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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. std::mem::transmute_copy(steve, lol)‏ @steveklabnik 23 Oct 2015

      Dear Father, forgive me, for I have sinned. I just tried to explain monads to someone on the Internet.

      9 replies 10 retweets 50 likes
    2. Yehuda Katz  🥨‏Verified account @wycats 23 Oct 2015
      Replying to @steveklabnik

      @steveklabnik JS developers use monad(ish) constructs all the time: jQuery, underscore, promises.

      2 replies 1 retweet 5 likes
    3.  👻 Pastel*Quil¹³  👻‏ @robotlolita 23 Oct 2015
      Replying to @wycats

      @wycats @steveklabnik None of those are used as monads in JS, or even have a monadic instance (although they could have)

      2 replies 0 retweets 3 likes
    4. Yehuda Katz  🥨‏Verified account @wycats 23 Oct 2015
      Replying to @robotlolita

      @robotlolita @steveklabnik What do you mean by "used as monads"?

      1 reply 0 retweets 0 likes
    5.  👻 Pastel*Quil¹³  👻‏ @robotlolita 23 Oct 2015
      Replying to @wycats

      @wycats @steveklabnik people don't define flatMap/join/unit on them and use those operations when working with them.

      1 reply 0 retweets 0 likes
      Yehuda Katz  🥨‏Verified account @wycats 23 Oct 2015
      Replying to @robotlolita

      @robotlolita @steveklabnik they are required to have those names?

      6:30 PM - 23 Oct 2015
      1 reply 0 retweets 0 likes
        1. New conversation
        2.  👻 Pastel*Quil¹³  👻‏ @robotlolita 23 Oct 2015
          Replying to @wycats

          @wycats @steveklabnik No. They're only required to have equivalent types and follow the monadic laws. Which none of those examples do.

          2 replies 0 retweets 1 like
        3. Yehuda Katz  🥨‏Verified account @wycats 23 Oct 2015
          Replying to @robotlolita

          @robotlolita @steveklabnik promises are so close to monads, and used that way, that @samth felt strongly they should just BE 100% monadic

          1 reply 0 retweets 1 like
        4.  👻 Pastel*Quil¹³  👻‏ @robotlolita 23 Oct 2015
          Replying to @wycats

          @wycats @steveklabnik @samth They should, yes. But after a lot of discussion TC39 decided to just go with the overloaded .then, which is sad

          1 reply 0 retweets 0 likes
        5. Yehuda Katz  🥨‏Verified account @wycats 23 Oct 2015
          Replying to @robotlolita

          @robotlolita @steveklabnik @samth that suggests they are used in a quite monadic way, whatever we decided.

          2 replies 0 retweets 0 likes
        6. Yehuda Katz  🥨‏Verified account @wycats 23 Oct 2015
          Replying to @wycats

          @robotlolita @steveklabnik @samth the exception is that you cannot have a Promise for a Promise, but that's it.

          1 reply 0 retweets 1 like
        7.  👻 Pastel*Quil¹³  👻‏ @robotlolita 23 Oct 2015
          Replying to @wycats

          @wycats @steveklabnik @samth And that is enough to make it not a monad. You can call it "monad-ish", but you lose the monad benefits

          1 reply 0 retweets 0 likes
        8. Yehuda Katz  🥨‏Verified account @wycats 23 Oct 2015
          Replying to @robotlolita

          @robotlolita @steveklabnik @samth you lose them for a subset of types, but retain them otherwise.

          1 reply 0 retweets 0 likes
        9.  👻 Pastel*Quil¹³  👻‏ @robotlolita 23 Oct 2015
          Replying to @wycats

          @wycats @steveklabnik @samth sure, but that breaks e.g.: `sequenceM`, if you want to write it. The laws are important for abstraction/comp

          1 reply 0 retweets 1 like
        10. 57 more replies

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