Beating an optimising compiler at compiling division calculations: https://lemire.me/blog/2019/02/08/faster-remainders-when-the-divisor-is-a-constant-beating-compilers-and-libdivide/
(TIL that gcc, clang and libdivide use different techniques!)
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I carefully document `cargo install --locked` for difftastic users, I carefully use `--locked` for CI, and I've just realised that all my release builds totally ignore it! Oops.
Anyone using my prebuilt binaries have been getting different Unicode width calculations in display.
Hyper-G is (was?) an interesting hypertext design, where hyperlinks were stored in a separate database to ensure integrity and allow visualisations with trivial backlink calculations: https://www.ickn.org/elements/hyper/cyb20.htm
Abusing Django templatetags to calculations http://t.co/a3xHbUHF (entertainingly evil!)