OpenAI inks $38B AWS deal as Linux lands in your browser!

First recording of a dying human brain shows waves similar to memory flashbacks

Key Points

• First brain activity recording during death captured via continuous EEG in a clinical setting.
• Observed changes in gamma and other oscillations around cardiac arrest suggest coordinated activity persists.
• Findings published in Frontiers in Aging Neuroscience link patterns to possible memory recall processes.

Ask HN: Anyone else use FreePascal as their low level language?

Key Points

• Go was not chosen due to the absence of exceptions and classes.
• Free Pascal (FPC) was selected for classes, exceptions, mixed memory management, and cross-platform support.
• The author moved away from C/C++ after long-term use due to recurring pitfalls.

'No idea who he is', says Trump after pardoning crypto tycoon

Key Points

• Trump says he doesn’t know Zhao despite issuing a pardon.
• Zhao pleaded guilty in 2023, served four months, and left Binance’s CEO role.
• Pardon lifts some business restrictions; regulatory impact remains unclear.

The Arduino Uno Q is a weird hybrid SBC

Key Points

• Hybrid SBC with Linux and MCU in Arduino Uno form factor, running Debian and App Lab.
• Single USB-C port provides power, HDMI, and USB; often requires a hub.
• Power draw ~0.5W idle, 2–3W load; MCU cannot operate without Linux.

ECL Runs Maxima in a Browser

Key Points

• Maxima is compiled to WebAssembly via ECL for in-browser use.
• TeX-based formula rendering and gnuplot graphics are included.
• A live demo is accessible at maxima-on-wasm.pages.dev.

KaTeX – The fastest math typesetting library for the web

Key Points

• Synchronous rendering avoids page reflow and boosts performance.
• TeX-based layout delivers print-quality math typesetting.
• Supports SSR via Node.js with consistent HTML output across browsers.

Tiny electric motor outperforms record holder by 40%

Key Points

• 28 lb axial flux motor delivers 750 kW peak and 350–400 kW continuous.
• About 40% improvement over YASA’s previous 550 kW record model.
• Uses non-exotic materials; YASA supplies motors to Mercedes-AMG and Ferrari.

China intimidated UK university to ditch human rights research, documents show

Key Points

• BBC documents indicate China pressured Sheffield Hallam to stop Uyghur forced-labour research, including threats and website blocking.
• UK government intervened; then Foreign Secretary David Lammy warned China against suppressing academic freedom.
• Sheffield Hallam paused and later reinstated Prof Laura Murphy’s work, citing insurance issues before apologizing.

Linux Tidbits and Collecting Pebbles

Key Points

• /dev is devtmpfs created at boot; not on persistent storage.
• initrd vs initramfs: different formats, both used in RAM during boot.
• Aliases expand at read-time; bash -c assigns first argument to $0; rsync uses mtime.

Recantha's Tiny Toolkit

Key Points

• Organized in a Lihit Lab book-type pen case with layered sections and exterior sticky notes.
• Tools span cutting, gripping, driving, and electronics accessories, including USB cables and a microSD-to-SD adapter.
• Plans include adding an electrical-size screwdriver and tape while reducing duplicate tools to manage weight and space.

Nvidia to invest up to $1B in AI startup Poolside

Key Points

• Nvidia may invest up to $1B in Poolside, starting at $500M.
• Poolside targets a $2B raise at a $12B pre-money valuation.
• Over $1B in commitments secured, including ~$700M from existing investors.

Show HN: Centia.io – Open PostgreSQL/PostGIS back end for developers

Key Points

• Instant SQL-over-HTTP/WebSocket API backed by PostgreSQL/PostGIS.
• Secure by default with OAuth2, row-level security, and rate limiting.
• JSON-RPC method support plus OpenAPI, SDKs, and CLI for developer tooling.

Update and shut down no longer restarts PC, 25H2 patch addresses decades-old bug

Key Points

• Fix delivered via KB5067036 for Windows 11 25H2 (26200.7019) and 24H2 (26100.7019).
• “Update and shut down” now powers off after the offline update phase.
• Microsoft acknowledges and addresses the underlying issue without disclosing technical details.

Working Past 100? In Japan, Some People Never Quit

Key Points

• Japan leads the world in centenarians, both in total and per capita.
• Five centenarians profiled have never retired and link work to fulfillment.
• Longevity contributors cited include diet, healthcare, exercise, and family support.

