Episodes
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This week weâre going to look at the most essential piece of firmware in a programmerâs toolkit - the brain. Iâm joined by Chris Ferdinandi to explore what itâs like to be a programmer with ADHD. Itâs an unusual topic for the channel, but the more I spoke to him, the more I wanted to know what coding is like when your brain is wired differently, how we can work more effectively with people with ADHD, and critically, how you manage coders with ADHD. And the answer to that comes full circle, in understanding how coders with ADHD manage themselvesâŠ
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ADHDFTW Homepage: https://adhdftw.com/developer-voices/
Do I Have ADHD? https://adhdftw.com/do-i-have-adhd/
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Chris on Mastodon: https://mastodon.social/@cferdinandi
Chris on BlueSky: https://bsky.app/profile/cferdinandi.bsky.social
Kris on Mastodon: http://mastodon.social/@krisajenkins
Kris on LinkedIn: https://www.linkedin.com/in/krisjenkins/
Kris on BlueSky: https://bsky.app/profile/krisajenkins.bsky.social
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What have we learned from more than a decade of deploying microservices? Was it a good idea? Are we any better at figuring out what a microservice is, or where its boundaries lie? Does splitting things up create fragmentation problems? And is it too late to put the genie back in the bottle? This week weâre going to look at all these questions and more as we reflect on the lessons learnt from this big architectural idea.
This interview was recorded live at GOTO Copenhagen, with two microservice experts and thinkers: James Lewis of Thoughtworks and Ian Cooper of JustEat.
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Residuality Theory: https://leanpub.com/residuality
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Ian on Mastodon: https://mastodon.social/@[email protected]
James on BlueSky: https://bsky.app/profile/boicy.bsky.social
Kris on Mastodon: http://mastodon.social/@krisajenkins
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Kris on LinkedIn: https://www.linkedin.com/in/krisjenkins/
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Episodes manquant?
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Pony is a language born out of what should be a simple need - actor-style programming with C performance. On the face of it, that shouldnât be too hard to do. Writing an actor framework isnât trivial, but itâs well-trodden ground. The hard part is balancing performance and memory management. When your actors start passing hundreds of thousands of complex messages around, either you need some complex rules about who owns and frees which piece of memory, or you just copy every piece of data and kill your performance. Ponyâs solution is a third way - a novel approach to memory management called reference capabilities.
In this weekâs Developer Voices, Sean Allen joins us from the Pony team to explain what reference capabilities are, how Pony uses them in its high-performance actor framework, and how they implement a garbage collector without stop-the-world pauses. The result is a language for performant actors, and a set of ideas bigger than the language itselfâŠ
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Pony: https://www.ponylang.io/
The Pony Tutorial: https://tutorial.ponylang.io/
The Pony Playground: https://playground.ponylang.io/
Azul Garbage Collector: https://www.azul.com/products/components/pgc/
Shenandoah Garbage Collector: https://wiki.openjdk.org/display/shenandoah/Main
A String of Ponies (Distributed Actors Paper): https://www.doc.ic.ac.uk/~scb12/publications/s.blessing.pdf
Garbage Collection with Pony-ORCA: https://tutorial.ponylang.io/appendices/garbage-collection.html
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This week we take a look at Bevy, a new game engine written in Rust. And in particular, we look at a core component of Bevy that has something to teach you even if you never write a game: its Entity Component System, or ECS. An ECS is an approach to managing complex systems with large numbers of moving parts, that takes some inspiration from the Relational Database world, and a little from Functional Programming to build something entirely unique and surprisingly high-performance.
Joining us to explain all is Alice Cecile. Sheâs part of the Bevy foundation, which is charting a course from data-management and rendering tool to fully-featured game development environment. A journey theyâve made huge progress on, but still expect to take another decade to come to full fruition. We look at the core ECS, and the wider project-management approaches they need to make the journey.
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Bevy: https://bevyengine.org/
Bevy Examples: https://bevyengine.org/examples/
Flecs (C++): https://github.com/SanderMertens/flecs
Tiny Glade (game): https://store.steampowered.com/app/2198150/Tiny_Glade/
Alice on Mastodon: https://mastodon.gamedev.place/@alice_i_cecile
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Given how many languages have been written in C over the years, itâs not surprising to see new languages being written in Rust. What is surprising about this weekâs guest is the domain heâs writing for: Computer Aided Design (CAD). Could Rust be sneaking its way into the CAD world too?
