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TimSweeneyEpic's profile
Tim Sweeney
Tim Sweeney
Tim Sweeney
@TimSweeneyEpic

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Tim Sweeney

@TimSweeneyEpic

Epic Games founder & CEO

epicgames.com
Joined August 2013

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    1. Tim Sweeney‏ @TimSweeneyEpic Feb 1
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      Here’s an exercise in separating fundamentals from conventions: if we held a technical summit with all of the galaxy’s advanced alien civilizations, what would we find we had in common, and what would we find inscrutable?

      27 replies 31 retweets 217 likes
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    2. Tim Sweeney‏ @TimSweeneyEpic Feb 1
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      Spoken language would be inscrutable. Different physiologies would lead to an inability to speak or even hear each others’ phonemes. Written language would be inscruible, though we might find analogs of nouns, adjectives, and verbs.

      2 replies 0 retweets 35 likes
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    3. Tim Sweeney‏ @TimSweeneyEpic Feb 1
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      But mathematics would be shared. After translating syntax and symbols, we’d find we had exactly the same constructive axioms, and agree that other axioms are controversial. We’d have the same theorems and the same proofs. They’d rever a Pythagoras and a Leibniz.

      15 replies 1 retweet 43 likes
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    4. Tim Sweeney‏ @TimSweeneyEpic Feb 1
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      Now we compare programming languages. We’d find some low level constructs have developed very differently. Maybe they’d have balanced tertiary numbers instead of twos-complement and u-law fractional numbers instead of floating point. Our bitwise ops may have no analog.

      5 replies 0 retweets 20 likes
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      Tim Sweeney‏ @TimSweeneyEpic Feb 1
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      So, let’s ask: what parts of programming would we have in common? We’d share the mathematical integers, and data structures analogous to Cartesian products (structs) and sums (unions), and functions with side effects, and pure functions as a special case.

      8:39 PM - 1 Feb 2020
      • 23 Likes
      • Mario Guermandi Mahdi ! Covid Kun Collin Kruger SouredWard Charles Rosenbauer ADK Aidan Steven Gussman Samuel Pike
      4 replies 0 retweets 23 likes
        1. New conversation
        2. Tim Sweeney‏ @TimSweeneyEpic Feb 1
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          We’d have transactions as a way of running concurrent operations atomically. We’d have most of Knuth’s algorithms in common (maybe they’d have some major breakthroughs we lack!)

          2 replies 0 retweets 22 likes
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        3. Tim Sweeney‏ @TimSweeneyEpic Feb 1
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          The goal of a high level programming language is to be something that we and these alien civilizations could agree on as universal and principled, and free of quirks and arbitrarity.

          12 replies 4 retweets 63 likes
          Show this thread
        4. End of conversation
        1. New conversation
        2. mxh‏ @muxah Feb 2
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          Replying to @TimSweeneyEpic

          could you expand on pure functions being a special case, and not the ones with side effects?

          1 reply 0 retweets 1 like
        3. Tim Sweeney‏ @TimSweeneyEpic Feb 2
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          Replying to @muxah

          Pure functions have many useful properties that can be used in generic types all the way up to proving programs correct. They enable us to reason about equality of unknown values derived from complex expressions involving unknown pure functions.

          0 replies 0 retweets 1 like
        4. End of conversation
        1. Sajjad Heydari‏ @Sajjad_Heydari Feb 1
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          Replying to @TimSweeneyEpic

          I assume something similar to functional patterns would be shared, things such as map and filter, in one way or another would show up. But that's it. They might not even have our notion of conditions or loops at all

          0 replies 0 retweets 1 like
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        2. Dan L‏ @danl2620 Feb 2
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          Replying to @TimSweeneyEpic

          Philip Wadler has a persuasive answer with logic yielding programming languages (e.g. lambda calculus).https://www.youtube.com/watch?v=IOiZatlZtGU …

          1 reply 0 retweets 1 like
        3. Dan L‏ @danl2620 Feb 2
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          Replying to @danl2620 @TimSweeneyEpic

          payoff: "[The core of Functional Languages] is not arbitrary. Their core is something that was written down once by a logician, and once by a computer scientist. That is, it was not invented, but discovered."

          0 replies 0 retweets 0 likes
        4. End of conversation

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