Newest questions tagged javascript - Stack Overflow • 2026-04-28 10:17

Base64 string in JSON POST mutates mid-payload between browser and Node — same length, same head, same tail, different SHA-256

I'm shipping a base64-encoded JPEG (~120 KB) from the browser to a Node.js origin inside a JSON request body. To debug a downstream corruption issue I added matching SHA-256 fingerprints on both sides, hashing the exact same base64 substring (everything after ;base64, in the data:image/jpeg;base64,… URL). Here is the result for one submission: Field Client (Web Crypto) Server (Node crypto) ...

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newest submissions : multi • 2026-04-28 10:14

I’m looking for useful *niche tools that look GOOD

Enlighten me reddit, I need some GOOOOD stuff. Anything, any type of tool, just the best of the best submitted by /u/itsxtra7 to r/software [link] [comments]

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DEV Community • 2026-04-28 10:13

How to Trim and Cut Video with FFmpeg (CLI + API Guide)

Originally published at ffmpeg-micro.com. You need to extract a 30-second clip from a 2-hour video. Or trim the first 5 seconds of dead air. Or cut everything after the outro. FFmpeg handles all of this, but the syntax trips people up more than it should. This guide covers every way to trim and cut video with FFmpeg, from basic -ss/-t flags to keyframe-accurate cutting. Then we'll show how to do...

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DEV Community • 2026-04-28 10:13

Python Type Hints That Actually Catch Bugs (Not Just Satisfy mypy)

Most type hint guides teach you syntax. This one is about which annotations actually prevent bugs. After two years of adding types to codebases that didn't have them — and watching which annotations caught real issues and which were just ceremony — I've settled on four patterns. They're not the four most commonly taught. They're the four that have caught production bugs before they shipped. ...

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DEV Community • 2026-04-28 10:11

SQL Subqueries vs CTEs: What I Wish Someone Told Me When I Was Learning SQL

When you first start learning SQL, everything feels simple. You write basic SELECT queries, maybe add a WHERE, and life is good. Then suddenly you meet things like subqueries and CTEs, and it feels like SQL switched languages overnight. I remember staring at nested queries thinking, “Why would anyone write a query inside another query?” Turns out… there’s a reason. And once it clicks, it actual...

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DEV Community • 2026-04-28 10:11

AI didn't save $500k. A test suite did.

Behind every successful AI rewrite story, there is an unsung hero. And it's never the AI. Chances are you've already come across the Reco story. Their AI tool rewrote JSONata from JavaScript to Go in a day or so. The end result? Half a million dollars per year less on infra costs. Insane. Blog gold. Yet, I can't stop ruminating on the part no one really shared. The real MVP wasn't the ...

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Newest questions tagged reactjs - Stack Overflow • 2026-04-28 10:08

open WeChat app directly from ReactJS app for seamless integration

i have CRM dashboard made with ReactJS, client asks for integration with WeChat so he is able to send invoice data to WeChat as a .xlsx file, doing research i read that we can't open WeChat directly from ReactJS app, but user must be running inside WeChat browser, so the solution i come up with is ReactJS app provides user with download link for the file that contains invoice data, and then prompt...

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Hacker News: Front Page • 2026-04-28 10:08

The Social Edge of Intellgience: Individual Gain, Collective Loss

Article URL: https://www.theideasletter.org/essay/the-social-edge-of-intelligence/ Comments URL: https://news.ycombinator.com/item?id=47932446 Points: 6 # Comments: 0

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DEV Community • 2026-04-28 10:07

🔐 From Passwords to Private Keys: Understanding Solana Identity the Web2 Way

📦 Account = Your Database Record (Owned by You) In Web2: Your data lives in a database row (e.g., user profile, balance) The company owns and controls that database In Solana: An account is a fundamental unit for storing state on a blockchain network It can store: SOL balance Token balances App-specific data (like profile, game state, etc.) 👉 Key shift: In Web2 → company owns ...

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DEV Community • 2026-04-28 10:07

Map and Set in JavaScript

Javascript comes from a long days where we manage everything with just objects and arrays, in ES6 a map and set data structures are introduced which provide more specialized ways to handle data collections. Here are break down of how they work and why they matters: Content List What Map is What Set is Difference between Map and Object Difference between Set and Array When to use Map ...