Joining me to discuss the design and implementation of a CAD programming language is Adam Chalmers. He works at Zoo, developing KCL - a language that looks like JavaScript, runs on Rust, and offers users a seamless hybrid experience of both coding and point-and-click modelling. So, how does that all fit together?
In this episode we look at the design and implementation of a programming language in Rust; how KittyCAD creates that hybrid environment for text-based programming and point-and-click modelling; and how we can learn to write our own Rust-interpreted languages.
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Adamâs Blog: https://adamchalmers.com/
Adamâs Guide To Writing Parsers: https://www.youtube.com/watch?v=QF3kMyzMC40
Zooâs Modelling App: https://zoo.dev/modeling-app
Mechanical CAD: https://zoo.dev/blog/mechanical-cad-yesterday-today-and-tomorrow
A Lego brick in KCL: https://zoo.dev/docs/kcl-samples/lego
Winnow: https://docs.rs/winnow/latest/winnow/
Nom: https://docs.rs/nom/latest/nom/
Factorio: https://www.factorio.com/
Satisfactory: https://store.steampowered.com/app/526870/Satisfactory/
Crafting Interpreters: https://craftinginterpreters.com/
Coding in Antarctica: https://brr.fyi/
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For some kinds of application, there is no faster or cheaper way to build a user interface than in the terminal. Sure, itâs not going to suit every kind of user out there, but for those of us that are happy on the command line, rich Text User Interfaces (or TUIs) open all the exploration and discoverability benefits of a GUI are a fraction of the development time.
This week weâre looking at a Rust TUI library with the excellent name âratatuiâ. Weâre joined by Orhun Parmaksız, one of the lead developers and a huge TUI enthusiast on a quest to see how far Text UIs can be pushed.
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Ratatui: https://ratatui.rs/
Ratatouille Tutorials: https://ratatui.rs/tutorials/
Tui Realm: https://github.com/veeso/tui-realm
Awesome Ratatui: https://github.com/ratatui/awesome-ratatui
RTL SDR: https://www.rtl-sdr.com/about-rtl-sdr/
Rust Snake AI: https://github.com/bones-ai/rust-snake-ai-ratatui
SystemCtl-Tui: https://github.com/rgwood/systemctl-tui
GitU: https://github.com/altsem/gitu
âŠand GitUi: https://github.com/extrawurst/gitui
GitCliff Changelog Tool: https://git-cliff.org/
ATAC (Postman in the Terminal): https://github.com/Julien-cpsn/ATAC
BubbleTea (TUIs in Golang): https://github.com/charmbracelet/bubbletea
Imgcat (images in the terminal): https://github.com/danielgatis/imgcat
TachyonFX: https://github.com/junkdog/tachyonfx
ASCIITheatre: https://ascii.theater/
Rio Terminal: https://raphamorim.io/rio/
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Lustre is a web framework that takes a lot of inspiration from Elm, some from React, and a surprising amount from Erlangâs actor model, to provide a library that blurs the lines between executing on the client, or on the server.
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Lustre: https://hexdocs.pm/lustre/index.html
Gleam: https://gleam.run/
Join the Gleam Community: https://gleam.run/community/
Processing (AV Framework for Java): https://processing.org/
Vue.js: https://vuejs.org/
Svelte: https://svelte.dev/
Elm: https://elm-lang.org/
Elm Table: https://package.elm-lang.org/packages/gribouille/elm-table/5.3.0/
Hayleigh on Twitter: https://x.com/hayleighdotdev
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Iâm always interested in what factors shape the design of a programming language. This week weâre taking a look at a language thatâs wholly shaped by its need to support a very specific kind of program - audio processing. Anything from creating a simple echo sound effect, to building an entire digital instrument based on a 17th-century harpsichord.
The language in question is Faust, and this week weâre joined by Romain Michon, who works on and teaches Faust, as we look at how itâs designed, what kind of programmers it's for, and how it does the job of turning audio-pipeline definitions into executable code.
