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.
A React application’s JavaScript bundle grows with every feature, every third-party library, and every route. The bundle that was 200 KB at the MVP stage becomes 2 MB after a year of additions, and the user who only wants to view their profile is downloading the admin dashboard, the rich text editor, and the entire…
![Rust 76 🦀 Procedural Macros: Derive Macros (#[derive])](https://tuts.kandz.me/wp-content/uploads/2026/10/Screenshot_20261019_064322.jpeg)
Derive macros are the most common kind of procedural macro in Rust. When you write #[derive(Debug, Clone, Serialize)], the compiler invokes a procedural macro for each of those names, passing the token stream of the annotated item, and expects a token stream of new items to append to the surrounding module . The macro is…
A SQL query is a declaration of intent. The database is free to satisfy it however it chooses: scanning a table, walking an index, joining in one order or another, sorting in memory or on disk. The execution plan is the database’s chosen strategy, and reading it is the only reliable way to understand why…
A server-driven UI reverses the usual direction of a front-end build. Instead of shipping the markup and the styles from the client bundle, the server sends a description of the interface, and the client renders it. The description may be a JSON tree, a set of components, or a list of the Tailwind class strings….
A TypeScript file is not always compiled by the TypeScript compiler. It may be transpiled by Babel, esbuild, SWC, Vite, or any of the modern bundlers, each of which processes one file at a time and has no knowledge of the other files in the project. When a transpiler sees import { User } from…
Nuxt is the full-stack framework built on top of Vue. It takes the component model you already know and wraps it in a server engine, a routing system, and a data-fetching layer that work together without configuration. Where a plain Vue application requires you to assemble Vue Router, decide on a build tool, and wire…
In the previous chapters, you set up Angular Universal for server-side rendering and learned how hydration makes the server-rendered HTML interactive. But SSR is not the only way to deliver pre-rendered HTML. When your content is the same for every user — marketing pages, blog posts, documentation, product catalogs with stable data — rendering on…
A microservices architecture splits an application into small, independently deployable services that communicate over a network. The communication protocol matters: HTTP/JSON is flexible but lacks a strict contract, while gRPC provides a strongly typed interface defined in Protocol Buffers, generated client and server stubs, and native support for streaming in both directions. Dart’s package:grpc implements…
Docker’s CLI plugin system is the modern, supported way to extend the docker command with new subcommands. Unlike the deprecated engine plugin system, which required registering a daemon-side plugin with a manifest and Unix socket, a CLI plugin is simply an executable binary that Docker discovers and invokes. The naming convention is the entire contract:…
Node.js performance problems fall into two categories: the event loop is blocked by synchronous work, or the event loop is busy but not blocked—it is processing too many callbacks, or the callbacks themselves are slow. The distinction matters because the tools are different. perf_hooks.monitorEventLoopDelay measures the first: how long a scheduled timer has to wait…