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wcrichton's profile
Will Crichton
Will Crichton
Will Crichton
@wcrichton

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Will Crichton

@wcrichton

Articulating the ineffable. Programming language theory 🤝 cognitive psychology. PhD @Stanford

he/him
willcrichton.net
Joined September 2011

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    1. Geoffrey Litt‏ @geoffreylitt 14 May 2020

      Just noticed while pair debugging: lack of live visibility in a programming env becomes more obvious when pairing. “Hey, can you check what type X is?” Live Vis takes better advantage of two pairs of eyes

      3 replies 1 retweet 19 likes
      Show this thread
    2. Geoffrey Litt‏ @geoffreylitt 14 May 2020

      Geoffrey Litt Retweeted Geoffrey Litt

      But also I guess this is more specifically an argument for Interactivity Considered Harmful and dense data displays. Dense walls of print debug output suck, but I’ve had my pair notice interesting things from that. Eyes are fasthttps://mobile.twitter.com/geoffreylitt/status/995846676177965057 …

      Geoffrey Litt added,

      Geoffrey Litt @geoffreylitt
      Print debugging has the useful property of abstracting over time, showing data from the entire run of the program simultaneously. I've never seen an interactive debugger with this feature.
      Show this thread
      2 replies 0 retweets 6 likes
      Show this thread
    3. Will Crichton‏ @wcrichton 14 May 2020
      Replying to @geoffreylitt

      Even though Dijkstra wasn't explicitly cited in Magic Ink, he actually made the same argument in Goto Considered Harmful!pic.twitter.com/2RSLMHGiCY

      1 reply 1 retweet 8 likes
    4. Geoffrey Litt‏ @geoffreylitt 14 May 2020
      Replying to @wcrichton

      Wow awesome find! The second part especially is so key. Abstracting over time is a weirdly powerful and underused idea

      1 reply 0 retweets 1 like
    5. Will Crichton‏ @wcrichton 14 May 2020
      Replying to @geoffreylitt

      I think the challenge is knowing what to show. Value of printf is you only see exactly the points (you think) you should care about. A full dump of program output is obviously too much. You probably want: 1) Smart defaults 2) Lightweight interactivity 3) Zoomable UI

      2 replies 0 retweets 3 likes
    6. Geoffrey Litt‏ @geoffreylitt 14 May 2020
      Replying to @wcrichton

      yeah, i'm lately thinking of this as: 1) built-in viz tooling at _framework_ / DSL level 2) programmer can specify vis in some lightweight way 3) authors leave behind visualizations as docs; also remix / build new vis on the fly

      1 reply 0 retweets 1 like
    7. Geoffrey Litt‏ @geoffreylitt 14 May 2020
      Replying to @geoffreylitt @wcrichton

      Geoffrey Litt Retweeted Geoffrey Litt

      eg, little sketch of that: tool where programmers can dynamically visualize various projections of Redux state (i'm cheating, these are actually hardcoded now, but seems easy to make dynamic because of the common structure of Redux apps)https://twitter.com/geoffreylitt/status/1260641012415946754 …

      Geoffrey Litt added,

      0:16
      Geoffrey Litt @geoffreylitt
      playing with showing list of todos as little dots, colored by completion status... by looking at the "todos" and "visible todos" rows, you can literally *see* for yourself how filtering works. the todos are there still there! just not visible pic.twitter.com/9iHdnWOKNW
      Show this thread
      1 reply 0 retweets 0 likes
    8. Geoffrey Litt‏ @geoffreylitt 14 May 2020
      Replying to @geoffreylitt @wcrichton

      also, i think sometimes the "actively designing a good printf" is a bit stockholm syndrome when you have a blindfold on, you gotta run careful science experiments to figure out what's going on. and it feels good to develop that skill ... or, just take the blindfold off

      1 reply 0 retweets 1 like
      Will Crichton‏ @wcrichton 14 May 2020
      Replying to @geoffreylitt

      Another blindfold is lacking a model of program comprehension. Without that, it's extremely hard to design or evaluate comprehension/debugging tools. A paper I've always wanted to write: "A Representational Analysis of Debuggers", in the mold ofhttps://www.sciencedirect.com/science/article/pii/0010027795006743 …

      4:33 PM - 14 May 2020
      • 2 Likes
      • Geoffrey Litt andrew🦆blinn
      0 replies 0 retweets 2 likes

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