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https://www.kimcoder.io/A collection of technical guides and books covering software engineering topics, including Unit Testing (best practices, styles, and anti-patterns), Software Architecture 101 (layered, microservices, and space-based styles, ADRs, and leadership), Staff Engineer career development (strategy, networking, and negotiation), and JavaScript fundamentals (classes, functions, Map, Set, and Proxy).
ts-pattern is a library that brings pattern matching to TypeScript environments, allowing developers to handle complex conditional logic more concisely and safely than with standard switch or if/else statements. Key benefits include type safety through inference, exhaustive checking to prevent missing cases, and support for matching complex data structures (nested objects, arrays, tuples, sets, maps).The Reflect object provides a set of utility functions for performing basic object operations (such as getting/setting property values, manipulating prototypes, and deleting properties). It serves as a thin wrapper around internal JavaScript engine operations. Key advantages include:
in, delete) and Object methods.Object methods would throw.new.target via Reflect.construct.Software architecture leverages three primary programming paradigms to manage different aspects of a system:
goto statements) in favor of sequence, selection (if/then/else), and iteration (do/while).Technical partitioning divides top-level components based on technical capabilities (e.g., Presentation, Business Rules, Service, Persistence). This is the basis for Layered Architecture and the MVC pattern.
Advantages:
Disadvantages:
CatalogCheckout) is scattered across all technical layers.| Characteristic | Rating |
|---|---|
| Decomposition Type | Technical |
| Number of Quanta | 1 |
| Deployability | ⭐ |
| Elasticity | ⭐ |
| Evolvability | ⭐ |
| Fault Tolerance | ⭐ |
| Modularity | ⭐ |
| Total Cost | ⭐⭐⭐⭐⭐ |
| Performance | ⭐⭐ |
| Reliability | ⭐⭐⭐ |
| Scalability | ⭐ |
| Simplicity | ⭐⭐⭐⭐⭐ |
| Testability | ⭐ |
function getLogger(arg) {
function logger() {
console.log(arg);
}
return logger;
}
let fruit = 'raspberry';
const logFruit = getLogger(fruit);
logFruit(); // "raspberry"
fruit = 'peach';
logFruit(); // "raspberry" (Still prints the original value because 'arg' was a copy of 'fruit' at call time)Domain services in this architecture are coarse-grained and typically follow a layered architecture consisting of an API Facade layer, a Business layer, and a Persistence layer.
Key design characteristics include: