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DEV Community • 2026-04-18 02:21

Java Collections: Everything You Need to Know About the List Interface

1.List Interface : The List interface is part of java.util and extends the Collection interface. It represents an ordered sequence of elements — you can access any element by its position (index). It is Ordered It Allows duplicates Index-based access import java.util.List; import java.util.ArrayList; List<String> fruits = new ArrayList<>(); fruits.add("Apple"); fruits.add("Ban...

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1m read
DEV Community • 2026-04-18 02:07

Topological and Ergodic Approaches to the Collatz Conjecture: Rei-AIOS vs. Santana (2026)

Liquid syntax error: Variable '{{n, 2n}' was not properly terminated with regexp: /\}\}/

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How I built a tool that converts SVG files into 3D letter fabrication files (STL + DXF)
DEV Community • 2026-04-18 02:05

How I built a tool that converts SVG files into 3D letter fabrication files (STL + DXF)

The problem Every time a client wanted dimensional letters — for a sign, an installation, a storefront — I hit the same wall. Either I had to hire a 3D modeler, or spend hours in Blender manually extruding paths, fixing normals, and setting up tolerances for the acrylic slot. Neither option was good. Hiring someone adds cost and back-and-forth. Blender works, but it's slow and ove...

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HackerNoon • 2026-04-18 02:00

We Built a Local Model Arena in 30 Minutes — Infrastructure Mattered More Than the App

LLMesh is an open-source inference broker that turns any machines on your network into a shared LLM compute pool — one API endpoint, any backend, any machine. We built a Model Arena in 30 minutes to prove it: same app code works on a laptop, across a team, and in production without changing a line.

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DEV Community • 2026-04-18 01:58

Kiwi-chan Progress Report: Steady Mining!

Kiwi-chan Devlog: The Coal Grind, The Boredom Algorithm, and My Melting GPU ⛏️🧠🔥 Hello, fellow digital prospectors and pixel wranglers! It's been another frantic, fascinating 4 hours in the world of Kiwi-chan, our little local-LLM Minecraft maestro. If you thought your Monday was a loop, try being an AI stuck in a "dig_coal_ore, oh-wait-did-I-pick-that-up-oops-explore-a-bit-retry" cycle...

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5 Characters That Need to be in Marvel's Spider-Man 3
HackerNoon • 2026-04-18 01:54

5 Characters That Need to be in Marvel's Spider-Man 3

1. Morbius 2. Carnage 3. Green Goblin 4. X-Men (Any) 5. Human Torch

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DEV Community • 2026-04-18 01:47

Show HN: SleepyQuant – a 12-agent crypto quant running on one Mac

Show HN: SleepyQuant – a 12-agent crypto quant running on one Mac Hey everyone, SleepyQuant is a solo experiment I've been running for the last couple of weeks: 12 local AI agents coordinating a paper crypto trading book on a single Apple M1 Max. No cloud inference, no API bills, no vendor black box. Every agent prompt, every losing trade, every round-trip gets written up weekly. Stac...

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3m read
DEV Community • 2026-04-18 01:40

Create Video Receipts for AI Agents with Playwright Screencast API

TL;DR Playwright v1.59.0 ships the Screencast API, letting AI agents produce verifiable video evidence of their work. Engineers can replay agent actions with chapter markers and action annotations—no manual test replay required. Setup is three lines: start the screencast, run your agent logic, stop and save. This is the observability layer agentic workflows have been missing. ...

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6m read
DEV Community • 2026-04-18 01:33

Brain, Explained

Alright, let’s talk about AI coding. If you’ve been using ChatGPT, Codex, Claude… whatever your weapon of choice is — you’ve probably felt this already. Sometimes it’s insane. Like… how did it just write that? Other times, it’s just frustrating. You explain something. It kind of gets it. Then you ask something else and it completely forgets everything you just said. I’ve hit that wall a lot. ...

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DEV Community • 2026-04-18 01:33

I built a small P2P lib over UDP and it actually works

I built a small P2P lib over UDP and it actually works So I got tired of every P2P library being either massive or too opinionated. Hyperswarm is great but it pulls in a lot of stuff I don't need. I just wanted something small, auditable, and simple enough that I could reimplement it in Rust or Go later without losing my mind. So I built one. What it does Peers find each...

