clarkema · HackerTrans

clarkema

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Managing mutable data in Elixir with Rust

lambdafunctions.com

131 pointsby clarkema2 jaar geleden58 comments

Pretty-printing X12 EDI files: racing sed with Rust

lambdafunctions.com

2 pointsby clarkema7 jaar geleden0 comments

comments

vorig jaardiscuss

SEEKING WORK - Remote, travel possible depending on location and duration.

Location: North-east UK

What I do: Fractional CTO / tech lead

Are you being held back by a constraining architecture, slow backend, or a team lacking the depth of experience you need for the next stage of your growth?

Most recently CTO of a regtech startup, I've spent the past 20+ years in a wide variety of tech roles building both products and teams, giving me the perspective to get your project moving without being bound to a particular language or stack.

Previous work:

  * Deterministic AI for medical device regulations and other complex legal systems, including novel language and runtime for regulatory computing (Elixir, Raku, Rust)
    
  * EDI message passing / reconciliation for US dental health insurance market, including X12 parser (Clojure, Common Lisp, Perl, XQuery)

  * Custom domain specific language (DSL) to encode business rules for computer vision system (Common Lisp)

  * University library data migration project, with a focus on completeness and validation. (Clojure, Elixir, Ruby)

  * High-reliability, long-term timelapse platform for inaccessible locations. (FreeBSD, Arduino, Python, Shell)

  * Migration of existing Node.js+Firebase service to Golang+PostgreSQL on AWS

  * Feasibility study investigating the possibility of writing custom code to interface with a biometric timeclock (Common Lisp)

Got something you think is a good fit? Drop me a line at mike -at- lambdafunctions -dot- com

2 jaar geledendiscuss

SEEKING WORK - Remote, travel possible depending on location and duration.

Location: North-east UK

What I do: Fractional CTO / tech lead / senior backend dev

Are you being held back by a constraining architecture, slow backend, or a team lacking the depth of experience you need for the next stage of your growth?

Most recently CTO of a regtech startup, I've spent the past 20+ years in a wide variety of tech roles building both products and teams, giving me the perspective to get your project moving without being bound to a particular language or stack.

Previous work:

- Deterministic AI for medical device regulations and other complex legal systems, including novel language and runtime for regulatory computing (Elixir, Raku, Rust)

- EDI message passing / reconciliation for US dental health insurance market, including X12 parser (Clojure, Common Lisp, Perl, XQuery)

- Custom domain specific language (DSL) to encode business rules for computer vision system (Common Lisp)

- University library data migration project, with a focus on completeness and validation. (Clojure, Elixir, Ruby)

- High-reliability, long-term timelapse platform for inaccessible locations. (FreeBSD, Arduino, Python, Shell)

- Migration of existing Node.js+Firebase service to Golang+PostgreSQL on AWS

- Feasibility study investigating the possiblility of writing custom code to interface with a biometric timeclock (Common Lisp)

Got something you think is a good fit? Drop me a line at mike -at- lambdafunctions -dot- com

2 jaar geledendiscuss

SEEKING WORK - Remote, travel possible depending on location and duration.

Location: North-east UK

What I do: Fractional CTO / tech lead

Are you being held back by a constraining architecture, slow backend, or a team lacking the depth of experience you need for the next stage of your growth?

Most recently CTO of a regtech startup, I've spent the past 20+ years in a wide variety of tech roles building both products and teams, giving me the perspective to get your project moving without being bound to a particular language or stack.

Previous work:

- Deterministic AI for medical device regulations and other complex legal systems, including novel language and runtime for regulatory computing (Elixir, Raku, Rust)

- EDI message passing / reconciliation for US dental health insurance market, including X12 parser (Clojure, Common Lisp, Perl, XQuery)

- Custom domain specific language (DSL) to encode business rules for computer vision system (Common Lisp)

- University library data migration project, with a focus on completeness and validation. (Clojure, Elixir, Ruby)

- High-reliability, long-term timelapse platform for inaccessible locations. (FreeBSD, Arduino, Python, Shell)

- Migration of existing Node.js+Firebase service to Golang+PostgreSQL on AWS

- Feasibility study investigating the possiblility of writing custom code to interface with a biometric timeclock (Common Lisp)

Got something you think is a good fit? Drop me a line at mike -at- lambdafunctions -dot- com

2 jaar geledendiscuss

SEEKING WORK - Remote, travel possible depending on location and duration.

Location: North-east UK

What I do: Fractional CTO / tech lead

Are you being held back by a constraining architecture, slow backend, or a team lacking the depth of experience you need for the next stage of your growth?

Most recently CTO of a regtech startup, I've spent the past 20+ years in a wide variety of tech roles building both products and teams, giving me the perspective to get your project moving without being bound to a particular language or stack.

Previous work:

  * Deterministic AI for medical device regulations and other complex legal systems, including novel language and runtime for regulatory computing (Elixir, Raku, Rust)
    
  * EDI message passing / reconciliation for US dental health insurance market, including X12 parser (Clojure, Common Lisp, Perl, XQuery)

  * Custom domain specific language (DSL) to encode business rules for computer vision system (Common Lisp)

  * University library data migration project, with a focus on completeness and validation. (Clojure, Elixir, Ruby)

  * High-reliability, long-term timelapse platform for inaccessible locations. (FreeBSD, Arduino, Python, Shell)

  * Migration of existing Node.js+Firebase service to Golang+PostgreSQL on AWS

  * Feasibility study investigating the possiblility of writing custom code to interface with a biometric timeclock (Common Lisp)

Got something you think is a good fit? Drop me a line at mike -at- lambdafunctions -dot- com

2 jaar geledendiscuss

SEEKING WORK - Remote, travel possible depending on location and duration.

