Programming Tutorials

Problem Statement Given an array nums containing n + 1 integers where: Each integer is in the range [1, n] There is only one repeated nu

I've been watching the TypeScript Go port news since it first leaked, and I'll be honest — when they said "10x faster," I was ready to call marketing

1. Mental Model Shift {#mental-model-shift} Before you write a single line of Rust, it is worth pausing to understand why the two ecosystem

Ruby Reactor 0.4.0 introduces interrupts — the first native saga pause/resume mechanism in the Ruby ecosystem. You've built a checkout flow

By Baris Kececi, Founder & CTO at GNSAC Information Technologies In 2021, I founded GNSAC with a simple observation: most organisations learn about d

A Rails application can pass every unit test and still ship with a vulnerable gem buried three levels deep in `Gemfile.lock`. Ruby gem security is no

SQL Subqueries: Correlated, Scalar, Derived Tables & EXISTS The sql subquery is the single SQL primitive that splits junior candidates from

Designing a Low-Latency Trading Architecture for Polymarket CLOB V2 Building Institutional-Grade Prediction Market Infrastructure

This is the next entry in a build-in-public series where I extract a real, production Laravel CRM into a reusable SaaS core, one module at a time, and

What AI tool do you use every day that most people have never heard of, and why? I’m interested in discovering lesser-known AI tools that deliver real

The problem every dev hits Testing JWT auth in CI/CD sucks. jwt.io is perfect but has no API. Auth0's JWT libs need setup. Most online to

While working on UnitMorph, I noticed that one of the most frequently used conversion tools is surprisingly simple: an inch to centimeter converter.

Multiplication Operator The multiplication operator gives the product of operands where one operand is a multiplicand and another is multiplier.An ope

Let me walk you through a mess I made last month. I was building a little internal tool to extract key details from customer PDFs — things like invoi

Node.js lets us run JavaScript outside the browser. In this guide, we’ll install Node, learn the terminal, explore npm, build a real web server, under

PR #1059: Restore four QA checks the #355 atom-cutover silently dropped. We thought the atom-cutover routed QA cleanly, but it bypassed MultiModelQA.r

When starting React, understanding useState only through definitions can feel confusing. The easiest way to learn it is by building small projects. I

You want a multi-step form in n8n. Each step's dropdown depends on what the user picked or uploaded in the previous step. You search for "n8n dynamic

Most multi-agent framework reviews compare features. This post argues you should compare a different axis first: where the framework places the decom

Building Smarter Web Solutions With Simplicity [Artless Technology](https://www.artlesstech.com/) is a professional web development and software solu