Build streaming Generative UI: parse incremental JSON streams with Zod and hydrate type-safe React Server Component trees in Next.js. Continue reading Architecting Generative UI with Streaming JSON Schemas and React Server Components on SitePoint.

Imagine this… A company unveils a brand new, high-tech laser cutter. It’s cutting-edge technology (if you’ll pardon the pun): incredibly strong, incredibly practical, incredibly easy to use. People are fascinated; this is so cool! People start cutting out their designs in the laser cutter. They see ...

In this quiz, you’ll test your understanding of Null in Python: Understanding Python’s NoneType Object. Python uses the keyword None to define null objects and variables. None isn’t defined to be 0 or any other value. It’s a full-blown object and a first-class citizen of the language. By working thr...

Some of the most satisfying work I do happens one on one. You arrive with a real problem from your real job — code that will not behave, an architecture […] The post Get Python help, one on one: my coaching sessions appeared first on LernerPython.

Missing data? NumPy calls it nan. Python Pandas displays it as NaN. But: Pandas doesn’t define pd.nan or pd.NaN. NumPy removed np.NaN in version 2.0. So you have to refer […] The post NaN in Pandas: Why you need np.nan, not pd.NaN appeared first on LernerPython.

It was with conflicted feelings that I watched Aunt Julia pick and eat the last scone. Up to that moment our...

The past year has been exciting for w64devkit, which like any software distribution is never complete. Peter0x44 joined as co-maintainer, and has pushed the project in good, new directions, with ideas I would never have considered. Many of his improvements have gone back upstream, and so you may ben...

An excellent feature of Eleventy1 is the @11ty/eleventy-plugin-syntaxhighlight plugin, which adds build-time syntax highlighting support via PrismJS. Official support keeps 11ty sites from worrying about client-side bloat from JS-based highlighters and the common failure mode of over-including langu...

As a child, you drink Kool-Aid. Then somewhere along the way, you stop. Maybe you switch to sugary sodas your parents never let you drink. Realizing it's just sugar water, you switch to a healthier option. For me, it took a little longer to grow up. I had the Kool-Aid jug and matching cups, and even...

null Continue reading How to Build a Scalable SVG Icon System for Your Web App on SitePoint.

The following are my notes on discrete-time Fourier series (DTFS), as well as the discrete-time Fourier transform (DTFT). These topics serve as an important theoretical underpinning to the digital processing of signals by computers using the DFT (which will be covered in a future post). For discrete...

null Continue reading E-Signature Pricing Models That Bite in Production on SitePoint.

Set up persistent Cloudflare Tunnels with Docker Compose for local webhook debugging: no session timeouts, no port forwarding, no paid ngrok subscription. Continue reading Setting Up Cloudflare Tunnels with Docker Compose for Persistent Webhook Debugging on SitePoint.

Build a serverless P2P browser file-transfer engine with WebRTC DataChannels, bufferedAmountLowThreshold backpressure, and AES-GCM encryption via WebCrypto. Continue reading Streaming Encrypted Files P2P with WebRTC DataChannels and WebCrypto in TypeScript on SitePoint.

Build a deterministic CI/CD audit harness that checks AI coding-agent pull requests for AST prototype pollution, secret leakage, and unsafe egress before merge. Continue reading Securing AI Pull Requests: Building a Deterministic AST Audit Harness in GitHub Actions on SitePoint.

Ingest and aggregate millions of streaming events in Node.js with sub-megabyte RAM using HyperLogLog and Count-Min Sketch written in pure TypeScript. Continue reading Cutting Node.js Memory Footprint with HyperLogLog and Count-Min Sketch in TypeScript on SitePoint.

In the era of big data and artificial intelligence, data science and machine learning have become essential in many fields of science and technology. A necessary aspect of working with data is the ability to describe, summarize, and represent data visually. Python statistics libraries are comprehens...

I was working with Codex on a CQRS architectural issue, which was new for me, when something unexpected happened. Most of my experience has been in CRUD-style applications, where you read and write to the same model and the mental model is fairly straightforward: one source of truth, one path in and...

In this quiz, you’ll test your understanding of Thinking Recursively in Python. Problems often look big and scary until you break them down into chunks small enough to solve. By working through this quiz, you’ll revisit how to spot that structure, how to write the base case and recursive case of a r...

null Continue reading **Data-Driven vs Event-Driven Architecture: How to Pick the Right One** on SitePoint.

Some of the most damaging outages are the ones your monitoring never flags: a slice...

Back in January I wrote Serving Markdown for AI Agents: for every page on this blog, there’s also a .md version at the same URL, discoverable via a <link rel="alternate" type="text/markdown"> tag, so AI agents can fetch clean Markdown instead of parsing HTML. It also made me $360, via referral conve...

've been on a quest lately to reclaim my sanity at work. The latest advancement is a bot that auto-approves and merges low risk PRs with no oversight 😈

TERAZ - live collective ambient experience made with Rails & Tone.js The first time TERAZ actually worked, there were around seventy phones in the audience at the wroclove.rb conference. Before pressing start, I was still not completely sure what would happen. Local tests are one thing. Seventy peop...

Spec-driven development for AI coding agents: enforce machine-readable architectural contracts, AST linters, and test boundaries to stop drift. Continue reading Spec-Driven Development: Enforcing Architectural Contracts for Coding Agents on SitePoint.

Build resilient WebAuthn passkey recovery in Node.js with cryptographic backup codes and secure fallback flows that preserve zero-trust security. Continue reading WebAuthn Passkey Recovery: Building Account Fallbacks and Backup Codes in Node.js on SitePoint.

Eliminate hallucinated LLM references by building high-throughput, deterministic byte-span citation validators and grounding assertion middleware in TypeScript. Continue reading RAG Citation Verification: Building Deterministic Byte-Span Validators in TypeScript on SitePoint.

Build a safer AI agent harness with Jev and LangChain: route simple work to cheaper models and gate sensitive tool calls behind explicit risk decisions. Continue reading Build a Safer AI Agent Harness with Jev and LangChain on SitePoint.

Build a context compaction gate for AI agents: classify each tool output as keep, summarize, or discard before the next LLM turn, cutting token bloat and noise. Continue reading Build a Typed Context Compaction Gate for AI Agents on SitePoint.