Tutorials covering programming languages, type systems, architecture, tooling, and the patterns used to build software that lasts. Each chapter is standalone, built around real examples and verified facts.
Change Data Capture is the pattern of detecting row-level changes—inserts, updates, and deletes—as they happen, and streaming them to downstream systems. The two dominant approaches in relational databases are log-based CDC, which reads the database’s transaction log, and trigger-based CDC, which installs database triggers that write to an audit table. Debezium is the de-facto open-source…
Angular Schematics is the scaffolding engine behind every ng generate command. When you run ng generate component, ng add, or ng update, a schematic executes: it reads a template, applies transformations, writes files into the project’s virtual file tree, and returns the modified tree. The same engine is available to you, which means you can…
React Three Fiber is a React renderer for three.js, not a wrapper library. It does not add an abstraction layer between React and the 3D scene; it replaces the DOM as the rendering target. The component tree you write is the scene graph, and mounting a <mesh> creates a THREE.Mesh that is added to the…
A Foreign Data Wrapper is PostgreSQL’s implementation of the SQL/MED standard: a library that lets the database treat data residing outside PostgreSQL as if it were a local table . The wrapper handles the protocol for connecting to the external source, fetching rows, and returning them to the PostgreSQL executor. The postgres_fdw extension is the…
Angular CLI builders are the engines behind every ng command. When you run ng build, ng serve, ng test, or ng lint, the CLI reads the workspace configuration, resolves the target to a builder, and invokes it with the options from angular.json. A builder is a function that receives options and a context and returns…
React does not have a native canvas element. The <canvas> tag is a DOM element, and the drawing context is an imperative API that sits outside React’s declarative model. Interactivity—detecting a click on a shape, hovering over a pixel, dragging a node—requires translating DOM events into coordinates that the canvas understands, and then deciding whether…
Dynamic SQL is the construction of a SQL statement as a string at runtime, then executing it. It exists because some parts of a query cannot be parameterized: table names, column names, sort directions, and identifiers that the query planner needs to see as structure rather than data. The hazard is that the same mechanism…
Migrating from AngularJS to modern Angular is a significant architectural shift. AngularJS (1.x) reached its official end of life on December 31, 2021, which means it no longer receives security patches, bug fixes, or official support. The migration is not a simple version upgrade; it involves moving from a scope-based, controller-driven model to a component-based…
react-konva is a React renderer for Konva, the 2D canvas scene graph library. The relationship is the same as React DOM and the browser DOM: you write components like <Rect> and <Circle>, the reconciler creates the corresponding Konva nodes, and Konva draws them onto a single <canvas> element . The library’s value is not that…
Database auditing is not a single mechanism but a spectrum of approaches that differ in what they capture, where the record is stored, and whether the record can be tampered with by the same principals being audited. The choice of approach is determined by the compliance framework and the threat model, not by convenience. A…