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.
Concurrent rendering is not a feature that makes React faster. It is a scheduling model that changes when React does its work. The scheduler assigns a priority to every state update, processes the highest-priority work first, and yields to the browser between small slices of work so that user input is never blocked by a…
A bare-metal Rust program runs on hardware that has no operating system. There is no main function called by a runtime, no heap allocator, no file system, and no console. The CPU powers on, reads a vector table from a fixed address, jumps to a reset handler, and begins executing your code. Everything that std…
Multi-Version Concurrency Control is the mechanism that lets a database serve readers and writers simultaneously without locking. A reader sees a consistent snapshot of the data as it existed when its query or transaction started, while a writer modifies the current version. The two never block each other because they are looking at different versions…
TypeScript gives you a type system, not a style guide. The compiler enforces that a string is not a number, but it does not enforce that your interfaces are named consistently, that your functions return early instead of nesting deeply, or that your imports are ordered in a predictable way. Those decisions are conventions, and…
Cypress is the E2E testing framework that the Angular team officially recommends for end-to-end testing. It runs in a real browser, executes the test code in the same run loop as the application, and provides a test runner that shows exactly what happened at every step. The ng add @cypress/schematic command is the official Angular…
Batching is the mechanism by which React groups multiple state updates into a single re-render. Before React 18, batching was limited to updates inside React event handlers. An update inside a setTimeout, a promise callback, or a native event listener triggered a separate render for each update. React 18 extended batching to all update sources,…
![Rust 105 🦀 Custom Memory Allocators (#[global_allocator])](https://tuts.kandz.me/wp-content/uploads/2026/10/Screenshot_20261024_075146-767x577.jpeg)
Every Box, Vec, and String in a Rust program eventually asks the global allocator for memory. By default, that request goes to the system allocator—malloc on Unix, HeapAlloc on Windows—or to jemalloc on some targets. The #[global_allocator] attribute is the mechanism that replaces that default with a custom implementation, routing every heap allocation in the…
Lock escalation, latching, and two-phase locking are three mechanisms that operate at different layers of the database engine, and confusing them is the source of many operational misunderstandings. Lock escalation is a memory optimization: when a single statement accumulates too many row-level locks, the engine converts them into a single table-level lock to reduce the…
TypeScript is a language. Architecture is what you do with it. Two codebases can use identical TypeScript features and produce entirely different results — one maintainable for years, the other collapsing under its own weight within months. The difference is not the syntax. It is the structure: how the code is organized, how dependencies flow,…
Angular DevTools is a browser extension that provides debugging and profiling capabilities specifically for Angular applications. It integrates directly into Chrome and Firefox developer tools, adding an “Angular” tab that exposes the framework’s internal state in a way that generic browser DevTools cannot. The extension is maintained by the Angular team and is available for…