Things I’d Rather Not Forget

Tokyo has many luxuries, but few are as gloriously excessive—or as delicious—as a whole Sembikiya muskmelon.

Auto-increment IDs are fast and simple—but are they the best choice for a primary key? A practical breakdown of UUID v4, UUID v7, ULID, cuid2, Nano ID, and when each makes sense.

A pragmatic explanation of how JavaScript handles values and references, with clear examples and mental models for understanding assignment and equality.

A simple, sticker-chart-inspired tool to help adults build habits, based on the same motivational trick that works for kids.

Understanding how JavaScript handles asynchronous operations through the Event Loop, Macro Stack, and Micro Stack mechanisms.

Explore Osaka Castle Park and Kaiyukan Aquarium—two must-visit family destinations in Osaka. Includes tips for access, activities, and making the most of your visit with children.