user51442

6 ms·

1.
by user51442 8y ago
Interesting historical piece from George Forsythe: http://i.stanford.edu/pub/cstr/reports/cs/tr/66/40/CS-TR-66-...
2.
by user51442 8y ago
That was weird: an hour ago I was reading "Version Control with Git" about merging and thinking "Hey, this is all just category theory", I then have a look at HN, and see this.
3.
by user51442 8y ago
Nice compendium of results. I hope the misspelling of "Isaac Newton" doesn't indicate errors elsewhere.
4.
by user51442 8y ago
Heidegger doesn't seem too far from the mark, judging by Andy Clark's 1997 "Being There": http://www2.econ.iastate.edu/tesfatsi/BeingThere.AClark1998.... The title even seems to be a nod to Heidegge
5.
by user51442 8y ago
Or Heidegger, 'being-in-the-world-with-others' & all that.
6.
by user51442 8y ago
Don't forget the Calkin-Wilf tree: http://www.cs.nott.ac.uk/~psarb2/MPC/RecountingRationalsTwic...
7.
by user51442 9y ago
Nice. An interesting challenge for someone on Shadertoy.
8.
by user51442 9y ago
"foo" occurs in the lyrics to Cab Calloway's 1939 Jumpin' Jive, as in this clip, also featuring fabulous tap dancing from the Nicholas Brothers: https://www.youtube.com/watch?v=_8yGGtVKrD8
9.
by user51442 9y ago
I should add that I have no affiliation with mathsgear, in fact, I was unaware of their existence until just now. They seem to have lots of nice stuff: https://mathsgear.co.uk/collections/shapes
10.
by user51442 9y ago
Just has to be face-transitive or isohedral for dice: https://en.wikipedia.org/wiki/Isohedral_figure For example: https://mathsgear.co.uk/products/d120-dice
11.
by user51442 9y ago
Continued fraction approximations p/q have |x-p/q| < 1/q²
12.
by user51442 9y ago
Roger Zelazny? He gives an amusing account of him and Delany signing each others books here: http://www.tor.com/2016/05/26/a-few-more-words-from-roger-ze...
13.
by user51442 9y ago
And in 3 dimensions it's points and planes that are dual - and finding the line between two points or the common line of two planes can now be done in a similar way, but using Plücker coordinates for the lines instead.
14.
by user51442 10y ago
The Universe is two's complement. Item 154 of HAKMEM: http://catb.org/jargon/html/H/HAKMEM.html
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by user51442 10y ago
Pi is ARM of course, but +1 for AVR. 6809 was nice too.
16.
by user51442 10y ago
I'd have thought AVR assembler was a better choice these days - a nice orthogonal 8-bit RISC architecture, and you can use gcc, gas etc. (as well as being able to run your code on an Arduino).
17.
by user51442 10y ago
Well, the optimizations are pretty smart to be sure, the stupid thing is that anything over 12! overflows (as GlitchMr points out). I'd like to know how the recursion to iteration step was done.
18.
by user51442 10y ago
A simple recursive factorial function: https://godbolt.org/g/97dUFg Not sure if that's smart or stupid.
19.
by user51442 10y ago
I assume you mean Jim Norton (and Marcella Riordan): https://www.youtube.com/watch?v=k-apGqB98RI
20.
by user51442 10y ago
There is a rather fine (abridged) audio book of Finnegans Wake by Jim Norton (Bishop Brennan in Father Ted), some of which is on Youtube: https://www.youtube.com/watch?v=5Ks60VrtJ4Y
21.
by user51442 10y ago
It took quite a while for Lisp to get "proper" lexical closures - not until Scheme & CL in the 1980s really, see, for example: http://www.paulgraham.com/thist.html
22.
by user51442 10y ago
..as well as "Structured Programming with go to Statements".
23.
by user51442 10y ago
The "premature optimization" quote is from Knuth's Turing Award lecture: http://delivery.acm.org/10.1145/370000/361612/a1974-knuth.pd... "The real problem is that programmers have spent fa
24.
by user51442 11y ago
Years ago I worked on an SML parser that used LR tables, on errors (ie. with no valid transition) it would try to find a symbol to insert/delete/modify that would allow parsing to continue. It dealt reasonably well with simple err