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What is a Variable? A variable is a named container used to store data in a program. The stored value can be a number, string, object, array, or any other data type. Example: let name = " John " ; let age = 25 ; 1. var var is the oldest way to declare variables in JavaScript. It was used before the introduction of ES6 (ECMAScript 2015). Syntax var city = " Chennai " ; Characteristi...

RFP inboxes are a strange mix of urgency and repetition. One prospect sends a 60-page PDF, another sends a spreadsheet of requirements, a procurement portal forwards automated reminders, and three stakeholders reply with clarifying questions that all need the same answer. The team wants the agent to help, but the workflow is too important to hand to a chatbot with an inbox tab. The failure mode is predictable. A model summarizes the RFP nicely, then someone asks it to "just reply" to a procur...

Sparse Federated Representation Learning for deep-sea exploration habitat design with inverse simulation verification A Personal Voyage into the Abyss of Distributed AI It was 3 AM on a Tuesday when I found myself staring at a heatmap of underwater pressure distributions, generated not from oceanographic sensors but from a federated learning model I had been training for weeks. The task was deceptively simple: design a deep-sea exploration habitat that could withstand the crushi...

$ CBA : - an ARM7TDMI / GBA emulator, built from scratch Author: Aditya R Contents Introduction From the ground up What's an emulator, actually? Meet the ARM7TDMI The GBA's memory map ARM's party trick: conditional execution Genesis All about CBA File structure Workflow of CBA Instructions supported Main features How you can run CBA locally Where things stand Experience Fun stuff References Introduction ...

SEO tools are useful, but many of them are either too heavy, too expensive, or too dependent on dashboards. So I built seoextract — a simple Python CLI package that audits a website directly from the terminal and gives a clear SEO report with scores, grades, and actionable issues. The goal was simple: «Enter a website URL. Get an SEO audit. Understand what needs to be fixed.» What is "seoextract"? "seoextract" is a Python-based SEO audit tool that crawls a website and checks co...

co-written with UnitBuilds , who built most of this out loud in the comments of my last piece. I recently wrote about the $30. someone in cambodia or kenya, paid under $30 to complete a biometric verification step on behalf of a stranger, so a developer somewhere could access an ai model that's geo-blocked where they live. I framed it as exploitation. it is. but I stopped at the harvesting. UnitBuilds didn't stop there. over a series of comments, he walked through what happens after...

How our graduation project evolved into a real-world transportation management platform. Every day, thousands of employees spend hours commuting. Late buses. Unclear pickup locations. Phone calls between drivers and passengers. No visibility into seat availability. No way to know where the bus actually is. These aren't just transportation problems—they're operational problems that affect productivity, time, and user experience. As Software Engineering students, ...

How I'm Building MCP Servers for a Language Claude Doesn't Know Well Swahili has roughly 200 million speakers. It's the primary working language of East Africa. It's a UN official language. And AI models make 4x more errors in Swahili than in English. That ratio matters when you're building AI tools for people whose primary language is Swahili. The practical problem When I test mpesa-mcp with Swahili prompts, the responses are often technically correct but linguistically a...

This isn’t going to be a massively long post, but it is a critical one. There is a brutal lesson here about trying to move too fast, failing your own basic processes, and misunderstanding how AI actually manages state. If you’ve been following along, you know that getting argparse and lodash to compile natively into Go has been long and slow for the tgo project. These (to me) are foundational libraries. I use them everywhere, and I absolutely have to get them working. Yesterday, I k...

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Article URL: https://davidbessis.substack.com/p/the-fall-of-the-theorem-economy Comments URL: https://news.ycombinator.com/item?id=48758048 Points: 84 # Comments: 36

Article URL: https://www.cnbc.com/2026/07/02/alphabet-google-android-eu-antitrust-fine-4-1-billion-euro-appeal.html Comments URL: https://news.ycombinator.com/item?id=48758309 Points: 127 # Comments: 118

Article URL: https://www.theguardian.com/technology/2026/jul/02/openai-stake-us-government-ai-sam-altman Comments URL: https://news.ycombinator.com/item?id=48759623 Points: 12 # Comments: 8

Article URL: https://voidzero.dev/posts/announcing-vite-plus-beta Comments URL: https://news.ycombinator.com/item?id=48759761 Points: 4 # Comments: 0

Neo is Bhavin Turakhia’s fifth venture and his latest involving enterprise software. This time he's taking on Microsoft Office, Google Apps with AI.

