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danluu's profile
Dan Luu
Dan Luu
Dan Luu
@danluu

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Dan Luu

@danluu

https://patreon.com/danluu 

danluu.com
Joined December 2008

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    1. Hillel‏ @hillelogram Apr 14
      • Report Tweet

      When I complained about how ill-defined "simple" was, a lot of people pointed me to Hickey's "simple made easy". Here's a challenge about that: Provide code that is simple but not easy. Then provide code in the same language, doing the same thing, that is easy but not simple.

      34 replies 13 retweets 76 likes
      Show this thread
    2. Dan Luu‏ @danluu May 15
      • Report Tweet
      Replying to @hillelogram

      Took me a while to get to it, but I re-watched this talk as a result of your tweet and the most striking thing to me is how it's a series of reasonable sounding but totally unsupported and often ill-defined and/or unfalsifiable claims.

      1 reply 3 retweets 12 likes
    3. Dan Luu‏ @danluu May 15
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      Replying to @danluu @hillelogram

      Like, "we can only hope to make reliable those things we can understand". Sounds reasonable, how can you argue with that? But, in fact, this is quite common in engineering. A lot of engineering is making reliable things we don't understand!pic.twitter.com/lGzSb0m1bq

      2 replies 0 retweets 8 likes
    4. Dan Luu‏ @danluu May 15
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      Replying to @danluu @hillelogram

      When I worked on flash mem (2001), I read the literature on how it worked. At the time, the exact physical mechanism by which some things happened wasn't understood. There were theories, but multiple theories were consistent with what was observed. But we can make flash reliable!

      2 replies 1 retweet 4 likes
    5. Dan Luu‏ @danluu May 15
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      Replying to @danluu @hillelogram

      And to the extent that it's not reliable, we can describe when we expect it to be unreliable and what the odds are. Someone might argue that this is equivalent to "understanding", but that's your point, I think -- the talk is so vague it can mean whatever you want.

      1 reply 0 retweets 1 like
    6. Dan Luu‏ @danluu May 15
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      Replying to @danluu @hillelogram

      He has this idea that composing simple components is the way to make robust systems and that abstractions over complexity are worthless.Sounds reasonable, but we manage to build reliable chips even though the underlying physical mechanics we abstract over are tremendously complexpic.twitter.com/ESbBbYQKgB

      2 replies 4 retweets 3 likes
      Dan Luu‏ @danluu May 15
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      Replying to @danluu @hillelogram

      The big productivity boosts have been abstractions that hide but don't eliminate underlying complexity. Gate-level design instead of transistor-level design, RTL instead of schematic capture, synthesis instead of doing raw circuit design, etc.

      8:13 PM - 15 May 2019
      • 2 Retweets
      • 7 Likes
      • David Gregory Tim the Enchanter Sam Bristow 🔶 Daniel Houck Rahul Malik Kevin Riggle Ian Ragsdale Hillel
      3 replies 2 retweets 7 likes
        1. New conversation
        2. Dan Luu‏ @danluu May 15
          • Report Tweet
          Replying to @danluu @hillelogram

          Later, he says you should just use data structures because they're "simple". Imagining the same idea in EE: no gates, only do layout because it's simpler. Metal, poly, and n/p-wells are "simple", why complicate things with gates? We're EEs, it's all physical layout in the end.pic.twitter.com/uEiZ1CY7Zk

          3 replies 0 retweets 5 likes
        3. Dan Luu‏ @danluu May 15
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          Replying to @danluu @hillelogram

          As for software, why have data structures? Memory is actually very simple. There are not a tremendous number of variations in the essential nature of memory. There are locations that contain addresses. There are locations that contain values. There are not a lot of other concep

          1 reply 0 retweets 4 likes
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        1. Matt Ginzton‏ @metamatt May 15
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          Replying to @danluu @hillelogram

          For software, I'm with Ousterhout (https://www.goodreads.com/book/show/39996759-a-philosophy-of-software-design …) - complexity is going to be somewhere; you win if you can corral a bunch of it in one place and present a simple interface to it.

          0 replies 0 retweets 1 like
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        2. Ron Pressler‏ @pressron May 16
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          Replying to @danluu @hillelogram

          If only there was a discipline studying complexity it could perhaps tell us that the effort required to understand the composition A₁ ∘…∘Aₙ is not only not polynomial in n, but not even exponential. Actually, there *is* a discipline that's shown us that: computer science.

          1 reply 0 retweets 0 likes
        3. Ron Pressler‏ @pressron May 16
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          Replying to @pressron @danluu @hillelogram

          Of course, such results mean that all conversations on the virtues of different kinds of composition are no more than hand-waiving, and, at best, empirical (which would actually be great, but almost none of them are).

          1 reply 0 retweets 0 likes
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