Fish in the Wrong Place

Key Points

• An electric barrier near Chicago aims to keep Asian carp out of the Great Lakes.
• Colonial-era fish introductions and water engineering often harmed indigenous ecosystems.
• Historical case studies show severe unintended consequences from hydraulic projects.

Offline Math: Converting LaTeX to SVG with MathJax

Key Points

• Pandoc’s MathJax output breaks offline and on no-JS devices; SVG ensures portability.
• A Node.js/jsdom setup runs MathJax, blocks external URLs, and serializes to standalone HTML.
• mathjax-embed produces SVG math without JavaScript or external dependencies.

VimGraph

Key Points

• VimGraph maps Vim movements onto a graph of text characters.
• Shortest-path analysis identifies minimal keystrokes between positions.
• GraphDiameter and BarChart reveal how newline insertions change navigation complexity.

Linux running in a browser tab via WASM

Key Points

• Linux boots in-browser via Wasm with BusyBox/musl and Xterm.js.
• It’s a proof-of-concept with significant limitations and instability.
• Debugging tips and known bugs (lockups, input freeze, missing longjmp/vfork) are documented.

Google Suspended My Company's Google Cloud Account for the Third Time

Key Points

• Three unannounced Google Cloud suspensions disrupted SSLMate’s customer integrations.
• SSLMate uses per-customer service account impersonation for Cloud DNS and Cloud Domains access.
• Recovery involved blocked emails, inaccessible project IDs, phone verification, and unexplained reinstatement.

Why Nextcloud feels slow to use

Key Points

• Heavy JavaScript payloads (15–20 MB uncompressed; ~4–5 MB compressed) drive Nextcloud’s slowness.
• Core and app bundles are large: `core-common.js` 4.71 MB, Calendar 5.94 MB, Files multiple sizable scripts.
• Real-world delays observed: up to 30–60 seconds on poor connections; 5–10 seconds on mobile for Tasks.

WebAssembly (WASM) arch support for the Linux kernel

Key Points

• Patched LLVM, Linux kernel, musl, and BusyBox enable a Linux system to run natively on Wasm.
• Wasm’s no-MMU model necessitates NOMMU Linux and -fPIC/-shared binaries or a syscall-proxy alternative.
• Dockerized Ubuntu 20.04 environments and documented workarounds streamline building and running the system.

The Case Against PGVector

Key Points

• Demos and tutorials often miss production-scale realities of pgvector.
• Index choice (IVFFlat vs HNSW) requires context-specific evaluation.
• IVFFlat demands careful tuning of list count to balance recall and performance.

A Turn Lane in Rhododendron

Key Points

• Crash‑prone US‑26 segment lacked a left‑turn lane amid high driveway density, prompting a 1998 petition.
• ODOT initiated widening plans, triggering FHWA NEPA and NHPA reviews.
• Archaeological review found no evidence supporting claimed historic gravesite despite local opposition.

OSS Alternative to Open WebUI – ChatGPT-Like UI, API and CLI

Key Points

• Open-source ChatGPT-like UI, CLI, and OpenAI-compatible API for multiple LLM providers
• Cost-aware routing, automatic failover, unified model naming; 160+ models supported
• Quick setup via pip, env-based API keys, and centralized llms.json configuration

Tech workers' fight for living wages and a 32-hour workweek is a battle for all

Key Points

• Kickstarter United launched a strike Oct. 2 for a 32-hour workweek and livable wages.
• The union represents 59 Kickstarter employees across multiple functions.
• Kickstarter earns revenue via a 5% fee on pledged funds and is designated as a public benefit and B Corporation.

The Problem with Farmed Seafood

Key Points

• About 90% of forage fish are rendered into aquaculture feed.
• Peru’s anchoveta fishery collapsed in 2016 and 2023, with widespread ecological and economic impacts.
• The F3 Challenge seeks marine-animal-free feeds to reduce reliance on wild stocks and improve resilience.

Show HN: a Rust ray tracer that runs on any GPU – even in the browser

Key Points

• Three implementations: CPU, offline GPU (compute shaders), and live real-time GPU (WebGPU).
• GPU offline version is faster than CPU and supports hardware-accelerated ray–triangle intersection, outputting to PPM.
• Live renderer offers camera controls, raytracing and normals modes, and an FPS counter.

I analyzed 180M jobs to see what jobs AI is replacing today

Key Points

• Overall job postings declined 8% in 2025 vs 2024, aligning with Indeed’s 7.3% US drop.
• Creative execution roles saw the largest two-year declines (e.g., computer graphic artists -33% in 2025).
• Regulatory/environmental roles fell sharply, with accelerating declines across hierarchies.

