424486444 Vodafone
    » See SMS short codes for other countries

    Confirmation

     

    Welcome home!

    This timeline is where you’ll spend most of your time, getting instant updates about what matters to you.

    Tweets not working for you?

    Hover over the profile pic and click the Following button to unfollow any account.

    Say a lot with a little

    When you see a Tweet you love, tap the heart — it lets the person who wrote it know you shared the love.

    Spread the word

    The fastest way to share someone else’s Tweet with your followers is with a Retweet. Tap the icon to send it instantly.

    Join the conversation

    Add your thoughts about any Tweet with a Reply. Find a topic you’re passionate about, and jump right in.

    Learn the latest

    Get instant insight into what people are talking about now.

    Get more of what you love

    Follow more accounts to get instant updates about topics you care about.

    Find what's happening

    See the latest conversations about any topic instantly.

    Never miss a Moment

    Catch up instantly on the best stories happening as they unfold.

    1. 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
    2. Naman Goel‏ @naman34 14 Jul 2016
      Replying to @naman34 @wycats

      that’s the type I added to the flow-core lib. Again, not saying this is some big reason for preferring Flow. just many small things

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

      After the non-nullable types and flow analysis. Typescript is pretty good. Just not quite Flow level yet.

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

      fwiw, as someone who works on #rustlang, I can understand advanced type system features. Lay it on me :)

      1 reply 0 retweets 1 like
    5. Naman Goel‏ @naman34 14 Jul 2016
      Replying to @wycats

      hey. Got all the respect for you in the world. You probably know way more about type systems than I can imagine.

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

      I'm very interested in the concrete thing you're trying to express. I'll be the first to admit deficiencies in TS.

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

      maybe it's a little academic. All I'm trying to express is an overloaded type for the Array filter method.

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

      so while normally .filter will return the same array type as the input. If the function is the Boolean class it removes the nulla

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

      here's what I would do in TS:pic.twitter.com/pwymUG3BZb

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

      looks good. But I think the second filter should return Option<T>[]

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

      yep. Bug!pic.twitter.com/yCIQ6HxLFm

      11:49 PM - 14 Jul 2016
      • 1 Like
      • Naman Goel
      2 replies 0 retweets 1 like
        1. New conversation
        2. Naman Goel‏ @naman34 14 Jul 2016
          Replying to @wycats

          exactly the use-case I was going for! The next big project is to type immutable.js without losing any info.

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

          $keys gives flow a bit of an edge. But neither flow or TS can fully type immutable.js right now. Another day!

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

          which aspect of immutable.js is un-typeable? (I've had fun times trying to type parts of Ember, so I know a few tricks :P)

          2 replies 0 retweets 1 like
        5. Naman Goel‏ @naman34 14 Jul 2016
          Replying to @wycats

          1. .get should only take valid keys for a Record. (Possible with $keys in flow)

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

          ah it produces an enum of the keys of a type?

          2 replies 0 retweets 1 like
        7. Naman Goel‏ @naman34 14 Jul 2016
          Replying to @wycats

          there are a few secret magic types in flow that are the most awesome things for typing library code. $keys gives you a string enum.

          3 replies 0 retweets 1 like
        8. Yehuda Katz  🥨‏Verified account @wycats 15 Jul 2016
          Replying to @naman34

          so you want to automate this?pic.twitter.com/0hUlrJ1ibE

          1 reply 0 retweets 0 likes
        9. Naman Goel‏ @naman34 15 Jul 2016
          Replying to @wycats

          yup!

          1 reply 0 retweets 0 likes
        10. 2 more replies
        1. New conversation
        2. Yehuda Katz  🥨‏Verified account @wycats 14 Jul 2016
          Replying to @wycats @naman34

          btw I'm using the annotations to indicate what inference would have picked.

          1 reply 0 retweets 1 like
        3. Naman Goel‏ @naman34 14 Jul 2016
          Replying to @wycats

          yup. Got that.

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

          proof:pic.twitter.com/8ABVv7kjBW

          0 replies 0 retweets 1 like
        5. End of conversation

      Loading seems to be taking a while.

      Twitter may be over capacity or experiencing a momentary hiccup. Try again or visit Twitter Status for more information.

        Promoted Tweet

        false

        • © 2018 Twitter
        • About
        • Help Center
        • Terms
        • Privacy policy
        • Cookies
        • Ads info