[JavaScript Learning] 27 questions at GAS Sky Castle. Two-dimensional arrays, return, and missing save data

Continuing my JavaScript learning and the conquest of GAS Sky Castle. October 18, 2026. Today I progressed from Q24 to Q50.

MongoDB 9.0 does not start with 7.0 data—Exit code 62 and Date values changing in Japan Standard Time

I measured in Docker that MongoDB 9.0.4 does not start when opened with 7.0 data, and that the value of Date in server-side ...