DEV BOX
Build small. Understand deeply.
Time zones, data and recovery. Practical foundations for the apps we build.
THE LIBRARY
Explore the notes02
JAVASCRIPT01
When an app's date slips by a day: separate storage time from display time
Separate a calendar date from an instant to trace an off-by-one-day bug. Follow UTC storage, Seoul display, and the trap of slicing a timestamp.
7 min read · KO / EN
SQLITE02
SQLite backups: once the file exists, try restoring it
A backup file is only the beginning. Restore it into a separate SQLite database and check structure, relationships, and expected content.
7 min read · KO / EN