Türkiye will not sell rare earth elements to the USA

Key Points

• Turkey will not sell rare earth elements to the United States, per the energy minister.
• State-owned Eti Mining will operate Beylikova, with a processing plant slated to be completed in about two years.
• Beylikova, discovered in 2022, is the world’s second-largest rare earth deposit; a pilot facility has operated since 2023.

Geonum – geometric number library for unlimited dimensions with O(1) complexity

Key Points

• Geonum encodes magnitude and direction via a bladed angle to enable dimension-free computation.
• Claims reduction of traditional n^k and 2^n component requirements to 2 by dualizing components.
• Rust example demonstrates projections, identity checks, and installation via cargo.

Skyfall-GS – Synthesizing Immersive 3D Urban Scenes from Satellite Imagery

Key Points

• Generates explorable 3D urban scenes from satellite imagery using diffusion models and 3DGS.
• Employs IDU with T2I diffusion and prompt-to-prompt editing to iteratively refine geometry and textures.
• Demonstrates improved cross-view consistency and realism versus state-of-the-art, with an interactive real-time viewer.

An Illustrated Introduction to Linear Algebra, Chapter 2: The Dot Product

Key Points

• The dot product is introduced as a weighted sum applied to real-world scoring.
• Scores and weights are represented as vectors and combined via the dot product.
• Adjusting weights changes results, illustrating preference-sensitive calculations.

Writing an Asciidoc Parser in Rust: Asciidocr

Key Points

• New Rust-based AsciiDoc parser called “asciidocr.”
• Decision driven by avoiding interpreted-language dependencies and seeking performance.
• Hand-written parsing approach chosen over using a library like pest.

The Continual Learning Problem

Key Points

• Sparse memory finetuning with memory layers yields far less forgetting than LoRA or full finetuning.
• Measured drops on NaturalQuestions after learning TriviaQA: 89% (full), 71% (LoRA), 11% (memory layers).
• Augmentations like paraphrasing and Active Reading improve generalization and retention in continual learning.

OpenAI Signs $38B Cloud Computing Deal with Amazon

Key Points

• OpenAI will spend $38B on Amazon cloud services over seven years.
• Microsoft relaxed exclusivity, enabling OpenAI’s multi-cloud strategy.
• OpenAI’s infrastructure expansion includes data center and chipmaker partnerships.

Ask HN: Who is hiring? (November 2025)

Key Points

• Founding Product Manager role, full-time hybrid in NYC near Union Square.
• AI + human concierge dating app live in five cities; national expansion slated for 2026.
• Backed by a16z Speedrun, M13, and early Snap angels; apply via joinsitch.com or hi@unusual.inc.

Ask HN: Who wants to be hired? (November 2025)

Key Points

• CTO candidate outlines measurable transformation outcomes and a broad enterprise/cloud stack.
• Engineer emphasizes embedded, real-time, and cross-platform capabilities with extensive hardware/software tools.
• Both candidates are open to remote work and provide direct contact information.

Is Health Insurance Even Worth It Anymore?

Key Points

• Models a 26-year-old’s costs over 35 years with 6% annual growth in premiums and cost-sharing, 4% investment returns.
• Uses Commonwealth Fund and KFF data to set initial premiums, deductibles, and a $5,456 out-of-pocket maximum.
• Highlights catastrophic risk and clarifies the exercise is illustrative, not advocacy for going uninsured.

State of Terminal Emulators in 2025: The Errant Champions

Key Points

• ucs-detect now detects DEC Private Modes, sixel, pixel size, and versions.
• Ghostty and Kitty lead in Unicode correctness, including Variation Selector 15.
• Significant performance gaps observed, with some terminals requiring reduced tests.

Learning to read Arthur Whitney's C to become Smart (2024)

Key Points

• Whitney’s 50-line C interpreter demonstrates compact, single-screen logic for a simple K language.
• kdb, built on K, is widely used in finance; Shakti targets trillion-row datasets with greater speed.
• Whitney’s languages and style are influenced by APL’s array programming paradigm.

Why We Migrated from Python to Node.js

Key Points

• Rewrote backend from Python/Django to Node.js to handle heavy async network I/O.
• Python/Django async limitations (no native async file I/O, partial ORM async) added complexity.
• Node.js’s event-driven concurrency and team familiarity supported faster iteration and scalability.

