DEV Community • 2026-04-19 19:42

Introduction to Machine Learning

What is Machine Learning? One of the many subsets of AI that focus on learning patterns from datasets to make predictions or decisions without explicit programming. By training algorithms on large datasets, these models generalize to new data, powering applications like image recognition, recommendation engines, and language models. Types of Machine Learning. 1.sup...

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# Building Solana data flows: Using n8n to automate block height extraction through GetBlock’s RPC infrastructure
DEV Community • 2026-04-19 19:42

# Building Solana data flows: Using n8n to automate block height extraction through GetBlock’s RPC infrastructure

The Solana ecosystem moves incredibly fast. With block times sitting around 400 milliseconds, anyone building automated workflows, indexing tools, or real-time analytics dashboards runs into one major challenge: RPC reliability and latency. If you depend on overloaded public endpoints, your automation is always one delay away from breaking. When a pipeline starts lagging or drops requests, the wh...

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DEV Community • 2026-04-19 19:42

Reasoning Models sind kein Upgrade, sie sind ein anderes Werkzeug

Stell dir vor, du bezahlst für ein Modell das viermal so oft falsch liegt und vierzehn mal so viel kostet wie das Standardmodell. Das klingt absurd. Und es ist passiert: In einer Evaluation von splx.ai aus 2025, die o3-pro gegen GPT-4o in einem Versicherungs-Use-Case getestet hat, verlor das "bessere" Modell auf ganzer Linie. Das ist nicht das Versprechen, das OpenAI macht, wenn es Reasoning Mode...

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Hacker News: Front Page • 2026-04-19 19:41

Blue Origin's rocket reuse achievement marred by upper stage failure

Article URL: https://arstechnica.com/space/2026/04/errant-upper-stage-spoils-blue-origins-success-in-reusing-new-glenn-booster/ Comments URL: https://news.ycombinator.com/item?id=47827029 Points: 7 # Comments: 1

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Lobsters • 2026-04-19 19:39

corpus: self-hosted listenbrainz and last.fm frontend

Works as a self-hosted proxy that fetches listening history from either Last.fm or MusicBrainz, adds metadata from MusicBrainz (falling back to Last.fm and Discogs) and caches cover images to an S3 bucket. Everything is stored in DuckDB (each user has their own database) and it's been humming along quite well even for larger profiles (200k scrobbles). I always worry that these services can disappe...

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DEV Community • 2026-04-19 19:36

Your AI Security Problem Starts Before the Prompt

Most enterprise AI security conversations start in the wrong place. They start with the model. The prompt. The guardrails. The provider's SOC 2 report. As if risk begins the moment a token hits an LLM endpoint. It doesn't. The decisive security event happens earlier — when your system decides what the data is. If that decision is wrong, every downstream control is working from a compromised prem...

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Hacker News: Front Page • 2026-04-19 19:35

MAGA Is Winning Its War Against U.S. Science

Article URL: https://paulkrugman.substack.com/p/maga-is-winning-its-war-against-us Comments URL: https://news.ycombinator.com/item?id=47826977 Points: 17 # Comments: 0

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X-Ray Vision - jerseyctf6
DEV Community • 2026-04-19 19:35

X-Ray Vision - jerseyctf6

Challenge Overview This challenge involves finding a hidden token in a webpage's source code, decoding it using the ROT13 cipher, and using it to authenticate against an API endpoint to retrieve the flag. Key concepts: ROT13 encoding, API authentication with custom headers Step 1 – Inspect the Page Source View the page source and look through the HTML for any hidden co...

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DEV Community • 2026-04-19 19:29

Understanding Transaction Pipelines in Blockchain Systems

Transactions follow a deterministic pipeline: submit → validate → confirm No mechanism exists to bypass this flow.

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DEV Community • 2026-04-19 19:27

Show Dev: Your Face Is Now a Music Generator

The Dumbest Idea I've Shipped This Month I built a thing called The Mood Ring Playlist. It points your webcam at your face, reads your emotions, and generates a live music track that shifts as you do. Smile? Tempo kicks up, major key, bright pads. Scowl at your code review? Minor key, slower, a little more low end. Zone out completely? It drifts into ambient territory. This article is...

