I need to remember to turn off Co-Pilot before trying the "interview question of the week". Given the example input/output, pasted in as a comment, Co-Pilot correctly inferred the rest of the code. I just had to "[Enter], [Tab], [Enter], [Tab]..." about 4 times.

Tried to throw it into a single reduce.

I'm impressed by others' concise single `.reduce()` solutions. Mine turned into a nightmare of `Object.*` function calls.

I was pretty intent to do this one without a date/time library. gist.github.com/taylorreece/...

Oh interesting. I was unaware of that postfix syntax.

gist.github.com/taylorreece/...