Learn by problem
Technical topics
Each path brings together the tools and explanations needed to move from a focused question to a result you can verify.
- JSON from syntax to conversionLearn to validate, correct, transform, and transport JSON without losing types, precision, or meaning.
- YAML without structural or type errorsUnderstand YAML indentation, lists, quoting, and scalars before converting files or using them as configuration.
- IPv4, CIDR, and subnet calculationLearn to interpret IPv4 addresses, calculate prefixes, and verify networks, broadcasts, and usable ranges.
- Unix timestamps, dates, and time zonesConvert dates and timestamps deliberately and avoid unit, UTC, range, and leap-second errors.
- Web encoding: Base64, URLs, and JWTsLearn to distinguish text, bytes, URL components, and tokens so each layer can be encoded, diagnosed, and converted without changing meaning.