And one of the surprising parts of that compilation strategy is the decision to have it compile to multiple targets, from the expected ones like C and Rust, to the exotic destination of FPGAs (Field Programmable Gate Arrays). FPGAs are like reprogrammable circuit boards, and Romain dives into Faustâs attempts to go from a high-level description of an audio program, all the way down to instructions that tell a chip exactly how it should wire itself.
So rather aptly for a technology podcast, we start this week with what your ear can hear and go all the way down to logic gates and circuit boardsâŠ
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Try Faust in the Browser: https://faustide.grame.fr/
Faust Online Course: https://www.kadenze.com/courses/real-time-audio-signal-processing-in-faust/info
FPGAs: https://en.wikipedia.org/wiki/Field-programmable_gate_array
VHDL: https://en.wikipedia.org/wiki/VHDL
Verilog: https://en.wikipedia.org/wiki/Verilog
Grame: https://www.grame.fr/
The (Strawberry Jam) Gramophone: https://www.grame.fr/articles/gramophone
Gramophone Workshops: https://www.grame.fr/evenements/atelier-gramophones-65ca16b19fec4
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This week we take a look at what you can do with a GPU when you get away from just using it to draw polygons. AgnĂšs Leroy has spent most of her career programming, optimizing and converting programs to run on that oh-so-curious piece of specialised processing hardware, and we go through all the places that journey has taken her. From simulating the flow of fluids in hydroelectric powerstations, to figuring out how to make a new approach to encryption run fast enough to make it practicalâŠ
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A Fully Homomorphic Encryption Scheme (pdf): https://crypto.stanford.edu/craig/craig-thesis.pdf
CUDA platform: https://developer.nvidia.com/cuda-zone
Rust-CUDA: https://github.com/Rust-GPU/Rust-CUDA
And in case anyone was wondering, A List of Hydroelectric Power Stations in France: https://en.wikipedia.org/wiki/Category:Hydroelectric_power_stations_in_France
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OCaml has one of the best-loved compilers available, and parts of it are surprisingly pluggable, so itâs not surprising that someone would eventually try to wed OCaml with JavaScript and the web browser. In fact, the ecosystem has gone further, and there are now a bevvy of options for people who want to write OCaml and run it in the browser, or want to write OCaml in the browser, or want to write something that looks like JavaScript but runs OCaml on the backend.
Joining me to explore the OCaml-meets-JavaScript world is Antonio Montiero. Heâs a key maintainer/contributor for Melange and ReasonML, as well as several other interesting OCaml web projects.
We kick off by discussing the benefits of OCaml and how it clicked with him personally, before we dive into how and why the compiler is being adapted and tweaked to take it to a whole new audience of web-hungry developers.
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The OCaml Platform: https://ocaml.org/platform
OCaml on Discord: https://discuss.ocaml.org/t/ocaml-discord-server/1884
ReasonML: https://reasonml.github.io/en/
What is Melange? https://melange.re/v4.0.0/what-is-melange.html
Melange for React Devs: https://react-book.melange.re/
The Melange Playground: https://melange.re/v4.0.0/playground/
js_of_ocaml: https://github.com/ocsigen/js_of_ocaml
FUN OCaml Conference: https://fun-ocaml.com/
Kris on Mastodon: http://mastodon.social/@krisajenkins
Kris on LinkedIn: https://www.linkedin.com/in/krisjenkins/
Kris on Twitter: https://twitter.com/krisajenkins
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Mapping is a hugely complex task to take on. Even if you moved as much of the data-management as you can out to 3rd-party services, youâd still have a tonne of work to do weaving together map tiles, routing information, GPS data, points of interest, search and more. And as if that wasnât enough, youâd probably want that software to work on a whole range of platforms, so you have to build something that works on iOS, Android and more. Itâs little wonder that the space is dominated by a few closed-source projects owned by huge companies with near-limitless resources.
But that doesnât mean the problem canât be cracked as an open-source project. This week we look at the open source map library Ferrostar. Joining me to discuss it is the projectâs lead developer, Ian Wagner, as we explore the problem space and dive down into Ferrostarâs architecture: A core Rust library serving a suite of custom UI shells written in Kotlin, Swift, WASM and TypeScript.
Along the way there are tips for anyone attempting to build a map, or wanting to interop Rust with other languages.