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DEV Community • 2026-04-28 10:03

CLAUDE.md for Node.js: 6 Rules That Stop AI From Generating Bad Backend Code

CLAUDE.md for Node.js: 6 Rules That Stop AI From Generating Bad Backend Code You ask Claude to "add a POST /users endpoint" and you get back: A .then().catch() chain mixed with await in the same function res.status(500).send(err.message) leaking stack traces in production User.create({ ...req.body }) happily writing whatever the client sent Inconsistent JSON shapes across routes (on...

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An update on GitHub availability
The GitHub Blog • 2026-04-28 10:01

An update on GitHub availability

Here’s what we’ve done—and what we’re still doing—to improve our availability and reliability. The post An update on GitHub availability appeared first on The GitHub Blog.

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DEV Community • 2026-04-28 10:00

4 Security Headers Every Website Should Have

4 Security Headers Every Website Should Have As web developers and agencies, we're constantly building and optimizing. While performance and features get a lot of attention, security can sometimes take a backseat. This is a mistake. Implementing a few key HTTP security headers is a relatively low-effort, high-reward way to significantly improve your site's defense against common attacks...

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DEV Community • 2026-04-28 10:00

We Ditched RabbitMQ for Kafka 4.0 and Cut Our Message Processing Latency by 55%

After 18 months of battling 2.1-second p99 message processing latency with RabbitMQ 3.12, our team migrated to Kafka 4.0 and slashed that metric by 55% to 945ms, while reducing infrastructure costs by 32% in the first quarter post-migration. This isn't a marketing pitch—it's a data-backed breakdown of why we made the switch, how we executed the migration without downtime, and the exact benchmarks ...

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18m read
DEV Community • 2026-04-28 10:00

The Future of Android is Local: How to Run Custom LLMs (Llama, Gemma) On-Device with MediaPipe and Kotlin

For years, the promise of Large Language Models (LLMs) in the mobile ecosystem has been tethered to the cloud. We’ve treated these powerful models as remote black boxes, accessed through REST APIs and hidden behind paywalls. While this "Cloud-Centric" approach allowed us to tap into the power of GPT-4 or Claude, it came with a heavy price: high latency, a mandatory internet connection, and signifi...

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Shopify UX Mistakes That Were Costing Me Sales
DEV Community • 2026-04-28 09:59

Shopify UX Mistakes That Were Costing Me Sales

When my Shopify store started getting consistent traffic but still struggled to generate sales, I initially assumed the problem was my marketing. I believed I needed better ads, stronger messaging, or more visibility to improve results. From the outside, everything looked fine: visitors were coming in, products were being viewed, and the store was functioning as expected. However, when I starte...

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DEV Community • 2026-04-28 09:58

I Built a macOS App to Detect Fake Lossless Audio

A WAV file is not always what it claims to be. If you download a track labeled .wav from a music store, you assume it's lossless — uncompressed PCM audio, bit-for-bit identical to the original master. Sometimes it is. Sometimes it's an MP3 that someone converted to WAV, either by accident or to make it look higher quality than it is. The file size looks right. The bit depth looks right. Your media...

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Grok tells researchers pretending to be delusional ‘drive an iron nail through the mirror while reciting Psalm 91 backwards’
newest submissions : multi • 2026-04-28 09:55

Grok tells researchers pretending to be delusional ‘drive an iron nail through the mirror while reciting Psalm 91 backwards’

submitted by /u/Wagamaga to r/technology [link] [comments]

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How to Process Azure Cosmos DB Change Streams in Parallel with Java (and Stop Leaving Throughput on the Table)
DEV Community • 2026-04-28 09:51

How to Process Azure Cosmos DB Change Streams in Parallel with Java (and Stop Leaving Throughput on the Table)

You have a Cosmos DB collection with dozens of physical partitions and millions of documents. You need to migrate them or stream changes in real time to another system. You open a single change stream cursor and watch it crawl through one partition at a time, burning hours that should take minutes. The bottleneck isn't Cosmos DB. It's the single-threaded cursor you're reading with. Cosmos DB shar...

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newest submissions : multi • 2026-04-28 09:49

HideMyData - Open Source sensitive data redaction

As a small weekend project I made this macOS app, for personal data redaction from PDFs, images, scanned PDFs. I think it's pretty niche, you will either find it useful or not at all. I got annoyed with manual redaction, as I need to do a lot for work. What it does: Uses OpenAI 1.5b privacy-filter model for automated redaction of PII data (MLX framework, OpenMed 8bit model). Uses regrex for thing...

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