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DEV Community • 2026-04-19 19:25

An AI Benchmark That Tests Real Coding Workflows

Developers face a real choice: pick a coding model or agent based on synthetic benchmarks that look great but do not predict actual project work. The problem is no longer whether models can score well on those benchmarks; it's whether those scores still mean anything. Today's benchmarks test narrow skills well, but they rarely capture the full workflow of professional development. I wanted somet...

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DEV Community • 2026-04-19 19:25

Atlas

Explore Earth, One Swipe at a Time Inspiration Some of us spend hours every day scrolling. The format is compelling, and the habit is already formed. The question we asked ourselves was what if that scroll actually taught you something? Atlas takes the interaction pattern everyone already knows and fills it with things worth knowing about the planet we live on... things like...

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My Favorite OS - Jerseyctf6
DEV Community • 2026-04-19 19:25

My Favorite OS - Jerseyctf6

Step 1 – Explore Available Commands Start by running the help command in the terminal to see what actions are available. Step 2 – Log In as the Guest User Use the provided login command to authenticate as the guest user. The server responds with an automatically generated JWT. Step 3 – Decode the JWT Head to jwt.io and paste the token into the decoder. ...

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DEV Community • 2026-04-19 19:22

Your Python Workflow Crashes Between Steps. Here Is Why, and How to Fix It.

The gap between task queues and durable execution, and what fills it in 2026 Most Python applications reach for Celery when they need background processing. It is a reasonable default. It is mature, well-documented, and the operational model is familiar to almost every backend engineer in the ecosystem. The problem surfaces later, usually in production, usually at an inconvenient time. You have...

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The Atom Age Is Over. Palantir Is Recruiting for What Comes Next.
DEV Community • 2026-04-19 19:22

The Atom Age Is Over. Palantir Is Recruiting for What Comes Next.

Palantir's 22-point manifesto isn't a culture war post. It's a job description. And it's aimed at you. I write about AI as someone who spends more time on retrieval pipelines and local model deployment than on political theory. So when Palantir posted a 22-point manifesto to X yesterday — and within 24 hours half the internet had formed an opinion — my first instinct was to ignore it. That wou...

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DEV Community • 2026-04-19 19:21

Protocolo gRPC

1. Introdução O Protocolo gRPC surge como uma solução eficiente para comunicação em sistemas distribuídos, permitindo chamadas remotas de procedimentos de forma transparente e performática. Desenvolvido inicialmente pelo Google em 2015 como evolução do Stubby, o gRPC utiliza HTTP/2 e Protocol Buffers para otimizar a troca de mensagens entre clientes e servidores. Este artigo visa explor...

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Hacker News: Front Page • 2026-04-19 19:21

I wrote a CHIP-8 emulator in my own programming language

Article URL: https://github.com/navid-m/chip8emu Comments URL: https://news.ycombinator.com/item?id=47826852 Points: 5 # Comments: 0

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I built the Ansible tool I wish I had: A visual debugger and "Limits" sandbox
DEV Community • 2026-04-19 19:20

I built the Ansible tool I wish I had: A visual debugger and "Limits" sandbox

Why I built Ansible101 Every DevOps engineer knows the "Ansible Loop of Doom": Write a complex Jinja2 filter or a --limit regex. Run the playbook. Wait for the connection... Watch it fail because of a syntax error or an empty host list. Repeat. I got tired of the "trial-and-error" approach, so I built Ansible101 — a browser-only, zero-config visualizer and sandbox. 🚀 Wh...

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Hacker News: Front Page • 2026-04-19 19:18

Scientific datasets are riddled with copy-paste errors

Article URL: https://www.sciencedetective.org/scientific-datasets-are-riddled-with-copy-paste-errors/ Comments URL: https://news.ycombinator.com/item?id=47826834 Points: 13 # Comments: 0

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DEV Community • 2026-04-19 19:17

Green Habit Coach — AI-Powered Habit Analysis and Eco Coaching

What I Built I built Green Habit Coach, a web app that helps users reflect on their daily habits and get practical eco-friendly suggestions. Users can log in, fill out a short habit form, and receive an analysis result based on their lifestyle inputs. The app looks at habits such as transportation, meat consumption, air conditioning usage, disposable item usage, recycling behavior, and...

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