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Ferrostar on Github: https://github.com/stadiamaps/ferrostar
Ferrostar user guide: https://stadiamaps.github.io/ferrostar/
MapLibre: https://maplibre.org/
Project OSRM: https://project-osrm.org/
Dioxus (Rust UI framework): https://dioxuslabs.com/
Slint: https://slint.dev/
UniFFI (repo): https://github.com/mozilla/uniffi-rs
UniFFI (user guide): https://mozilla.github.io/uniffi-rs/latest/
Beeline (navigation device): https://beeline.co/
Ian on Mastodon: https://fosstodon.org/@ianthetechie
Ian on Twitter: https://x.com/ianthetechie
Kris on Mastodon: http://mastodon.social/@krisajenkins
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The terminal might be the most used development tool in history. So itâs a little odd that it hasnât changed that much in the decades since the terminal first came into being. Is the terminal a âcompletedâ project? Or are there new ways to look at it that might make it even more useful?
This weekâs guestâZach Lloydâis convinced the terminal is ripe for a new approach thatâs more than just a new coat of paint. And in this episode we dive into what that approach is, what heâs trying to do with the Warp Terminal, and how itâs put together using a combination of Rust and GPU shaders.
Along the way we look at what LLMs could do to improve the terminal experience, where the boundary lies between terminal and shell, and where Go has solved some problems and created others over at Warp HQ.
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Warp Homepage: https://app.warp.dev/referral/VQGWW3
VT100 Information: https://vt100.net/
Game of Life in Rust: https://github.com/krisajenkins/game-of-life-rust
Zed (Text editor in Rust): https://zed.dev/
Flutter: https://flutter.dev/
The Painterâs Algorithm: https://en.wikipedia.org/wiki/Painter%27s_algorithm
Zach on LinkedIn: https://www.linkedin.com/in/zachlloyd/
Kris on Mastodon: http://mastodon.social/@krisajenkins
Kris on LinkedIn: https://www.linkedin.com/in/krisjenkins/
Kris on Twitter: https://twitter.com/krisajenkins
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0:00 Intro
2:22 Why Create A New Terminal?
7:28 Blurring the Lines Between Terminal and Shell
16:04 How Do You Build A Terminal Program?
24:55 Implementing a Terminal in Rust
30:32 Rust Frameworks for GPU Shaders
40:04 Will Any Of This Go Open Source?
42:49 Managing a Mixture of Rust and Go
47:52 Whatâs the DX of Warp?
51:43 Integrating LLMs into the Terminal
1:05:58 Outro
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A languageâs ASTâitâs abstract syntax treeâis nearly always a hidden implementation detail. Itâs not treated as part of the language, but merely the intermediate step between parsing and compiling. But this weekâs guest aims to flip that relationship on its head...
Peter Saxton joins me to talk about EYG - an AST-first language that defines the fundamental capabilities first, and then stretches out from there to surface syntax and final execution.
The result is something that can teach us a lot about how a typed, functional programming language works; how an extensible effects system works; and could make writing a new programming language as easy as defining the syntax you want, and parsing that into EYG's AST.
--EYG Homepage: https://github.com/crowdhailer/eyg-lang
TinyGo: https://tinygo.org/
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DuckDBâs become a favourite data-handling tool of mine, simply because it does so many small things well. It can read and write a huge number of data formats; it can infer schemas automatically when you just want to move quickly; and it can interface with most languages, run like lightning on the desktop or be embedded into a webpage. Iâm a huge fan.
But Iâm not nearly as knowledgeable as this weekâs two fans, Simon Aubury and Ned Letcher, whoâve just written a book on all the many ways you can use DuckDB and all the hidden tricks and tips that help you make the most of this. So in this episode weâre taking a practical look at DuckDB, what problems it can solve at work, and how to start getting the most out of it.
