Dev.to·Thursday, December 18, 2025

Dev.to - Thursday, December 18, 2025

10 stories~15 min

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Stories Covered

Basics to Improve Your Reasoning

Hello, I'm Maneshwar. I'm working on FreeDevTools online currently building **one place for all dev tools, cheat codes, and TLDRs* — a free, open-source hub where developers can quickly find and use tools without any hassle of searching all over the internet.* Before answering anything, force this pause: What exactly is being asked? What assumptions am I making? What would make this answer wrong? That short pause alone improves accuracy a lot. Reasoning improves when it’s visible. When solving a

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Swift #18: Estructuras genéricas

Se puede definir una estructura genérica, definiendo el tipo de dato plantilla entre "angle-brackets" (i.e. <>) después del nombre de la estructura y antes de la llave que inicia el bloque de definición. struct MyStructure<T> { var myValue: T func description() -> String { "El valor encapsulado es: \(myValue)" } } let intInstance = MyStructure<Int>(myValue: 1) print(intInstance.description()) let stringInstance = MyStructure(myValue: "Hola") print(stringInstance.description()) Cuando

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terraform certification #4

Terraform Modules 1. What Problem Do Terraform Modules Solve? Problem in real organizations In mid to large companies: Many teams (10, 50, 100+) Each team writes their own Terraform code All teams create similar resources (EC2, VPC, RDS, EKS) Same EC2 code copied everywhere Hard to maintain No standards Security risks One change = update hundreds of files DRY = Don’t Repeat Yourself Meaning: Do not duplicate logic Write once, reuse everywhere Smaller codebase Easier main

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Build Voice AI Agents in Minutes with JustCopy.ai

The Future of App Building is Conversational Imagine building an AI assistant that can actually have conversations with your users — listening, speaking naturally, and responding intelligently. No coding expertise needed. No complex setup required. That's exactly what JustCopy.ai delivers with our new Voice AI Agent capability. Voice AI Agents bring together three powerful features: Lightning-fast speech — your AI responds in real-time, just like a real conversation Voice understanding — liste

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Webpack Fast Refresh vs Vite

This article shares what felt fastest in the day‑to‑day development of ilert‑ui, a large React + TypeScript app with many lazy routes. We first moved off Create React App (CRA) toward modern tooling, trialed Vite for local development, and ultimately landed on webpack‑dev‑server + React Fast Refresh. This article was first published on the ilert blog, and you can find the full version here. Scope: Local development only. Our production builds remain on Webpack. For context, the React team offic

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Rapid Prototyping with Retell AI: A No-Code Builder Guide to Voice Apps

Rapid Prototyping with Retell AI: A No-Code Builder Guide to Voice Apps TL;DR Most voice app prototypes fail because teams waste weeks on infrastructure instead of testing dialogue. Retell AI's no-code builder lets you ship working voice UX in hours—configure assistants, wire webhooks to Zapier, and iterate on conversation flows without touching backend code. Stack: Retell AI (voice logic) + Zapier (automation) + Twilio (optional fallback channels). Result: validate product-market f

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TrueFoundry vs Bifrost: Why We Chose Specialization Over an All-in-One MLOps Platform

The Platform Tax You've seen this pattern before: You need: A reliable way to route requests to OpenAI/Anthropic/Bedrock Sales pitch: "Here's a complete MLOps platform that also includes an AI gateway, model training, fine-tuning, Kubernetes orchestration, GPU management, agent deployment..." What you actually use: The gateway. What you pay for: Everything else. This is the platform tax. And for AI gateways, it's steep. TrueFoundry is a Kubernetes-native MLOps platform. It does a lot: Model

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The Luxury Layer

Episode I I would like to begin with a single-question survey: Do you need thinkers or doers? The likely answer is doers. So, are thinkers really needed? It is a luxury to afford employing group of thinkers. Let me clarify what I am referring to as Thinkers. You may have noticed or about to notice that in this age of AI, sooner or later, the roles or titles like Principal Engineers, Specialists, Architects, and such would be or already are reframed to be Too narrow Non-executional Redundant

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Terraform with AWS- Day1: Why Terraform Matters & How It Really Works

What Is Infrastructure as Code (IaC)? Infrastructure as Code (IaC) means you write code to create and manage your cloud infrastructure. Infrastructure as Code simply means: Using code to create and manage cloud resources Normally, to create a server or a database on AWS, you open the console and click through 10–20 screens. With IaC, you just write something like: Example: resource "aws_instance" "demo" { Why IaC approach is good to go: Repeatable And this is exactly the reason De

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Idempotency

In distributed systems, the assumption that every request reaches its destination and that every response returns to the sender is not true at all times. When a transaction, such as a $500 payment, is executed twice due to a network timeout or an retry policy, it's more than a minor bug, is a failure of system architecture. Idempotency is not optional. It is a fundamental requirement for maintaining data integrity in any environment where network partitions, client retries, and system failures a

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