Elixir Blog Posts

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Hi all.

I have started a new project and decided to document my travels on medium.com.

I have usually shyed away from publishing my Elixir work, but figure I would break that habit.

Please note: This is not a finished project, but I intend to use medium.com as more of a journal of my progress and my learnings about one of my favourite video games as a kid.

https://medium.com/@natewallis/cec23a8bd258

All the best..
Nathan

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782

I love both Elixir and Monkey Island. I started working on something similar for another game, but then came lifeā€¦ So Iā€™m keeping my fingers crossed and Iā€™m sure youā€™ll enjoy the ride!

783

Coolā€¦ thanksā€¦ which game were you looking at?

I donā€™t have a heap of time to dedicate to itā€¦ lets see what happens.

784

I was playing around with rewriting Diablo 1 in Elixir. Had some good progress on that. The dopamine hits that I had while doing it were pretty intense. Unfortunately I kind of got sidelined by trying to build bindings to SDL2. I would come back to this in spare time, but maybe itā€™s better to build bindings to something more powerful like the Godot engine.

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785

We followed up our post on logging with a review of the best Elixir log management tools to give you insight into your production system logs.

https://staknine.com/best-log-management-tools-elixir-phoenix/?utm_source=elixirforum.com&utm_medium=referral&utm_campaign=launch

786

I see that @staknine published a little about logging, so I finally managed to catch up with my ā€œtodoā€ list of blogposts and I have published detailed insights into current Logger implementation with all the stuff that come up after Elixir 1.11 and merging with Erlangā€™s logger.

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787

Uploading files with Phoenix and Javascript? Stephanie Vizzi has created a step-by-step reference to guide you through the process: Phoenix File Uploading via JavaScript

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788

I wrote instructions to get up and running with Stripe Checkout in a Phoenix LiveView app, hope it helps someone!!

https://www.stibbard.io/learning/elixir-phoenix-stripe-checkout

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789

First blogpost about using systemd with Elixir applications

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790

I wrote a blog post on how I used NextJS on Vercel to set up landing pages and blog for a Phoenix LiveView app hosted on Fly. https://aswinmohan.me/posts/superfast-vercel-liveview-fly/

Feedbacks and Suggestions are welcome :smiley:

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791

Is there a particular reason you didnt just have your CI build the static app but still serve it with liveview? Nothing wrong with vercel but it feels a bit overkill just to Ā«not pollute the main repoĀ», when you can just have the static part in a separate repo anyways, or separate folder in monorepo :slight_smile:

792

That is also possible and I would have chosen it if I wasnā€™t working with NextJS. Vercel takes care of a lot of things from deploying close to people, getting a preview URL on every commit, image optimization, cache busting and DDOS mitigation. It handles everything related to the static site which otherwise I would have to maintain by myself.

In the future, once we hit a large amount of volume we might move to the setup you suggested as it is more economical at scale to serve everything from our own infra.

793

Yeah I wouldnt have asked if it wasnt for you already being on distributed infra (fly) with phoenix :slight_smile:

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794

Iā€™ve been wanting to learn more about Elixir macros, so I wrote a blog post where I looked at the source code for if/2 and tried to figure out how it works:

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795

If you use Next.js as the reverse proxy to phoenix, does it mean that the static assets of the phoenix server would have to go through the reverse proxy?

If you make the vercel and flyio hosts use completely separate domain name, ie: mydomain.com for vercel, and app.mydomain.com and use full url for all the cross links, then the reverse proxy should not be necessary and everything should be a little faster, right?

796

Yes, static assets also get proxied through Vercel. But the speed difference is negligible.

That is the recommended way for splitting Static and Dynamic apps, but IndiePaper is a platform. Authors should be able to share their books URL as indiepaper.me/books/awesome-book-id rather than app.indiepaper.me/book/awesome-book. If I was building a simple SAAS, where the app is private and with no shareable links I would have gone with that.

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797

Nicely written post :smile:

Re: the purpose of optimize_boolean, to add the optimize_boolean: true flag to the ASTā€™s meta here

[Disclaimer: I have practically 0 experience in metaprogramming and erlang, so read this with the phrase ā€œit seems to meā€ in mind]

My curiosity then led me to read the erlang source code for expand_case where this flag is used. There it checks if the expression youā€™re branching on returns_boolean and if so optimizes the case depending on the shape of the true/false branches.

If the false branch matches the AST [{'when', _, [Var, {{'.', _, ['Elixir.Kernel', 'in']}, _, [Var, [false, nil]]}]}] then it rewrites the case clause to [false] and optimizes away the Kernel.in call, which is exactly what is sent to optimize_boolean from the code you analysed in the post!

In summary, if the if statement will return a boolean, then thereā€™s no need to check for nil inclusion in the list with in/2.

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798

Glad you liked it!

And thanks for sharing what you found re: optimize_boolean. I noticed it was setting the flag to true, but just wasnā€™t sure what the purpose of that flag was.

Makes sense that youā€™d want to get rid of Kernel.in if thereā€™s no chance of nil being returned.

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799

Newbie to Elixir but wrote a blog post about integrating with a pub/sub event broker: https://tkthetechie.io/event-driven-elixir/

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800

Last year I wrote five part articles series - ā€œWriting Git in Elixirā€ on medium.com.
Here are the links in case anyone is interested to read -

  1. Building Git in Elixir ā€” Part 1 (Initialize Repo & Store blobs) - https://itnext.io/building-git-in-elixir-part-1-2f2ec245df74?sk=b4ca6c7f4bbfd5b8f74785fc292e8657

  2. Building Git in Elixir ā€” Part 2 (Store Trees & Initial Commit) -
    https://itnext.io/building-git-in-elixir-part-2-store-trees-initial-commit-9013ed02b75a

  3. Building Git in Elixir ā€” Part 3 (Make History & Store Executables)
    https://itnext.io/building-git-in-elixir-part-3-make-history-store-executables-e7dbb39e8e47?sk=3a4f275892e3c4802f20b4b19abcb006

  4. Building Git in Elixir ā€” Part 4 (Store Nested Trees as Merkle Tree) -
    https://itnext.io/building-git-in-elixir-part-4-store-nested-trees-as-merkle-tree-1a236882215a?sk=72d94cf323ba17d08c9580f6345d2e6f

  5. Building Git in Elixir ā€” Part 5 (Build Index) -
    https://itnext.io/building-git-in-elixir-part-5-build-index-e10098836a83?sk=87cd1b215626b01909295704c3ce6bae

Thanks!

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