David Bernheisel

@david

erlef.org Board Member | Working at tv-labs | bernheisel.com | Founder of zest.dev (consultancy) #ElixirLang

170 Following1,190 Followers287 Posts

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David Bernheisel@david· 26d

Added crt-lotte filter client side for beamicom_phx so it looks authentic

David Bernheisel@david· 27d

Check this out, this png is a save file. I don't know if bsky will re-encode it and lose the info, but around the border is encoded dots with the save state of the game. Load that in beamicom and pick up where you left off.

David Bernheisel@david· 28d

and now a WebRTC web client with AV1 encoding/relaying (with Membrane). Haven't deployed it yet, so not really "working" yet, but plays great locally right now. github.com/dbernheisel/...

David Bernheisel@david· 28d

gameplay (couldn't capture audio, but it's there)

David Bernheisel@david· 28d

oh hey, I wrote an NES emulator in Elixir 60fps (on my machine) with sound. This is Castlevania 3 which might be the toughest one to emulate. github.com/dbernheisel/... #ElixirLang

Castlevania 3 running in an Elixir-native NES emulator

David Bernheisel@david· Jun 5

Removed Dialyzer. Thank you Elixir 1.20.0 #ElixirLang

chore(ci): remove dialyzer
Merged by dbernheisel
merged 7 commits into main

David Bernheisel@david· Apr 17

David Bernheisel@david· Apr 15

I always do this: `mix <tab> <tab> <rage tab>` and then realize completions aren't built in for mix. so I hacked together something truly awful, but it works github.com/dbernheisel/... Add this ^ to your zsh fpath and then you have more helpful completions, including flags. #ElixirLang

mix deps.unlock --unused
-- switch --
--all -- unlocks all dependencies
--check-unused -- checks that the `mix.lock` file has no unused dependencies. This is useful in pre-commit hooks and CI sc
--filter -- unlocks only deps matching the given name
--unused -- unlocks only unused dependencies (no longer mentioned in the `mix.exs` file)

David Bernheisel@david· Apr 15

I added a markdown pre-processor just for `nofile` markdown buffers. Renders with markview.nvim but pre-processed to reflow paragraphs, adjust spacing, and process md extensions. This shows a rendered info admonition block. 4-indented code in exdoc is assumed to be Elixir.

David Bernheisel@david· Apr 13

We have another one coming up called Runcom, which will be an infrastructure orchestration commander/dashboard. Imagine Ansible, but compiled, distributed, and commanded from your admin webapp. A little sneak peak for now

$|> Debug.add("start", message: &"Kitchen sink #{&1.assigns.run_id} starting" ) |> RCFile.add("setup_dir", path: & &1.assigns.work_dir, state: :directory ) |> Runcom.graft("probe", RuncomDemo.Runbooks.AgentProbe.build(%{}), await: ["setup_dir"] ) |> RCBash.add("sysinfo", script: ~BASH"uname -a", await: ["setup_dir"] ) |> RCBash.add("disk", script: ~BASH"df -h / | tail -1", await: ["setup_dir"] )$

David Bernheisel@david· Apr 13

I was able to wire up Popcorn to run Elixir and PGlite to run Postgres, both in the browser. This means we can have an interactive and safe sandbox for arbitrary code. Which means a really good experience learning Ecto on a website. I'll publish it soon :) #ElixirLang

David Bernheisel@david· Feb 28

I build a Neovim blink.cmp source for Hex.pm. Now you can search hex packages from your mix.exs file, and autocomplete versions. github.com/dbernheisel/...

David Bernheisel@david· Dec 8

Published a little LiveDashboard page for managing some data migrations. hex.pm/packages/dat... #ElixirLang

Example of LiveDashboard page with logs being streamed

David Bernheisel@david· Aug 15

quick tip for #ElixirLang and HEEX HTML string attributes. Eg, when you need conditional css classes, use lists. LiveView will see it as an iolist. It lends itself to better formatting when it gets long, and you can logically group them. You don't need to interpolate a long string.

Much easier to read:

class={[
# GOOD
"block w-full rounded-md py-1.5 shadow-xs text-sm leading-6",
"border-0 text-gray-900 ring-1 ring-inset ring-gray-300",
"placeholder:text-gray-400 disabled:bg-slate-50 focus:ring-zinc-400",
@errors != [] && "ring-rose-400 focus:ring-rose-400",
@class
]}

Bad. See how hard this is to read?

class={"block w-full rounded-md py-1.5 shadow-xs text-sm leading-6 border-0 text-gray-900 ring-1 ring-inset ring-gray-300 placeholder:text-gray-400 disabled:bg-slate-50 focus:ring-zinc-400 #{@errors != [] && "ring-rose-400 focus:ring-rose-400"} #{@class}"}

David Bernheisel@david· Feb 17

CSS `attr` now supports a type! this eliminates ugly hacks: - interpolating inline styling - tailwind helper functions avoiding interpolating part of a class name (though v4 resolve) - handling in JS developer.mozilla.org/en-US/docs/W... developer.chrome.com/blog/advance...