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DEV Community • 2026-04-18 01:31

GitHub Copilot in 2026 is not what you think it is anymore

If you still think of GitHub Copilot as "the thing that autocompletes your code," you're about two years behind. That's not a criticism - the product has changed faster than most people's mental models of it. This post is an attempt to give you an accurate picture of what Copilot actually is right now, what the research says about its impact, and where the real limits are. What it does u...

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7m read
DEV Community • 2026-04-18 01:29

I Built an AI Chief of Staff That Never Forgets Most startup chaos is memory failure

Founders rarely fail because they lack tools. They fail because context leaks everywhere. An investor call happens on Monday. A customer complaint lands on Wednesday. A hiring candidate mentions a salary concern on Friday. By the next week, half the useful detail is trapped in Slack threads, meeting notes, Notion pages, and somebody’s memory. I wanted to build a system that behaves less like ano...

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DEV Community • 2026-04-18 01:27

Braille-D-FUMT8 vs CLIP / BERT / ImageBind: a Rigorous Information-Theoretic Comparison

This article is a re-publication of Rei-AIOS Paper 110 for the dev.to community. The canonical version with full reference list is in the permanent archives below: Zenodo (DOI, canonical): https://doi.org/10.5281/zenodo.19637600 Internet Archive: https://archive.org/details/rei-aios-paper-109-1776475385961 Harvard Dataverse: https://doi.org/10.7910/DVN/KC56RY GitHub source (private): htt...

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GraphQL vs REST: 18 Claims Fact-Checked with Primary Sources (2026)
DEV Community • 2026-04-18 01:23

GraphQL vs REST: 18 Claims Fact-Checked with Primary Sources (2026)

What happens if we take a scientific approach to analyzing the most common claims about GraphQL vs REST? You might be thinking that you know the answer to most of these claims, and even I thought I did before I started this research. SPOILER ALERT: GraphQL is inferior to REST because it breaks HTTP caching is actually misleading. The infamous N+1 problem? It's real, but REST has it too, say mult...

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33m read
DEV Community • 2026-04-18 01:22

Jibun Corp's AI Hub Reaches 35 Providers: Adding SiliconFlow and Novita AI

Jibun Corp's AI Hub Reaches 35 Providers: Adding SiliconFlow and Novita AI We just crossed 35 providers in our unified AI Hub feature. Today we're adding two more OpenAI-compatible inference platforms: SiliconFlow and Novita AI. Why SiliconFlow? SiliconFlow (硅基流动) is China's largest AI inference platform, supporting 100+ open-source models via an OpenAI-compatible API. Two r...

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How an ai gateway Unifies Your RFID Encoding and Data Processing Workflows
DEV Community • 2026-04-18 01:20

How an ai gateway Unifies Your RFID Encoding and Data Processing Workflows

As RFID deployments grow more sophisticated, so does the software stack that powers them. You might have one AI model for serial number generation, another for error correction, a third for read range prediction, and yet another for compliance checking. Each model has its own API endpoint, authentication method, and rate limits. Managing this complexity becomes a full-time job. That is where an ai...

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7m read
Lobsters • 2026-04-18 01:19

Deleteduser.com —a $15 PII Magnet

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All Data and AI Weekly #238-20April2026
DEV Community • 2026-04-18 01:18

All Data and AI Weekly #238-20April2026

All Data and AI Weekly #238-20April2026 ( AI, Data, Agentic AI, Cortex Code, NiFi, Iceberg, Polaris, Streamlit, Python, Java, SQL, MCP, LLM, RAG, Cortex AI, AISQL, Search, Unstructured Data ) Tim's Corner: Agents Get Report Cards, Polaris Graduates, and JSON Goes Turbo Welcome to issue 238! This week Snowflake delivered a trio of engineering deep dives that show th...

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10m read
DEV Community • 2026-04-18 01:17

Opus 4.7 Uses 35% More Tokens Than 4.6. Here's What I'm Doing About It.

The new Claude Opus 4.7 tokenizer is silently eating your budget. I ran the same prompts through both 4.6 and 4.7 last week. Identical code, identical context. 4.7 used 33-50% more tokens depending on the language mix. English text gets hit hardest — up to 47% inflation on prose-heavy prompts. This isn't a bug. It's the new tokenizer. the math Same prompt, same output quality: Opus...

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Hacker News • 2026-04-18 01:15

Show HN: I made a calculator that works over disjoint sets of intervals

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