Challenge

Jest in Monorepos

Learn how to configure Jest to run efficiently across multiple packages in a monorepo, covering shared config, workspace-aware discovery, and CI caching.

DAG Versioning and CI/CD

How Airflow tracks DAG structure changes over time via DAG Versioning, and how to build a GitOps-style CI/CD pipeline that tests and deploys DAGs safely.

AWK and CSV Processing

Understand why splitting CSV on commas is unsafe, and learn how gawk's FPAT variable and built-in --csv mode correctly parse quoted fields, embedded commas, an…

Debugging Arduino Sketches

Practical techniques for finding and fixing bugs in Arduino sketches, from Serial.print tracing and the Serial Plotter to memory diagnosis, hardware isolation,…