Dave Thomas
@pragdave
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Programmer turned publisher (but mostly programmer)
Dallas, Texas
Joined May 2007
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Dear programming tool developers:
JSON is a program-to-program data transfer mechanism.
If you make users of your tool configure it using JSON files, it means you're placing your convenience over theirs.
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If you haven't seen it, here's the announcement:
The Pragmatic Programmer, 20th Anniversary Edition, real soon now.
A whole bunch of new content, a whole bunch of revised content, but no change to the common sense.
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What's wrong with JSON for configuration?
1. no ability to comment things out
2. no trailing commas make maintaining lists more cumbersome
3. quotes around keys are just silly
4. no ability to inherit defaults
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Time to recognize the inevitable. The work "agile" is now dead—let's move on.
http://t.co/GWdtRtpaNO
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Switched from using the fancy JavaScript build tools back to using a simple Makefile. Not only is it now reliable, but I can actually reason about what it is doing, and adding one new resource format doesn't incur a day's worth of dependency negotiation.
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So, programmer pals.
It seems like a lot of developers are great programmers, but at the same time are a bit shaky when it comes to some of fundamentals: stuff down at the machine and operating system level.
If I did a course covering that stuff, would there be interest?
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Some folks talk about ending the day with a clean checkin.
I'm increasingly finding it better to end with a failing test; it helps we regain context the next morning.
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I've been wanting to write a little about how practices from 50 years ago are influencing developers today. As an experiment, I'm starting a series over on Medium:
Please let me know what you think.
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I'm so glad we could do this. The ebook of Programming Elixir ≥ 1.6 (yes, the latest version) is now free to students and teachers.
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Programmer? Want to learn Elixir?
I’m creating a new online Elixir course, and I’m looking for a few beta testers:
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I'm starting to explore Elixir's
@AshFramework
(). It's a seriously impressive piece of work and looks like a well-thought out way of both modeling and exposing your domain. I'm going to spend a few days trying to model a subset of the PragProg backend;
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I've finally had the courage to release my Elixir "Component" library, designed to encourage the building of deliverables using decoupled, coherent, components.
•
•
@elixirlang
#myelixirstatus
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If you got a previous edition of Programming Elixir from , watch your inbox later on today.
Happy New Year...
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Reading patterns books is like watching drug ads on TV. By the end, you're convinced you have all the symptoms and need all the remedies.
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My
@empexco
talk about rethinking the way we write Elixir is up. It's no more than a set of initial thoughts, but I really think there's something to them.
I was just coming off a case of pneumonia, so sorry about the sniffs.
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An Elixir JSON API server in 2 tweets (ignoring application.ex). Once it gets warmed up, it is insanely fast:
21:35:37.321 [info] GET /login/33
21:35:37.321 [info] Sent 200 in 28µs
#myelixirstatus
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After a seven year break, I'm back running the Pragmatic Bookshelf. I have a lot of cool things planned, but I could really do with your help. For the background, and for details on how to voice your opinions, see . I look forward to chatting with a whole
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If you want to comment a public function, but hide it from the documentation system, try the following. (The trick is the "!" operator.)
#myelixirstatus
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The "Death of Agile" talk I gave to
@ThoughtWorks
#rethink
has been posted:
http://t.co/YNuGohXxGn
FWIW, I think it's one of my better ones
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Sometimes using Dialyzer is like talking to an ancient Buddhist monk. You get suggestions, but it takes a lifetime of exploring to work out what they mean, and in the end you knew the answer all along.
#myelixirstatus
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Programmer? Want to learn Elixir? My new course is available. 80% complete/30% discount for a week. Includes rants 😤
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Teaching some git to my class today, and noticed this on a student's laptop.
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New post: decoupling Elixir apis, implementations, and servers.
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After several aborted attempts over the last 18 months, I've finally moved my development environment off my Macs and back to Linux. Only real pain point is the horrible mish mash of control/super/alt between different apps. Small price to paygiven the hardware options available.
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Emailing by students notes on their grades. Programming by pipeline. Transformative!