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Getting Started with DuckDB (book): https://packt.link/byKYt
DuckDB episode with Hannes MĂŒhleisen: https://youtu.be/pZV9FvdKmLc
DuckDB: https://duckdb.org/
dplyr, the data-manipulation language: https://dplyr.tidyverse.org/
duckplyr, DuckDBâs ânativeâ version: https://github.com/duckdblabs/duckplyr
Substrait: https://substrait.io/
Observable (Markdown+DuckDB=Reports): https://observablehq.com/framework/
DuckDBâs âfriendlyâ SQL: https://duckdb.org/docs/sql/dialect/friendly_sql.html
Community Extensions: https://community-extensions.duckdb.org/
DuckCon #5: https://duckdb.org/2024/08/15/duckcon5.html
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RRWeb is based on a simple idea: If you capture all the DOM events in a browser session, and when they happened, you could play it back later. Play it back for diagnosing error conditions, for understanding your userâs journey, or for creating demo videos that can be edited element-by-element instead of frame-by-frame.
Unfortunately, the simple idea gets tricky when you try to implement, for a whole host of browser specific glitches, differences, and places where the HTML5 spec ran out. Itâs exactly the kind of project where might want to use it, but you want someone else to maintain it!
Joining us this week is Justin Halsallâa chief contributor to rrwebâto teach us about some of the more barren corners of the browser spec, how heâs fought through them, and what the benefits are on the other sideâŠ
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RRWeb homepage: https://www.rrweb.io/
RRWeb on Github: https://github.com/rrweb-io/rrweb
RecordOnce: https://recordonce.com/
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0:00 Intro
3:10 What is rrweb Doing?
6:12 Beginning With A Naive Implementation
9:49 Supporting Canvas Tags
13:05 Exotic HTML 5 Tags Like Midi
14:31 The Internal Data Format
17:39 How Reliable Can This Be In Practice?
23:04 Cross-Browser Support
24:32 Exploring The Use Cases
30:17 Privacy Issues
33:46 Analyzing User Interactions En-Masse
36:40 Is The Spec Greater Than The Tool?
38:20 The Practical Benefits Of Contributing To Open Source
44:45 Updating Recordings After The Website Changes
49:55 Playing Well (Or Badly) With Popular Frameworks
53:21 The Runtime Burden
54:17 What's Coming In The Future?
1:01:02 Outro
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The ZigLang team have put an astonishing amount of effort into making Zig work an effective tool for compiling C across different architectures. Work that benefits the Zig language, but also has a chance to benefit languages like Python and Rust. Or indeed, any language that uses native C libraries somewhere in its stack.
So this week weâre joined by Loris Cro of the Zig team to dive into how you make a reliable, cross-platform toolchain that can compile C anywhere it finds it. And in doing so,
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Zig Homepage: https://ziglang.org/
Zig on Github: https://github.com/ziglang/zig
MingW for Windows: https://www.mingw-w64.org/
All Your Codebase: https://allyourcodebase.com/
Ziglang on PyPi: https://pypi.org/project/ziglang/
Shout out to Whitequark: https://pypi.org/user/whitequark/
Darling: https://www.darlinghq.org/
WineHQ: https://www.winehq.org/
PyPi Stats: https://pypistats.org/packages/__all__
The Zine static site generator: https://zine-ssg.io/
The Zine source code: https://github.com/kristoff-it/zine
Lorisâ website: https://kristoff.it/
Kris on Mastodon: http://mastodon.social/@krisajenkins
Kris on LinkedIn: https://www.linkedin.com/in/krisjenkins/
Kris on Twitter: https://twitter.com/krisajenkins
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Back in 2012, JosĂ© Valim started building Elixir to as a way to have his ideal programming language running on the same platform as Erlang. Fast-forward 12 years and itâs become build anything from distributed infrastructure to notebooks and websites.
In this weekâs Developer Voices, JosĂ© joins us to tell the history of Elixir in a series of design choices. Which features mattered to him in the early days, and which ones excite him most now. Whatâs going on under the hood to make Elixir tick, and what does its future hold?
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Elixir Homepage: https://elixir-lang.org/
Elixir Docs: https://elixir-lang.org/docs.html
Numerical Elixir: https://github.com/elixir-nx
Phoenix: https://phoenixframework.org/
Livebook: https://livebook.dev/
JosĂ©âs Livebook & Elixir Presentation: https://www.youtube.com/watch?v=pas9WdWIBHs
Comparing Elixir & Erlang Variables: https://dashbit.co/blog/comparing-elixir-and-erlang-variables
Gleam on the BEAM: https://youtu.be/RntfkL8lUY4
José on Github: https://github.com/josevalim
Kris on Mastodon: http://mastodon.social/@krisajenkins
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Thereâs huge pressure on Python at the moment to get faster, ideally without changing at all. One increasinglyâpopular way of achieving that impossible task is to push the performance critical code down into C, C++, or Rust. And this week weâre focussing on the Python route, as we take a look at PyO3.
