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#beginners #sql #machinelearning #100daysofcode
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DEV Community · Technology

#beginners #sql #machinelearning #100daysofcode

Apr 15, 2026 · Day 4 of 30 Day 4: I wrote my first SQL queries today and suddenly data feels a lot more accessible I took a small detour from Python today but an important one. I wrote my very first SQL queries. I know what you might be thinking: isn't this an ML journey? Yes. But data for ML has...

Kanishka Shrivastava
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Senior Developers Collect Mistakes. Junior Developers Erase Them.
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DEV Community · Technology

Senior Developers Collect Mistakes. Junior Developers Erase Them.

There's a moment every junior developer knows. You open a pull request. You see a comment. Your stomach drops — not because the feedback is wrong, but because someone saw it. Most junior developers respond by working twice as hard to make sure it never happens again. That instinct feels correct....

dev koan
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I built a browser-based proof-of-presence tool
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DEV Community · Technology

I built a browser-based proof-of-presence tool

Six months of tinkering produced IRLid — two people meet, scan each other's QR codes, get a cryptographically signed receipt proving co-location within 12 metres. No app, no accounts, no biometrics, no central server. Just ECDSA P-256 and a bit of GPS, running entirely in the browser via Web Crypto...

BunHead
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First Post on DEV — A Quick Hello
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DEV Community · Technology

First Post on DEV — A Quick Hello

This is my first article on DEV.to, and I’m excited to share my learning journey here. I’m a Senior SDET with 9 years of experience in software testing and quality engineering, and I’ve recently started learning how machine learning and AI systems are built, deployed, and tested. Through this series...

Hemalatha Nambiradje
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Are ClickHouse JOINs Slow? A 2026 PR-by-PR Analysis
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DEV Community · Technology

Are ClickHouse JOINs Slow? A 2026 PR-by-PR Analysis

TL;DR The narrative that "ClickHouse can't do JOINs" is outdated by four years and 50+ merged PRs. From 2022 to 2026, ClickHouse's join subsystem was rebuilt from the ground up, and the evidence is in the commit history. We analyzed 50+ GitHub pull requests, official ClickHouse changelo...

Manveer Chawla
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Have you started yet, Bobby?!
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DEV Community · Technology

Have you started yet, Bobby?!

This blog has been a long time coming. I know the irony in that phrasing, but it's true. For those of you who don't know me, I'm Bobby Rivera. I've been a web developer since 2018, and, like other devs, I have a long list of side projects I've been wanting to work on for a while. I've even gotten a...

Bobby Rivera
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MAGA Is Starting to Look Beyond Trump
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Wired · Technology

MAGA Is Starting to Look Beyond Trump

A seemingly endless torrent of criticism directed toward Trump from former MAGA allies suggests the president is losing support from his base.

David Gilbert
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My Notes: Makemore - Character Level Language Model
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DEV Community · Technology

My Notes: Makemore - Character Level Language Model

Introduction Character level language model that predicts the next character given previous characters. Example: For 'isabella': i likely comes first s after i a after is b after isa, and so on Representation: <START>isabella<END> 1. Loading the Dataset...

omkar
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Reel Quick - Added Docker Support
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DEV Community · Technology

Reel Quick - Added Docker Support

Date: 2026-04-15 Project: Reel Quick (FastAPI + Next.js + ARQ + Mongo + Redis + optional GPU workers) Context We containerized the stack and tried to run it in production mode with Docker Compose. Initial startup failed for both frontend build and backend runtime. Issues Found...

Farhan Munir
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Chat Platforms as System Interfaces in Modern Systems
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DEV Community · Technology

Chat Platforms as System Interfaces in Modern Systems

Chat platforms have evolved far beyond messaging tools. In modern systems they operate as interfaces between automated processes and human decision making. Slack and Discord are often treated as notification sinks. In practice they behave more like control surfaces where alerts become actions and...

Rost
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Slack Integration Patterns for Alerts and Workflows
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DEV Community · Technology

Slack Integration Patterns for Alerts and Workflows

Slack integrations look deceptively easy because you can post a message in one HTTP call. The interesting part starts when you want Slack to be interactive and reliable. This deep dive treats Slack as three different integration surfaces: Notification sink for one way alerts via incoming webhoo...

Rost
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Discord Integration Pattern for Alerts and Control Loops
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DEV Community · Technology

Discord Integration Pattern for Alerts and Control Loops

Discord becomes a serious integration surface when you treat it like one: a place where systems publish events, humans make decisions, and automation continues the workflow. This deep dive frames Discord in three modes: Notification sink for one way alerts via incoming webhooks. Command surface f...

Rost
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Modern Alerting Systems Design for Observability Teams
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DEV Community · Technology

Modern Alerting Systems Design for Observability Teams

Alerting gets described as a monitoring feature far too often. That framing is convenient, but it hides the real problem. A metric does not wake anyone up. A graph does not create urgency. A dashboard does not assign ownership. An alert does all three if the system behind it is designed well, and...

Rost
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Easy to follow Architecture Framework
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DEV Community · Technology

Easy to follow Architecture Framework

Context When I first opened TOGAF, I got stuck on a basic problem — there's no clear starting point. Every section references another. Every process assumes a governance structure most teams don't have. Same problem was with Zachman. By the time you understand them well enough to follow,...

Anna Pastushko
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How I built a Stripe Webhook in Node.js (Full Guide)
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DEV Community · Technology

How I built a Stripe Webhook in Node.js (Full Guide)

How I Built a Stripe Webhook in Node.js (Full Guide) Webhooks are essential for modern payment processing systems. In this technical deep dive, I'll show you how to implement a production-grade Stripe webhook handler in Node.js with proper security, error handling, and idempotency....

Apollo
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The Scar Spectrum
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DEV Community · Technology

The Scar Spectrum

Organizations that survive disruption carry the cost in their structure. Scar tissue is load-bearing. Removing it risks collapse; keeping it guarantees rigidity. Every surgeon knows the number: eighty percent. That is the maximum tensile strength scar tissue ever recovers compared to the original....

thesythesis.ai
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