#myelixirstatus
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til: (copy/paste into chrome web developer console)
var msg = new SpeechSynthesisUtterance();
var voices = window.speechSynthesis.getVoices();
msg.voice = voices[50];
msg.voiceURI = 'native';
msg.text = 'Gosh! I do believe my browser can talk';
speechSynthesis.speak(msg);
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First (and tentative) prerelease of Bunyan, a distributed and extendable logger for Elixir.
I built it both because I needed it and because I wanted to try out my ideas on structuring Elixir apps on a real-world example.
#myelixirstatus
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At first glance my arguments against project directory structure seem like bikeshedding. They are, to some extent. But I think the way we structure our project tree is a symptom of a real problem. I tried to describe it in an article:
#myelixirstatus
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Really, really cool announcement coming out tomorrow of something that's been cooking for a long time.
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I'd cover things ranging from number representation to how page tables work to operating systems and I/O, compilers, linkers, loaders, networking, and other stuff that people request. It would all be backed by code and projects.
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Psst. Wanna know something before it's announced???
The Pragmatic Programmer is now available as an audiobook.
And on iTunes (if not now, then very soon)
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It's my birthday, and I feel like spreading the joy.
Use code "cake" at checkout to get 50% off at . Good for 24 hours, or until the grownups find out and stop me...
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I've used OS X for years and never realized how useful 'say' is:
rake build; say build done
Means I can go do something else, and not poll
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If dogs have an afterlife, I hope it’s full of slow squirrels and long grass.
Have fun, Moose.
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The way
@AshFramework
handles migrations is spot on. No need to define separate schema and data models. Instead, just model your data, and when you need to reflect those changes in a database schema, just ask Ash to generate the migration and run it. It effectively does a
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Picked up an old Dell R710 and installed Fedora. 24 cores, 32GB ram, and 2TB on a Raid controller. <$300.
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The challenge of functional programming is making the right data available where you need it.
The challenge of object-oriented programming is that this isn't a challenge.
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@FrancescoC
@joeerl
You never walked up to Joe if you had anything important to do in the next hour, because he always had projects, and they were always interesting, and he was just so damn enthusiastic talking about them. If some people are bright sparks, he was an arc light. (He fizzed, too :)
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Elixir for Programmers comes out of β July 4.
Now $40, then $60.
Sorry to be commercial, but folks want to know.
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Having tried it for a few weeks, I've now switched to doing most of my vector stuff on Affinity Designer by
@AffinitybySerif
. Currently $25 single payment; Illustrator is $21/month. It's also nicer to use. Maybe I'll be able to stop paying the
@adobe
tax.
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I put together a 12 minute video showing some aspects of the
@elixirlang
Component library:
#myelixirstatus
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If you bought the Programming Elixir eBook from us, you now have a coupon in your account for a free 1.2 upgrade.
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98% of my recent web traffic is about agility, so Google puts this ad on every page.
Read it carefully and weep.
http://t.co/Zb2tsBRmSZ
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This post from
@josevalim
is both incredibly well written and very exciting
Once again, he demonstrates how a project owner can respect the projects customers while still making significant and exciting changes.
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TSA fails to detect 95% of threats. This isn't a reason to strengthen them. Instead it proves they aren't needed-nothing happened regardless
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Updating "Programming Elixir" for Elixir 1.2. Ebook owners will get the new version for free (as it's the same edition of the book)
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The Unison language () has some really interesting ideas, from content-addressable immutable code to dependency-injection with abilities, a powerful yet simple alternative to monads. I've written a couple of articles:
Enjoy
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I'm a little upset about the state of programmer interviews...
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Fish shell function to display module and function help from the cmd line:
function re --description 'Get help on an Elixir module or function'
iex -e "require IEx.Helpers; IEx.Helpers.h($argv); :erlang.halt" | cat
end
In use:
$ re String
$ re String.upcase
#myelixirstatus
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I’ve used Emacs for maybe 25–30 years—it has effectively become my window manager.
For my next course, I’m thinking seriously about switching to Visual Studio Code plus tmux in the internal console.
No particular reason apart from a desire to shake me out of a comfort zone.
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I'm liking what I'm reading in
@redrapids
and
@JEG2
's "Designing Elixir Systems". It's a pragmatic approach which (correctly) prioritizes what _you_ need to do over what the frameworks do.
