Posts
Short notes on productivity, tools and technology.
- How Big Does This QR Code Need to Be: Bytes, Versions, and What Level H Costs 5 min read
- 502, 504 or 503? First work out which machine answered you 8 min read
- How to read a cron expression: day and weekday are ORed, and when the next run really is 8 min read
- How long should a password be: entropy, average guesses, and guesses per second 7 min read
- Verifying a download with SHA-256: when it does not match, look at the length first 7 min read
- URL encoding: + vs %20, whether ; splits parameters, and why a lone % throws 3 min read
- Base64 with Chinese and emoji: why btoa throws and atob returns mojibake 4 min read
- Five CSV to JSON Traps: Leading Zeros, Quotes and Newlines Inside Cells 5 min read
- How Many Working Days Until the Deadline? Three Things to Settle First 6 min read
- Convert a Unix Timestamp to Beijing Time (or Any Other Zone) 5 min read
- Hello, Vixyun! 1 min read