Robert Hooke's "Cyberpunk” Letter to Gottfried Leibniz

Key Points

• A 1681 Hooke-to-Leibniz letter is highlighted and linked via a Royal Society scan.
• The author’s transcription is ~90% complete and includes quotes framing mechanized reasoning.
• Future posts will expand on Hooke’s life, cryptography, and related archival materials.

Measuring characteristics of TCP connections at Internet scale

Key Points

• Cloudflare shares Internet-scale TCP connection characteristics from its CDN.
• Dataset: 1% uniform sample of TCP connections (Oct 7–15, 2025), covering HTTP 1.0/1.1/2.0.
• Telemetry aims to inform realistic simulations and accounts for collection biases.

No Socials November

Key Points

• The author commits to a month-long break from social networks in November.
• Practical steps include logging out, deleting apps, and disabling YouTube’s recommendations.
• Blogging is offered as an alternative, with a discount code for Pika.

Show HN: I was tired of wasting engineer time on screening calls so I built Niju

Key Points

• 20‑minute asynchronous coding screen with AI‑powered report enables ~5‑minute reviews.
• Claims 88% time savings, ~3x lower cost per screen ($30 vs. $88), and ~30% shorter hiring cycle.
• Focus on practical, real‑world tasks claimed to be up to 2.5x more predictive than traditional interviews.

The Case That A.I. Is Thinking

Key Points

• Bold forecasts from A.I. leaders contrast with limited consumer A.I. tools.
• LLMs demonstrate strong coding capabilities, accelerating development.
• A.I.’s benefits are unevenly distributed; effective use requires verification and oversight.

Harder, Better, Faster, Stronger Version of Uber H3 in Rust

Key Points

• h3o is a Rust rewrite of H3 with safer APIs, WASM focus, and full H3 4.0 API coverage.
• Benchmarks across 911 cases show h3o outperforms H3 in most tests, with significant speedups.
• Testing includes extensive differential, integration, unit, and fuzz tests to ensure correctness.

Israels top military lawyer arrested after she admitted leaking video of abuse

Key Points

• Yifat Tomer‑Yerushalmi arrested after admitting to authorizing a video leak linked to alleged detainee abuse.
• Five soldiers charged following the leak; they remain unnamed and not in custody.
• Political backlash and broader accountability concerns frame the case amid the Gaza war.

Learning a Bit of VGA

Key Points

• Implemented unchained VGA Mode Y with 256K VRAM for back buffer, background, and tile pages.
• Added latched writes, screen split for HUD, and WIP 1-pixel vertical scroll.
• Enhanced 32-bit DOS library with DJGPP; features verified on a 386 at 30 MHz.

Gallery of wonderful drawings our little thermal printer received

Key Points

• Gallery of artworks printed by a small thermal printer operated by Good Enough.
• Entries credit contributors and often link to their websites or profiles.
• An info page is referenced for further details about the printer project.

Is the Internet Making Culture Worse?

Key Points

• Marx argues internet-era culture produces abundant content but fewer radical innovations.
• Attention concentrates on major players, reinforcing commercialization (“poptimism”).
• Historical context and critiques (Reynolds, Marcus) complicate claims of cultural decline.

Why Engineers Can't Be Rational About Programming Languages

Key Points

• A Takkle PHP-to-Perl rewrite caused major delays and a jump in burn, halving runway and missing the market window.
• Language debates often rely on incomplete data; the author observed this at Google, MongoDB, and Google Cloud.
• An example comparing Rust and Go shows how criteria can be misapplied, leading to flawed justifications.

The Stallman Paradox: How Web3 Became the Ultimate Open Source Theater

Key Points

• Article reports a major shift from GPL to permissive licenses since 2009.
• Base is presented as decentralized but described as controlled via a single Coinbase-run sequencer.
• Base’s reported outage during an AWS incident highlights centralized dependencies.

Show HN: Tamagotchi P1 for FPGAs

Key Points

• Supports Analogue Pocket and MiSTer with platform-specific installation and ROM requirements.
• Offers savestates, Sleep + Wake integration, and automatic restoration for seamless continuity.
• Provides turbo modes up to ~1,800x and extensive customization, including backgrounds and display options.

Wikipedia row erupts as Jimmy Wales intervenes on 'Gaza genocide' page

Key Points

• Jimmy Wales says the article’s lead violates Wikipedia’s neutrality policy by presenting a contested claim as fact.
• The page is protected amid heightened scrutiny and editorial dispute.
• Expert bodies’ conclusions and Israel’s denial are both cited, along with related ICC and ICJ actions.

