I made a space-filling curve:
[[[[[[[[[[[[[[[[FR]]FRR]]RRRRRRF]]FFFFFFFRR]]RRRRRRFFFFFFFFF]]FFFFFFFFFFFFFFFFFFFFFFFRR]]RRRRRRFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF]]FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFRR]]
It's not very interesting by itself (it just fills the whole screen with white) but you get cool-looking visualisations of its fractal-like structure by putting "C" at different points of the opening brackets.
[[[[[[[[[[[[[[[[F]]]]]]]]RRF[[R]R]]]]]]]]]
In fact it's kind of ironic that his first example exposes how bad this advice is: by trying to meta-game, starting from a few example data structures, he shows he completely misses the solution that is both simpler and much more performant.
https://www.npr.org/sections/thetwo-way/2017/10/20/558832090...
From a minute of googling, looks like San Diego had more dramatic results
>> It's to be expected that these cameras might have little impact on the behavior of police officers in Washington, D.C., he says, because this particular force went through about a decade of federal oversight to help improve the department.
Seems as though the D.C. PD didn't have many issues that needed correcting?
https://codepen.io/garthparkhill/pen/PyMPVR
Was hoping it would be included in the distribution, but sadly never got a response D: