标签：#programming

submitted by /u/fagnerbrack [link] [留言]

An app called ToneAdapt is pulling in roughly $25K/month, five months after launch, built by one person with no funding and no team. It solves one narrow problem: guitarists want to sound like their favorite recordings, but tutorials and gear reviews rarely match what's actually sitting in their room. Input your guitar, amp, and pedals, pick a song, and it spits out the exact settings to get there. It's not a big, category-defining idea. It's a small, sharp one, solved well, and marketed relentlessly. That combination is worth breaking down. The Numbers The founder shared these publicly: combined web and mobile revenue is running around $25K/month, split roughly evenly between a Stripe-powered website and a mobile app on RevenueCat. Mobile has under 400 active subscribers. Pricing is aggressive for a mobile app, $10/week, or about $60/year, which works because it's solving a moment of real frustration rather than sitting as a passive subscription people forget about. Worth noting: these numbers come from a founder interview, so treat them as a snapshot of where the business was at that point rather than a live dashboard. The shape of the story, fast growth on a narrow niche with aggressive pricing, is the part worth paying attention to. Marketing: Almost Entirely UGC The founder posted three times a day across Instagram, TikTok, YouTube, and Facebook. Most of it didn't land. Once a specific format started converting, he stopped experimenting and went all-in, bringing in UGC creators and running paid ads on top of the format that already worked. That's the actual playbook: post relentlessly, watch for the one format that converts, then stop spreading effort thin and pour it all into what's already working. The Pattern Behind It The reason this works isn't guitar tone specifically. It's a translation problem: someone sees a result they want, but the instructions that got that result assume gear they don't have. The gap between "here's what worked for them" and "here's

Meet unzstd - a pure Java Zstandard (zstd) decoder for Android and the JVM. What looked like a simple dependency turned into a surprisingly difficult problem. I needed to decompress zstd-compressed datasets in an Android app. Existing options all had major trade-offs: aircompressor 2.x depends on "sun.misc.Unsafe", which crashes on Android ART. aircompressor 3.x moved to "java.lang.foreign", which Android doesn't support. zstd-jni works well, but requires native ".so" files, ABI-specific packaging, and brings additional complexity with newer Android memory page requirements. I had to build a pure Java alternative so I ported aircompressor's decoder The result: ✅ No native code ✅ No "Unsafe" ✅ No "java.lang.foreign" ✅ Android API 26+ ✅ JVM 9+ ✅ Zero "Unsafe" references in the compiled bytecode (verified) To make sure it was actually correct, I differentially tested it against libzstd across compression levels 1-22, covering one-shot decompression, streaming, fuzzing, and corruption-boundary tests. It's decode-only, Apache 2.0 licensed, and completely open source. If you're building Android or Java applications that consume zstd-compressed data, I hope this saves you a few days of debugging. implementation("com.qyntrax:unzstd:0.1.0") GitHub: https://github.com/mbobiosio/unzstd Feedback, bug reports, and contributions are always welcome. Android #Java #Kotlin #OpenSource #JVM #Zstd #Compression

submitted by /u/CircumspectCapybara [link] [留言]

submitted by /u/derjanni [link] [留言]

I've spent my career helping people build software. This is a series of letters about what happens when the tools for building change faster than the principles behind building. Each one is a reminder that while the technology changes quickly, the questions that matter often stay the same. -- Dear past Jenna, The thing that drew you to tech in the first place, that it's always changing, is the thing that will keep you here. Tools change (sometimes for the better and sometimes not) almost weekly. People who never consider themselves technical, much less a developer, will build apps in an afternoon with this new programming language called English. Products will go from idea to deployed before you finish your first cup of coffee (you have a toddler now, so you rarely get the full cup before it goes cold anyways). "I don't know how to code" or "I'm not technical" is no longer a barrier to building. And that's exciting, given you've focused nearly your entire career helping others build software. But we can't confuse the ability to build with the wisdom to build. One of the most valuable habits you've developed over the last two decades is asking a simple question: "Should we build it?" For most of your career, "Can we build it?" was a hard question. Time, budget, complexity, maybe the tech wasn't there yet. But those constraints were usually temporary. With enough people, time, and money, just about anything is possible. But the real questions were always: Should we build this? Is this the best use of our time? Does this solve a problem our customers actually need solved, or does it create new problems? What are we choosing not to build? Those questions haven't changed, but the environment around them has. Today, almost anyone can build software. Between tools like Lovable, Bolt, Replit, Claude Code, Codex, and whatever's next, the barrier to building software is lower than it's ever been. Now the question "Can we build it?" is too easy to answer. It's almost always ye

The talk host explains how ASTs work and shows how to build them step by step. submitted by /u/Kabra___kiiiiiiiid [link] [留言]

A request starts at 10:00:00.900 and finishes 200 ms later. Your latency log says -800 ms . That sounds impossible until the machine corrects its clock between the two reads. Then ordinary code turns an adjustable wall clock into a broken stopwatch. The subtraction that works—until it does not This is probably hiding in one of your metrics helpers: async function timed ( operation ) { const startedAt = Date . now (); const result = await operation (); return { result , durationMs : Date . now () - startedAt , }; } Most of the time, this reports a sensible number. That is what makes it dangerous. Date.now() answers a calendar question: how many milliseconds have passed since the Unix epoch according to this machine? The answer must remain comparable with logs, users, and other computers, so synchronization software is allowed to correct it. A correction can change its rate, jump it forward, or move it backward. If either correction lands between the two calls, the subtraction measures the clock adjustment as if it were work. A timestamp is a coordinate. A duration is a distance. They need different instruments. Your computer already has two kinds of clock Operating systems expose several clocks, but two mental buckets cover most application code: Question Clock JavaScript example “When did this happen?” Wall clock Date.now() , new Date() “How long did this take?” Monotonic clock performance.now() A wall clock follows civil time. It has an epoch and can be serialized as an ISO timestamp. A monotonic clock starts at an arbitrary origin and promises that later readings will not be lower than earlier readings. wall: 1000 ── 1001 ── 0998 ── 0999 clock correction monotonic: 40 ───── 41 ───── 42 ───── 43 On Linux, CLOCK_REALTIME is settable wall time . CLOCK_MONOTONIC cannot be set and does not make discontinuous jumps backward, although gradual frequency adjustment can affect its rate. Linux even has CLOCK_BOOTTIME for a monotonic counter that includes suspended time. Thre

submitted by /u/shintoist [link] [留言]

submitted by /u/joladev [link] [留言]

How I Built a Full-Stack Quality Skill for AI Coding Agents AI coding agents are getting very good at writing code. But I kept running into the same problem: They can move fast, but without strong project rules they can also create messy architecture, duplicate utilities, inconsistent APIs, weak security checks, and frontend components that slowly drift away from the design system. So I built Full-Stack Quality Skill . It is a reusable AI coding skill for full-stack audits, architecture guidance, long-term project memory, and CI quality gates. Repo: https://github.com/lablnet/full-stack-quality-skill Website: https://skills.lablnet.com Why I Built It When I use AI agents like Cursor, Codex, Claude Code, Antigravity, or similar tools, I do not only want them to "write code". I want them to think like a careful senior engineer: Is the database normalized correctly? Are backend layers clean? Is business logic leaking into controllers? Are frontend components consistent? Are Vue components using composables? Are React components using hooks correctly? Are HTTP methods and status codes right? Is GraphQL safe from N+1 problems? Are security and privacy risks checked? Are tests missing for critical paths? Is documentation still matching the code? That is a lot to remember every time. So instead of repeating the same instructions in prompts, I turned them into a reusable skill. What It Covers The skill includes audit areas for: Database Backend Frontend Mobile HTTP APIs GraphQL Security Privacy Accessibility i18n Analytics Background jobs Infrastructure Testing Performance Observability Delivery / CI Multi-tenancy Payments Notifications Data import/export API compatibility Developer experience AI/LLM safety It also includes examples for common stacks: Node.js / TypeScript Python Django Laravel Java / Spring C# / ASP.NET Core Go Ruby on Rails React Next.js Vue Angular SvelteKit Flutter React Native Kotlin / Android Swift / iOS SQL GraphQL Read-Only Audits by Default One impo