The MP3.com Rescue Barge Barge

Key Points

• 1. 1.78 TB of MP3.com audio compiled from Archive.org’s Rescue Barge and the Wayback Machine.
• 2. Storage consolidated onto a 3 TB drive; local copy retained for redundancy alongside Archive.org links.
• 3. Workflow used wget for acquisition, Everything for indexing, and WACUP/Winamp (64-bit) for metadata handling.

</> Htmx – The Fetch()ening

Key Points

• fetch() replaces XMLHttpRequest, updating the events model.
• Attribute inheritance becomes explicit via the :inherited modifier.
• History restores will fetch content instead of using DOM snapshot caching by default.

FreakWAN: A floor-routing WAN implementing a chat over bare-LoRa (no LoRaWAN)

Key Points

• LoRa-based WAN for offline plaintext/encrypted chat and broader applications.
• Robust protocol with broadcast routing, retransmissions, and first-hop ACKs.
• MicroPython implementation with ESP32/LILYGO device support and clear install guidance.

S1130 – IBM 1130 Emulator in C#

Key Points

• Cross-platform .NET 8 C# emulator of the IBM 1130 with CPU, memory, interrupts, and device support.
• 335+ unit tests with benchmarks; CPU core and 2501 reader complete, 2310 disk partial.
• Includes a Web API backend and optional React frontend with clear run/build/test instructions.

2,400 HP FDNY Super Pumper could extinguish hell itself

Key Points

• Developed after the 1963 Staten Island fire exposed severe water supply limitations.
• Five-vehicle Mack Super Pumper System delivered up to 10,000+ GPM and 8,800 GPM at 350 psi.
• Powered by a 2,400-hp Napier Deltic engine; in service from 1965 to early 1980s.

AI's Dial-Up Era

Key Points

• AI’s current phase is likened to the early internet’s mix of constraints and bold predictions.
• High-profile forecasts of rapid job displacement (e.g., radiologists) have not materialized so far.
• U.S. radiology residency positions hit a 2025 record (1,208), up 4% year over year.

Agent-O-rama: build LLM agents in Java or Clojure

Key Points

• Open-source JVM library with native Java and Clojure APIs for LLM agents.
• Integrated observability, evaluation, and parallel execution with a built-in web UI.
• Deploys on Rama with minimal dependencies; example agent runs locally with OpenAI and Tavily.

Leverage Points: Places to Intervene in a System (1999)

Key Points

• Leverage points can create large systemic changes from small interventions.
• Organizations often misapply leverage points due to misguided intuition.
• The world model for the Club of Rome identified growth as a key leverage point.

Open-sourced game logic, art and Spine animations – SuperWEIRD Game Kit

Key Points

• Open-source CC0 release includes six visual styles and shop/production simulator logic.
• Built with the Defold engine; setup via Defold Editor, Spine Editor needed for animation edits.
• Demo on itch.io; full source available on GitHub with documented structure and world management.

Big Tech Needs $2T in AI Revenue by 2030

Key Points

• Big Tech’s AI capex implies a need for about $2T in AI revenue by 2030.
• Cumulative capex for Microsoft, Amazon, Google, and Meta totals roughly $776bn (2023–2025).
• Microsoft’s AI ARR briefly disclosed at $10bn–$13bn; Azure revenue includes low-margin OpenAI compute.

Guideline has been acquired by Gusto

Key Points

• Guideline is now part of Gusto; services aim to be more seamlessly integrated.
• No changes to fees, investments, or day-to-day operations; access and security continue.
• SSO with Gusto credentials enables streamlined 401(k) account access.

Maintaining a Music Library, Ten Years On

Key Points

• Device restrictions on Spotify led the author to rebuild an owned music library.
• Apple ecosystem tools (iTunes Store, iTunes Match) underpin the author’s workflow in 2025.
• Streaming remains dominant, but ownership still works despite some storefront and search limitations.

A Friendly Tour of Process Memory on Linux

Key Points

• Linux maps virtual memory to physical frames on demand using page tables and PTEs, with faults on first touch.
• VMAs structure a process’s address space; manage regions via mmap, mprotect, and munmap, mostly lazily.
• Inspect memory layout with /proc/self/maps, including vDSO/vvar; huge pages and Meltdown-related behaviors are noted.