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Fira Code uses ligatures to convert coding digraphs to nice looking wide chars. In the image |> becomes ▷ and -> is →. I’ll give it a week.
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Phoenix is so fast that when I switched in Foundation for Bootstrap and reloaded, I had to inspect the styles to make sure it had happened.
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This article is important reading for anyone who wants to explain something:
(it's not about monads: it's really about Dreyfus and why experts can make no sense)
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After 7 months using Linux, I finally had to power up my MacBook today: I couldn't find anything on Linux to match Keynote when it can to creating animated diagrams.
Surprised how clunky OSX feels compared to Ubuntu.
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A quick note to myself on running Elixir tests on a keystroke in Visual Studio Code:
#myelixirstatus
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The Feynman lectures on the character of physical laws. I watched one a night and was spellbound. Highly recommended.
http://t.co/p9ZNr4Ij
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I’ve been playing with a system for creating new Elixir projects:
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Just noticed that vscode-elixir-ls not suggests specs for public functions that don't currently have them, based on Diayzer's inferred success typing. This is very, very cool, and has already found a mistake I made. A massive tip o' the hat to
@JakeBeckerCode
.
#myelixirstatus
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" If you have three pet dogs, give them names. If you have 10,000 head of cattle, don't bother. Nowadays the idea of giving a name to every file on your computer is ridiculous."
David Gelernter in 1999.
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I assigned my students the task of implementing a state machine in the language of their choice.
I'm currently grading an answer written in Prolog.
Mission accomplished :)
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Simple proof-of-work in Elixir:
def _count(value, counter, difficulty) do
case value do
<< 0::size(difficulty), _::bitstring >> ->
counter
_ ->
_count(:crypto.hash(:sha256, value), counter+1, difficulty)
end
end
does 1.5MM iterations/s on my 2013 mac!
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If mix, Elixir, or Erlang gives you an error about SSL in OS X High Sierra, upgrade your Erlang.
#myelixirstatus
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Just started authoring the next course. Working title: More Advanced Elixir. It has a Russian Doll structure—an interesting challenge
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One of the joys of owning a tractor is the whole new world of warning signs.
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certbot is an amazing tool. The first time I installed an SSL cert, it took 2 days. Now it took 5 minutes (including certificate generation)
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I'm really, really enjoying the Unison language and environment. The append-only library system is fabulous, but takes getting used to. The language itself is sweet, but the icing on the cake is the fantastic _abilities_ feature (Abstract Algebraic Effects).
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Finally, after all these years, I have a desk that looks like a programmer's desk on TV (except the fonts should all be 96pt)
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Just had some PRs accepted for
@BoydMulterer
's wonderful project (I added the ability to specify scenes declaratively). This was easy to do as the
@ScenicFramework
code is wonderfully well organized and tested.
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He loved life. He loved knowledge. He loved sharing both. Even if you didn't know Jim Weirich, you're worse off today.
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I love the way the eliminating duplication provides incremental design insights.
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This man is the Bob Ross of wood. Watch everything he does, and feel the world's cares slip from your shoulders.
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my talk at the Lonestar Elixir conference (remember conferences? Those were the days) is out. Not an Elixir talk. More a "make your life deliberate" talk.
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Thanks for saying this, Ward. I have boycotted them from day one. The entire idea of an "organization to represent 'agile' (the noun)" is oxymoronic.
I'm outraged that the Agile Alliance Board of Directors would claim to be the "keepers of the Agile Manifesto". As an industry association they serve only their members. Their recent mailing might have some good words about equity but they don't know their own history.
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New (short) screencast about making pipelines more functional with anonymous functions.
#myelixirstatus
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1995: I was writing
"",${$href}{$_},…
2015: I just wrote
$(() => { $(".x").hide() });
We've come such a long way in such a short time
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Plugged my cheap raspberry pi touchscreen into my MacBook. Not only did it just work; the touchscreen controls the cursor...
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This is how functions _should_ be written:
Midnight takes your heart and your soul
While your heart is higher than your soul
Take your soul from your heart
Give back your heart
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I wanted to play with generators and streams, so I wrote a property-based testing library for Elixir.
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In programing, when you're 90% complete, you still have 90% of the work ahead. In devops, when you're 90% complete you haven't even started.
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