David Hewittâs the principal committer to PyO3, and he joins us to go through the easy parts, the hard parts, and the works in progress, giving us an insight into how Python and Rust work under the hood, and quite how much work it takes to make them work as one.
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PyO3 User Guide: https://pyo3.rs/v0.22.0/
PyO3 on Github: https://github.com/PyO3/pyo3
Polars: https://pola.rs/
Tokio: https://tokio.rs/
Trio: https://trio.readthedocs.io/
Robyn: https://github.com/sparckles/Robyn
Faster CPython: https://github.com/faster-cpython
Maturin: https://www.maturin.rs/
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David on Mastodon: https://fosstodon.org/@davidhewitt
David on Twitter: https://x.com/davidhewittdev
Kris on Mastodon: http://mastodon.social/@krisajenkins
Kris on LinkedIn: https://www.linkedin.com/in/krisjenkins/
Kris on Twitter: https://x.com/krisajenkins
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Most message systems have an opinion on the right way to do inter-systems communication. Whether itâs actors, queues, message logs or just plain olâ request response, nearly every tool has decided on The Right Way to do messaging, and it optimises heavily for that specific approach. But NATS is absolutely running against that trend.
In this weekâs episode, Jeremey Saenz joins us to talk about NATS, the Cloud Native Computing Foundationâs configurable message-passing and data-transfer system. The promise is a tool that can happily behave like a queue for one channel, a log like another and a request/response protocol for the third, all with a few client flags.
But how does that work? Whatâs it doing under the hood, what features does it offer, and what do we lose in return for that flexibility? Jeremy has all the answers as we ask, what is NATS really?
â
NATS on Github: https://github.com/nats-io/nats-server
NATS Homepage: https://nats.io/
Getting Started with NATS: https://youtu.be/hjXIUPZ7ArM
Developer Voices Episode on Benthos: https://youtu.be/labzg-YfYKw
CNCF: https://www.cncf.io/
The Ballerina Language: https://ballerina.io/
Kris on Mastodon: http://mastodon.social/@krisajenkins
Kris on LinkedIn: https://www.linkedin.com/in/krisjenkins/
Kris on Twitter: https://twitter.com/krisajenkins
Support Developer Voices via Patreon: https://patreon.com/DeveloperVoices
Support Developer Voices via YouTube: https://www.youtube.com/@developervoices/join
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Smalltalk is one of those programming languages thatâs lived out of the mainstream, but often referenced as an influence and an important part of programming history. Itâs the cornerstone of object-oriented programming, it was into message passing before actors were cool, and it blurs the line between operating system, programming language and personal notebook. But what is it?
Joining us to discuss it is Juan Vuletich, the creator of one of Smalltalkâs latest incarnations, Cuis. In this episode we cover Smalltalkâs history, its design ideas, Cuisâs unique implementation and what makes this modern implementation something special.Smalltalk is over 50 years old, but its vision of how computing could work has only begun. Letâs see if we can mine some ideas from it to take us into the next generation of computing...
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The Cuis Smalltalk Book: https://cuis-Smalltalk.github.io/TheCuisBook/Preface.htmlCuis on Github: https://github.com/Cuis-Smalltalk/Cuis-Smalltalk-Dev
The Cuis Community: https://cuis.st/community
A Short History of Cuis: https://github.com/Cuis-Smalltalk/Cuis-Smalltalk-Dev/blob/master/Documentation/CuisHistory.md
Monticello VCS: https://wiki.squeak.org/squeak/1287
Juanâs Music Research: https://www.jvuletich.org/research.html
Back to the Future - The Story of Squeak (pdf): https://dl.acm.org/doi/pdf/10.1145/263700.263754
Kris on Mastodon: http://mastodon.social/@krisajenkins
Kris on LinkedIn: https://www.linkedin.com/in/krisjenkins/
Kris on Twitter: https://twitter.com/krisajenkins
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