Hey DEV community! 👋 Yesterday I posted about the massive technical architecture behind Wealtii , the digital asset index fund platform I spent 10 months building completely solo. We talked about the 315,000 lines of code, the Docker containers, and the autonomous execution engines. But today, I want to talk about something much harder than writing code. I want to talk about the brutal reality of launch day . If you are a solo developer, you probably know the exact trap I fell into...

The Story Begins: Why Your Upload Button Is Just The Beginning 👦 Nephew: Uncle! I finally built my RAG system. User uploads a PDF, system finds answers. Simple, right? 👨‍🦳 Uncle: (smiles knowingly) You uploaded a PDF and got an answer? 👦 Nephew: Yes! It works! 👨‍🦳 Uncle: Did you get the right answer? 👦 Nephew: Well... sometimes. Why? 👨‍🦳 Uncle: Because between "user uploads PDF" and "system creates embeddings", there are 15 critical steps. Skip even one, and your...

There's a particular kind of false confidence that comes from a green accessibility report. The CI check passes, the Lighthouse score says 100, the AXE panel is all ticks. You ship it. And somewhere, a person using a screen reader hits your component and simply can't . I've shipped that component. More than once. Here's what I learned the hard way: automated accessibility testing checks whether your HTML is well-formed, not whether your interface is usable. Those are very different questio...

AI applications often select models using quality benchmarks. Production systems also need an economic constraint. A feature that works technically can still become unsustainable when usage grows. Define a feature budget interface AIFeatureBudget { feature: string; maximumCostPerRequest: number; maximumLatencyMs: number; minimumQualityScore: number; } The budget belongs to the product feature rather than the provider. const supportReplyBudget: AIFeatureBudget = { feature: "s...

Yesterday Apple did something I've been half-expecting since I open-sourced safari-mcp : they shipped their own Safari MCP server. It landed in Safari Technology Preview 247 (July 1, 2026), built by the WebKit team. Any MCP-compatible agent — Claude, Cursor, whatever — can now connect straight to a Safari window and inspect the DOM, read the console, capture network requests, and take screenshots. I maintain a tool that does exactly this. So I did the obvious thing: I read the entire ...

If you're a software engineer, architect, engineering manager, or platform engineer, I consider the Google SRE Book to be one of the handful of books that fundamentally changes how you think about running production systems. It's available for free online: Google Site Reliability Engineering Book . Unlike many infrastructure books, it isn't about Kubernetes, AWS, or a particular technology. It's about the engineering principles behind operating systems at massive scale. What make...

EAA w polskim e-commerce: Dlaczego „div-soup” to teraz ryzyko biznesowe i jak semantyka HTML ratuje Twój budżet Meta: Dowiedz się, jak Europejski Akt Dostępności (EAA) wpływa na polskie sklepy internetowe. Sprawdź, dlaczego semantyczny HTML to klucz do zgodności i uniknięcia kar. Słuchajcie, powiedzmy to sobie szczerze: większość z nas, programistów, przez lata budowała interfejsy w stylu „div-soup”. Jeden div w drugim, div w trzecim, a na koniec dodajemy onclick do elementu, któr...

A store can keep running even when the information behind each transaction is starting to split apart. Customers keep moving through the counter, payments get completed, and the day appears normal from the outside. The problem begins when a business starts building extra checks around small issues. Stock questions move back to the shelf instead of the system. Staff rely on memory for product details, while the person reviewing the day has to connect unclear records after the business has a...

Earlier this month I shipped PayBrackets , a free calculator that tells Americans what they actually keep from their paycheck after federal tax, state tax, and Social Security take their cut. It covers all 50 states plus D.C., it has no database, no backend, no APIs, and my total running cost is the domain. I want to walk through how it's built, because the interesting part isn't the code. It's how much you can get out of very little code if the data underneath is right. Why a ta...

One of the most important, yet often underrated, topics in frontend security is Content Security Policy (CSP) . You can think of CSP as a set of instructions you give the browser, telling it what is allowed to run and what should be blocked . Let's break it down. What is CSP? Content Security Policy (CSP) is an HTTP response header that you configure on your server to tell the browser which sources are trusted for loading resources such as: JavaScript CSS Ima...

I Built 170+ Free Browser-Based Tools (No Login, No Installation) After months of development, I finally launched AllOmniTools : 👉 https://allomnitools.com The goal was simple: Create a collection of practical tools that people can use immediately without installing software or creating an account. What you'll find Developer utilities After months of development, I finally launched AllOmniTools: 👉 https://allomnitools.com The goal was simple: Crea...