Linkers: A 20 Part Series (2007)

Key Points

• New series will explain linkers and culminate in an essay.
• Author’s past linkers prioritized speed, with notable performance achievements.
• Current gold linker targets ELF and plans incremental linking to enhance speed.

Claude Code refused to add rainbows and unicorns to my app

Key Points

• Claude Code refused whimsical UI changes, citing professional standards for an analytics app.
• The configuration feature is complete with a minimal UI; the branch has 13 clean commits pending testing.
• The assistant proposed next steps: retest, prepare PR summary, or proceed to other tasks.

Things you can do with diodes

Key Points

• Doping creates n-type and p-type silicon enabling p–n junction formation.
• Silicon diodes conduct notably around ~600 mV forward bias with high resistance below.
• Avalanche breakdown explains reverse-bias conduction at high voltages.

Pixi: Reproducible Package Management for Robotics

Key Points

• Pixi enables reproducible, cross-platform ROS environments without Docker or Ubuntu lock-in.
• Isolated environments and lockfiles allow side-by-side ROS 1/2 and consistent builds.
• Quick start shows installing Pixi, adding robostack-jazzy, and running ROS 2 in a Pixi shell.

Handwriting Programs in J

Key Points

• J uses verbs (monads/dyads) with right-to-left evaluation and concise operators.
• Tacit definitions and forks enable compact code and interpreter optimizations.
• Tacit expressions can be represented and derived from binary tree structures.

Ask HN: How to deal with long vibe-coded PRs?

Key Points

• PR size: 9,000 LOC and 63 new files for a simple service.
• Includes a DSL parser, indicating significant added complexity.
• Seeks advice on how to review such an extensive PR.

When Stick Figures Fought

Key Points

• Shockwave Flash (.SWF) enabled the early online animation boom by working over dial-up.
• Xiao Xiao (2000–2002) became a global phenomenon via platforms like Newgrounds and Albino Blacksheep.
• Creator Zhu Zhiqiang was a self-taught animator whose work drew from action film influences.

UnitedHealth pays its own physician groups 17% more than outside ones

Key Points

• UnitedHealthcare pays Optum-owned practices 17% more on average than non-Optum practices.
• Payment premium rises to 61% in markets where UnitedHealthcare has high share.
• Findings align with STAT’s prior analysis showing large differentials for Optum practices.

Inside An Isotemp Oven Controlled Crystal Oscillator

Key Points

• OCXO107-10 provides 5 MHz output; detailed DE-9/SMA pinout and power roles.
• Warm-up draws ~320 mA on 12 V oven rail, stabilizing near 69 mA; Vref ~6.78 V.
• Measured output -1.80 dBm with second harmonic at -55.04 dBm; EFC ~2.228 V after two days.

R interface to Apple's MLX library

Key Points

• Rmlx interfaces R with Apple’s MLX for GPU-accelerated computing on Apple Silicon.
• It implements much of MLX’s C++ API, supports lazy evaluation, and mirrors base R operations.
• Installation involves installing MLX (brew or source) and then Rmlx from GitHub.

An individual can change an organization

Key Points

• Drew DeVault influenced Linode’s engineering culture through logic and persistence.
• The author learned to value reasoned debate over seniority in decision-making.
• Effective advocacy requires judgment about when to push and when to let go.

Draw high dimensional tensors as a matrix of matrices

Key Points

• Alternate horizontal then vertical stacking for each added dimension to maintain row-major order.
• PyTorch examples (0D–5D) illustrate index placement and block skipping across dimensions.
• Special case where all sizes are 2 aligns with the Morton (Z-order) curve; includes a torch.split-based exercise.

My Truck Desk

Key Points

• The author’s F-150, containing his custom “Truck Desk,” was scrapped after the engine failed.
• Work described involves disassembling a heat exchanger and using a crane for inspections.
• The author emphasizes making one’s own conditions to find time for creative work.

Why is Python's OrderedDict ordered?

Key Points

• OrderedDict persists for backward compatibility, order-aware equality, and extra features.
• Design: dict storage plus a doubly linked list and an index dict for O(1) operations.
• Key methods (__setitem__, __delitem__, pop, move_to_end) update both storage and order structures.

Why AC is cheap, but AC repair is a luxury

Key Points

• Productivity booms lower costs and increase consumption in affected sectors (Jevons Paradox).
• Wage spillovers raise costs in less productive, labor-intensive services (Baumol Effect).
• AI capex is expected to create sharp price divergences across and within jobs.