I’ve been keeping a running set of technical notes on Tumblr as I work through different web development projects. Over time it has turned into a personal reference library that covers Drupal development, PHP programming, Linux server setup, and the Symfony framework. Most of these notes come from real problems I’ve solved while building or maintaining websites, so the collection keeps expanding as I learn new tools and techniques. A large portion of my notes focuses on Drupal because I spend a lot of time working with Drupal 7, Drupal 8, and the transition toward Drupal 9. I’ve documented everything from module development and data migration to caching, performance optimization, Varnish configuration, and headless Drupal workflows. Since Drupal 8 and Drupal 9 are built on Symfony, I also keep notes on Symfony concepts and PHP best practices that help improve development speed and code quality. I also write down what I learn while setting up and managing Linux servers. Many of these en...
Technical notes about past publications and work by Darrell Ulm including Apache Spark, software development work, computer programming, Parallel Computing, Algorithms, Koha, and Drupal. Source code snippets, like in Python for Spark. Retrospective of projects.