Key Takeaways from Day 74: IPv4 Validation Function This task features a function that splits the IP, validates each part with conditions, and returns a boolea...
Introduction When designing APIs with OpenAPI, oneOf often looks intimidating. It’s powerful, but easy to misuse—especially with PATCH endpoints. Let’s break i...
Nowadays, we’re more than just frontend developers With Next.js we build both client and server code in the same project, creating full‑stack applications with...
Introduction itty-spec is a powerful library that brings type‑safe, contract‑first API development to itty‑router. By defining your API contracts using standar...
Định nghĩa Business Rule là “quy tắc nghiệp vụ”, là những “quy định, quy tắc, luật” mà ứng dụng của chúng ta phải tuân thủ. Ví dụ: luật Việt Nam quy định người...
🎯 The Problem We All Face Picture this: You're building a multi‑platform application—a React web app, an Android mobile app, a Spring Boot backend, and maybe...
Problem Description You are given three arrays of length n that describe the properties of n coupons: - codei: a string representing the coupon identifier. - b...
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Introduction In this guide we’ll create a unified form that can handle both adding new data and updating existing data. Using a single form reduces code duplic...
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TL;DR Overly large auto‑generated configuration can crash your system. Problems 😔 - Config overload - Hardcoded limit - Lack of validations - Crash o...
Regex Regular Expressions is one of those topics that gives many developers headaches. But the truth is: Regex is not difficult — you just need to understand...
