Technology Capsules

Regular expressions are powerful tools for matching and validating text, but they require careful construction to avoid errors and performance issues. This collection presents practical patterns for common tasks like email and IP address validation, explains how to use anchors and assertions to control matches, and highlights strategies to prevent security risks such as catastrophic backtracking. It also covers Unicode-aware techniques and testing methods to ensure reliable and efficient regex usage.

Printers seem to break at the worst moment, and often that is by design. These tactics include page counters and chip locks that halt printing with ink still inside, subscription plans and hidden fees that push you to pay more, and software that blocks repairs and cheaper third-party cartridges. You can see the game and decide how to fight back.