HTML

<div data-rotation="-3">I am
rotated
by -3 degrees</div>
<div data-rotation="2">And I by 2
degrees</div>
<div>And so am I, using the fallback value of 1.5deg</div>

CSS

div {
width: fit-content;
transform-origin: 50% 50%;
rotate: attr(data-rotation deg, 1.5deg);
}

David Bernheisel@david· Feb 16

Just want to know the opportunities! But yeah stateside is looking grim. Moving elsewhere in the country is also an option. Evidently we are "assessing the threats" of ADHD meds and SSRIs among others, which may code for "banning soon." www.whitehouse.gov/presidential...

THE WHITE HOUSE
Sec. 5. Initial Assessment and Strategy from the Make America Healthy Again Commission. (a) Make our Children Healthy Again Assessment. Within 100 days of the date of this order, the Commission shall submit to the President, through the Chair and the Executive Director, the Make Our Children Healthy Again Assessment, which shall:
(i) identify and describe childhood chronic disease in America compared to other countries;
(ii) assess the threat that potential over-utilization of medication, certain food ingredients, certain chemicals, and certain other exposures pose to children with respect to chronic inflammation or other established mechanisms of disease, using rigorous and transparent data, including international comparisons;
(ill) assess the prevalence of and threat posed by the prescription of selective serotonin reuptake inhibitors, antipsychotics, mood stabilizers, stimulants, and weight-loss drugs;|

David Bernheisel@david· Feb 7

Holy smokes this is awesome, a new debugger for Phoenix LiveView. Think React devtools, but not a chrome extension. github.com/software-man... #ElixirLang

David Bernheisel@david· Jan 16

It also has some simplified igniter-powered installation scripts. It's super simple now to add Oban to your existing project or start a new Phoenix project with Oban included. Lastly, a lot of improvements in the UI, telemetry, simplification of how to mount the dashboard hexdocs.pm/igniter/read...

$mix archive.install hex igniter_new mix igniter.new oban_demo \ --with phx.new \ --with-args="--database postgres" \ --install oban$

David Bernheisel@david· Jan 14

@nezteb.net the Elixir feed doesn't seem to be working. Is the provider of it down? iirc it was skyfeed, right?

Status page of skyfees indicating all the things are down

David Bernheisel@david· Jan 10

AWESOME! Coming in ex_doc soon is a new button to go to the latest version's documentation if you happen to be on an earlier version. I often find myself googling something, getting a hexdocs.pm link but for some inexplicable reason it puts me into an old version of it github.com/elixir-lang/...

screenshot of hexdocs for req that contains a link to go to the latest version of the documentation.

David Bernheisel@david· Dec 28

Elixir 1.19 lands some new type checking, this time with protocols! If you implement a pattern-match inside of a protocol implementation that isn't possible, the compiler will now warn! It was also warn if you implement for an unknown (eg, misspelled) module. #ElixirLang

defprotocol UnknownImplFor do
def foo(data)
end

defimpl UnknownImplFor,
for: [
Map,
# Unknown # <-- This is the problem
] do
def foo(data), do: data
end

# Compiling 1 file (.ex)
# warning: you are implementing a protocol for Unknown
# but said module is not available. Make sure the module
# name is correct. If Unknown is an optional dependency,
# please wrap the protocol implementation in a
# Code.ensure_loaded?(Unknown) check
# │
# 5 │ defimpl UnknownImplFor,
# │ ~~~~~~~~~~~~~~~~~~~~~~~
# │
# └─ lib/protocol_types.ex:5: (file)

$defprotocol IncorrectImpl do def foo(data) end defimpl IncorrectImpl, for: [Map, Range, Bitstring] do def foo(nil), do: nil # <--- This is the problem def foo(map), do: map end # Compiling 2 files (.ex) # warning: the 1st pattern in clause will never match: # # nil # # because it is expected to receive type: # # dynamic(%Range{first: term(), last: term(), step: term()}) # # typing violation found at: # │ # 6 │ def foo(nil), do: nil # │ ~~~~~~~~~~~~~~~~~~~~~ # │ # └─ lib/incorrect_dispatch.ex:6: IncorrectDispatch.Range.foo/1$

David Bernheisel@david· Nov 26

Set him up for success with stories about "this is how you remind me of what I am really am" and how you "never made it as a wise man" then tell him to look at this photograph

Dave's favorite band Nickelback singer holding a photo of Dave

David Bernheisel@david· Nov 15

#CodeBEAM #ElixirLang Carlo sharing how to break down problems, organize the chaos, and visualize the interacting components

Carlo Gilmar on stage with a slide of visual thinking practices

David Bernheisel@david· Nov 15

#ElixirLang #CodeBEAM Sergey is showing how to leverage mix for erlang projects

A comparison of erlang rebar config and its equivalent mix config.

David Bernheisel@david· Nov 15

#ElixirLang #CodeBEAM awesome presentation on telemetry with Live View Dead Views, async OTP tasks, linked async jobs, and frontend (oh my)

Slide asking Can we combine or link traces for dead render and live render? Answer: yes.

David Bernheisel@david· Nov 15

Turns out SonicPI is fundamentally sound in theory as well as literally sound.

David Bernheisel@david· Nov 15

#ElixirLang #CodeBEAM @samaaron.bsky.social is introducing his new thing Tau5. Education through music. Incredibly engaging.

Sam Aaron on stage with a slideshow behind him providing background on his software Sonic PI

David Bernheisel@david· Nov 15

I have arrived! Great friends! Cannot wait for all the awesome talks and convos #ElixirLang