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.
The Language Server Protocol is the interface that lets editors and IDEs provide rich language features — completions, diagnostics, hover information, go-to-definition, refactoring — without implementing a language’s compiler inside the editor itself. A language server runs as a separate process, communicates with the editor through a standardized protocol, and exposes the language’s semantic model…
The mount phase, the render pipeline, and the scheduler queue are three stages of the same mechanism. The mount phase creates the component instance, runs the setup, and executes the render function for the first time. The render pipeline turns the template into a virtual DOM tree and patches it into real DOM nodes. The…
The previous chapter covered the testing infrastructure: Jasmine for the test syntax, Karma for the test runner, TestBed for the testing module, and ComponentFixture for the component wrapper. This chapter goes deeper into the two most common kinds of tests in an Angular application: component tests and service tests. They are different because components have…
A quick-reference for the Dart language, VM internals, and toolchain. No prose — just the facts. Language Basics Types & Null Safety Expression Result null is Object false null is Object? true 1 is num true 1.0 is int false List<int> is List<num> true (covariant) List<num> is List<int> false Null-Aware Operators Op Meaning ?. Null-aware…
A quick-reference for Docker commands, concepts, and internals. Organized for lookup, not for reading. Container Lifecycle Command Purpose docker run <image> Create + start container docker run -d <image> Detached (background) docker run -it <image> sh Interactive with TTY docker run –rm <image> Auto-remove on exit docker run –name foo <image> Named container docker start…
React Fiber is not a feature that application developers interact with directly. It is the internal engine that determines how and when React renders. Before Fiber, React used a recursive reconciler that walked the component tree synchronously. Once rendering began, it could not be interrupted. A deeply nested component tree or an expensive render could…
A lock-free data structure is one where at least one thread can always make progress, even when other threads are stalled, preempted, or killed mid-operation. This guarantee is stronger than a mutex-based structure, where a thread holding the lock can block every other thread indefinitely. The tool that makes lock-free programming possible in Rust is…
The storage engine is the component of a database that decides how data is physically written to disk, how it is read back, and how concurrent access is managed. The query planner and the SQL parser sit above it; the operating system and the disk sit below it. When you run SELECT * FROM users…
A TypeScript project that compiles in two seconds is a joy. A TypeScript project that takes two minutes is a productivity tax paid every time a developer saves a file, runs a test, or pushes to CI. Performance is not a feature that gets added at the end. It is a property of how the…
A quick-reference for Vue 3 APIs, reactivity, components, and internals. Organized for lookup, not for reading. Component Definition Syntax Meaning <script setup> Composition API, compiled to setup() defineComponent({}) Options API with TS support export default {} Options API object <script setup lang=”ts”> TypeScript + Composition API <script setup vapor> Vapor Mode component (Vue 3.6+) Reactivity:…