I spent a week using video editing Skills to build a video editing Agent. It feels amazing! It can automatically edit a 30-minute video in just 10 minutes. Video editing Agent demo: automatically editing a 30-minute video in 10 minutes. I often use CapCut to edit talking-head videos, but after using it for a long time, I found several problems. Problem 1: Smart talking-head editing does not understand meaning Because it cannot understand the meaning, it sometimes fails to identify repeated sections. If I speak continuously for 20 or 30 minutes, editing the video myself becomes exhausting. Problem 2: The subtitle quality is poor The automatically generated subtitles contain many incorrect words and typos. So I used the Skills feature in Claude Code to build a video editing Agent. The fundamental difference is simple: CapCut vs. Agent: a fixed tool vs. an adaptive assistant. The key difference is: CapCut = fixed tool + manual operation Agent = adaptive system + automatic learning I am not replacing CapCut with a better algorithm. I am replacing it with a system that can continuously improve itself. But that is not even the most impressive part. The most impressive part is this: the more I use it, the better it understands me, and the faster it becomes. Three Core Designs 1. Agent Logic It only takes four steps. Video editing Agent workflow: from the video file to the final video. 2. The Skills System At first, I put every function into one large Skill. I had to add instructions to distinguish between different tasks, which was very inconvenient. Now I have separated the five core video editing tasks into five independent Skills and placed them in the .claude/skills/ directory. This makes the structure clearer and the tasks easier to select. When I enter /v , Claude Code automatically lists the five available Skills. The list of five independent Skills. I select one, and the AI runs that Skill. Simple, right? A manual task that used to take 10 minutes now only requires

submitted by /u/BlondieCoder [link] [留言]

submitted by /u/BlondieCoder [link] [留言]

submitted by /u/writer_coder_06 [link] [留言]

OpenAI just bought a cloud company, and if you only read the headline you'd miss the point. This deal tells you exactly where AI coding is heading: out of your editor and into the cloud. Here's what happened and why it matters. What OpenAI actually bought On June 11, 2026, OpenAI announced it's acquiring Ona, a German startup you might know by its old name, Gitpod. Terms weren't disclosed, and the deal still needs regulatory approval before it closes. Ona builds secure cloud environments where code can run. That's the whole reason OpenAI wanted it. Its Codex coding agent has grown fast, now past 5 million weekly active users, up from 3 million in April, and the jobs those agents run have gotten much longer. Tasks that used to take a few minutes now stretch into hours, sometimes days. An agent that works for hours can't live on your laptop. Close the lid and it dies. It needs a persistent place in the cloud to keep running. That's what Ona gives Codex, and notably, Ona's platform can run inside a customer's own cloud, which matters for enterprises that won't send code elsewhere. Ona's enterprise usage reportedly grew 13-fold this year, with clients like major banks and pharma companies. Why this is a bigger deal than it looks For years, AI coding meant an assistant inside your editor. Autocomplete, a chat panel, quick edits. The editor was the product. That era is ending. When agents run for hours on their own, the important question isn't "how good is the autocomplete." It's "where does the agent run, and for how long." The battleground is shifting from the editor to persistent cloud execution, and OpenAI just bought its way into that fight. The wider war OpenAI isn't alone in this move, which is why it feels like a real war now. Cursor already added cloud agents that run tasks without tying up your machine. Devin, from Cognition, was built cloud-first as an autonomous engineer from day one. Anthropic's Claude Code runs long, multi-step jobs and connects into your t

Strings & Text Processing: Text Isn't as Simple as It Looks If someone asks you what's the simplest type of data in programming, there's a good chance you'll say strings . After all, they're just text. A person's name is a string. An email address is a string. A password is a string. Even the message you're reading right now is just a collection of strings. At first glance, there doesn't seem to be much to learn. You create a string, print it, compare it with another string, and move on. But after writing a few programs, things start getting... strange. You convert "hello" into uppercase, yet the original string somehow stays the same. An emoji that looks like a single character suddenly reports a length of 2 . Joining thousands of small strings together makes your program unexpectedly slower. And then someone introduces you to something called Regex , which looks less like code and more like an ancient spell. None of these are bugs. They're simply the result of how strings actually work behind the scenes. In this lesson, we'll uncover those hidden details one by one. Surprise #1: Why Didn't the String Change? Take a look at this code. const original = " hello " ; const shouted = original . toUpperCase (); console . log ( original ); console . log ( shouted ); What would you expect the output to be? Many beginners think the output will look like this: HELLO HELLO But that's not what happens. Instead, JavaScript prints: hello HELLO The original string remains exactly as it was. Why? Because strings are immutable . What Does "Immutable" Mean? The word immutable simply means: Once something is created, it cannot be changed. Think of a printed book. If you want every occurrence of the word hello to become HELLO , you don't magically change the ink that's already on the paper. Instead, you print a new copy with the updated text. Strings behave in a similar way. Whenever you use methods like: toUpperCase() toLowerCase() replace() concat() the original string stays untouch

The tutorial-to-production gap Every RAG tutorial follows the same arc. Load some...

If you have worked with APIs for a while, you have probably realized that designing an API is only...

submitted by /u/pgEdge_Postgres [link] [留言]