sritchie

9 ms·

31.
by sritchie 4y ago
Iirc what makes rollers so tough is that the contact patch is much shorter on the roller than on the road, so the wheel turns more easily. Your reactions need to be that much quicker. I had a winter of long roller rides (3.5 hours was the l
32.
by sritchie 4y ago
Haha, I think that's what the parent was hinting at with the "depressing" title. But I disagree with the diagnosis! As Patrick Collison says, > I guess I fall somewhere in the middle in the Umberto Eco theory of the librar
33.
by sritchie 4y ago
Given Wolfram’s writing on computational essays, I don’t understand why he doesn’t publish essays like this as Mathematica notebooks, so we could play with the automata or fork the essay and explore or respond. Publish the export, of course
34.
by sritchie 4y ago
Rated on dollars per hour of brain upgrades, thinking and enjoyment, it doesn’t get better than a good book.
35.
by sritchie 4y ago
Thank you, that's really nice to read. I really leaned in to these essay-style namespaces for this project; I spent _so_ much time deciphering old numerical algorithms ported from uncommented FORTRAN, and decided that I had to go the o
36.
by sritchie 4y ago
You don't! These techniques are for getting a perfect fit.
37.
by sritchie 4y ago
Here's some Clojure code I wrote for the Emmy computer algebra system that implements polynomial interpolation with a few different algorithms described in Numerical Recipes: https://github.com/mentat-collective/em
38.
MathBox: Presentation Quality WebGL Math Graphing(github.com)
27 points by sritchie 4y ago|2 comments
39.
by sritchie 4y ago
My understanding is that Maria Montessori never copyrighted her name or method, so it's actually a free-for-all where anyone can call their toys "Montessori", like STEM, not some central organization selling merch. This goes
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Show HN: JSXGraph.cljs, Interactive Geometry in ClojureScript(jsxgraph.mentat.org)
2 points by sritchie 4y ago|0 comments
41.
by sritchie 4y ago
Haskell, Erlang, Pascal… Maria is a reference to Maria Montessori, whose educational philosophy inspired Maria.cloud.
42.
by sritchie 4y ago
It is implying that the only exotic place you're going to be able to go to indulge that desire is Disneyland, since your kids won't want to go anywhere else. Not true in reality (speaking as a dad), and there's no way to read
43.
by sritchie 4y ago
Or in any other context, for that matter!
44.
by sritchie 4y ago
I wouldn’t say it’s a given that running torches your knees - mechanics, flexibility and musculature make a big difference.
45.
by sritchie 4y ago
That’s the joke!
46.
by sritchie 4y ago
Well, there is a lot of scholarship refuting the snobby argument, including the book referenced in the reply. "Will in the World: How Shakespeare Became Shakespeare" covers this too, with lots of analysis of back and forth competi
47.
by sritchie 4y ago
Wait, the Bell Picturephone was real! https://ethw.org/Picturephone I had known for years that my grandpa Alistair Ritchie worked on this at the Labs, but the book “The Idea Factory” colored in the story with great detail o
48.
by sritchie 4y ago
I had the same reaction. I have a 3.5yo daughter now, and it feels like spending time and attention being truly interested in the things she loves is a great way to bond. The extra zing of needing to beat her is ego, and as you say feels li
49.
by sritchie 4y ago
If you want to try a literate programming take on forward-mode automatic differentiation in Lisp (Clojure), check out the Differential implementation in my sicmutils library: https://github.com/sicmutils/sicmutils/
50.
by sritchie 4y ago
If you want to try this out, give the sicmutils Computer Algebra System a go (I’m the maintainer). Repo lives here: https://github.com/sicmutils/sicmutils The library works in the browser as well, so interactive TeX re
51.
by sritchie 5y ago
Literate programming is going to feel far more powerful when we expand the definition to include: - Smalltalk-ish things like writing suites of custom viewers for various types, - demos and examples in-line inside of a library - multiple s
52.
by sritchie 5y ago
Yes, for these examples SICMUtils is handling the state updates and gives new coordinates to Mathbox to render. The library works in both JS and the JVM, so I was able to generate an unevaluated code form for the equations of motion (simpli
53.
by sritchie 5y ago
Hey, so fun to see this here! These demos feature work from https://github.com/sicmutils/sicmutils and the newly maintained-by-me Mathbox library. I’m around and happy to answer any questions about the library, future
54.
by sritchie 5y ago
Good question; I think the answer from general relativity is that it doesn't, and that those changes are propagated out locally at the speed of light. So it's a Newtonian fudge to have variables like "distance between two bod
55.
by sritchie 5y ago
That condition would fail on non-list sequences, like `numbers == (1,2,3)`; the `len` version makes the code more permissive.
56.
by sritchie 5y ago
Don't you think he does too, and is winking at you with that sentence? Especially given the spare "Remove extra words or commas whenever you can."
57.
by sritchie 5y ago
Give my SICMUtils computer algebra system a look as well, if you like Lisp / Clojure: https://github.com/sicmutils/sicmutils Works on the web too, which is a big boost for sharing work.
58.
by sritchie 5y ago
I am in Boulder too and I think the comment means, imminent in Boulder proper. But you are of course right, this is a horrifying thing happening right now for many people just a few miles away.
59.
by sritchie 5y ago
It is good enough! Almost all code forms from the book live in the tests (see the FDG directory[0], for example), and there are a few nice environments like Nextjournal[1] where everything from the books works in the browser. The Clojure po
60.
by sritchie 5y ago
I've been engaged in a 1.5 year long (so far) project to port the entirety of GJS's "scmutils" package over to Clojure, and the erratic behavior of MIT Scheme over Rosetta has been a pain I've consigned myself to fo

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