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avibryant's profile
Avi Bryant
Avi Bryant
Avi Bryant
@avibryant

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Avi Bryant

@avibryant

Happiest when working on Random Forests from random beaches.

Galiano Island
avibryant.com
Joined November 2006

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    1. Avi Bryant‏ @avibryant Sep 21

      Hypothesis: the best environments for interactive and incremental development must have semantics that are independent of the order in which code is written. This is true of Excel, largely true of Smalltalk, but not of Lisps or the various scripting language + notebook systems.

      18 replies 35 retweets 148 likes
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    2. Manuel Simoni‏ @msimoni Sep 21
      Replying to @avibryant

      hm... I always thought one of the great features of Common Lisp is that you can enter a program's expressions in pretty much any order (e.g. you can create a subclass of a class that doesn't even exist yet)

      1 reply 1 retweet 6 likes
      Avi Bryant‏ @avibryant Sep 21
      Replying to @msimoni

      interesting, maybe I have to revise my opinion of CL. Is it fair to represent a CL program as an unordered set of top-level forms, then? What happens if, eg, you try to use a macro that hasn't been defined yet, or redefine a macro after you've used it?

      3:26 PM - 21 Sep 2018
      • 1 Retweet
      • 3 Likes
      • Joshua Grochow 💻🐴Ngnghm smth funny and relevant ♻︎
      4 replies 1 retweet 3 likes
        1.  💻 🐴Ngnghm‏ @Ngnghm Sep 21
          Replying to @avibryant @msimoni

          CL has a partial order between forms, that isn't particularly amenable to static analysis, though Matt Steele did write a post facto dependency tracker using SBCL's code coverage support. Dependencies include macro definitions and compile time side effects.

          0 replies 1 retweet 2 likes
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        2. Manuel Simoni‏ @msimoni Sep 21
          Replying to @avibryant

          No, it's not possible to treat it as completely unordered, and with macros you get into implementation-specific behavior. I think implementations are allowed to ignore macro redefinitions. But in general the idea is there.

          1 reply 0 retweets 1 like
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        1. Brian T. Rice‏ @BrianTRice Sep 21
          Replying to @avibryant @msimoni

          He's talking about the subset of CLOS that supports this. CL itself doesn't really do this.

          0 replies 0 retweets 0 likes
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        1. Paul Snively‏ @paul_snively Sep 21
          Replying to @avibryant @msimoni

          See also http://nikodemus.github.io/screamer/ 

          0 replies 0 retweets 0 likes
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