Location: North-east UK

What I do: Senior backend dev / tech lead / fractional CTO

Are you being held back by a constraining architecture, slow backend, or a team lacking the depth of experience you need for the next stage of your growth?

Most recently CTO of a regtech startup, I've spent the past 20+ years in a wide variety of tech roles building both products and teams, giving me the perspective to get your project moving without being bound to a particular language or stack.

Previous work:

  * Deterministic AI for medical device regulations and other complex legal systems, including novel language and runtime for regulatory computing (Elixir, Raku, Rust)
    
  * EDI message passing / reconciliation for US dental health insurance market, including X12 parser (Clojure, Common Lisp, Perl, XQuery)

  * Custom domain specific language (DSL) to encode business rules for computer vision system (Common Lisp)

  * University library data migration project, with a focus on completeness and validation. (Clojure, Elixir, Ruby)

  * High-reliability, long-term timelapse platform for inaccessible locations. (FreeBSD, Arduino, Python, Shell)

  * Migration of existing Node.js+Firebase service to Golang+PostgreSQL on AWS

  * Feasibility study investigating the possibility of writing custom code to interface with a biometric timeclock (Common Lisp)

Got something you think is a good fit? Drop me a line at mike -at- lambdafunctions -dot- com

2 jaar geledendiscuss

SEEKING WORK - Remote, travel possible depending on location and duration.

Location: North-east UK

What I do: Senior backend dev / tech lead / fractional CTO

Are you being held back by a constraining architecture, slow backend, or a team lacking the depth of experience you need for the next stage of your growth?

Most recently CTO of a regtech startup, I've spent the past 20+ years in a wide variety of tech roles building both products and teams, giving me the perspective to get your project moving without being bound to a particular language or stack.

Previous work:

  * Deterministic AI for medical device regulations and other complex legal systems, including novel language and runtime for regulatory computing (Elixir, Raku, Rust)
    
  * EDI message passing / reconciliation for US dental health insurance market, including X12 parser (Clojure, Common Lisp, Perl, XQuery)

  * Custom domain specific language (DSL) to encode business rules for computer vision system (Common Lisp)

  * University library data migration project, with a focus on completeness and validation. (Clojure, Elixir, Ruby)

  * High-reliability, long-term timelapse platform for inaccessible locations. (FreeBSD, Arduino, Python, Shell)

  * Migration of existing Node.js+Firebase service to Golang+PostgreSQL on AWS

  * Feasibility study investigating the possiblility of writing custom code to interface with a biometric timeclock (Common Lisp)

Got something you think is a good fit? Drop me a line at mike -at- lambdafunctions -dot- com

2 jaar geledendiscuss

SEEKING WORK - Remote, travel possible depending on location and duration.

Location: North-east UK

What I do: Senior backend dev / tech lead / fractional CTO

Are you being held back by a constraining architecture, slow backend, or a team lacking the depth of experience you need for the next stage of your growth?

Most recently CTO of a regtech startup, I've spent the past 20+ years in a wide variety of tech roles building both products and teams, giving me the perspective to get your project moving without being bound to a particular language or stack.

Previous work:

  - Deterministic AI for medical device regulations and other complex legal systems, including novel language and runtime for regulatory computing (Elixir, Raku, Rust)
    
  - EDI message passing / reconciliation for US dental health insurance market, including X12 parser (Clojure, Common Lisp, Perl, XQuery)

  - Custom domain specific language (DSL) to encode business rules for computer vision system (Common Lisp)

  - University library data migration project, with a focus on completeness and validation. (Clojure, Elixir, Ruby)

  - High-reliability, long-term timelapse platform for inaccessible locations. (FreeBSD, Arduino, Python, Shell)

  - Migration of existing Node.js+Firebase service to Golang+PostgreSQL on AWS

  - Feasibility study investigating the possiblility of writing custom code to interface with a biometric timeclock (Common Lisp)

Got something you think is a good fit? Drop me a line at mike -at- lambdafunctions -dot- com

2 jaar geledendiscuss

SEEKING WORK - Remote, travel possible depending on location and duration.

Location: North-east UK

What I do: Senior backend dev / tech lead / fractional CTO

Are you being held back by a constraining architecture, slow backend, or a team lacking the depth of experience you need for the next stage of your growth?

Most recently CTO of a regtech startup, I've spent the past 20+ years in a wide variety of tech roles building both products and teams, giving me the perspective to get your project moving without being bound to a particular language or stack.

Previous work:

* Deterministic AI for medical device regulations and other complex legal systems, including novel language and runtime for regulatory computing (Elixir, Raku, Rust)

* EDI message passing / reconciliation for US dental health insurance market, including X12 parser (Clojure, Common Lisp, Perl, XQuery)

* Custom domain specific language (DSL) to encode business rules for computer vision system (Common Lisp)

* University library data migration project, with a focus on completeness and validation. (Clojure, Elixir, Ruby)

* High-reliability, long-term timelapse platform for inaccessible locations. (FreeBSD, Arduino, Python, Shell)

* Migration of existing Node.js+Firebase service to Golang+PostgreSQL on AWS

* Feasibility study investigating the possiblility of writing custom code to interface with a biometric timeclock (Common Lisp)

Got something you think is a good fit? Drop me a line at mike -at- lambdafunctions -dot- com

2 jaar geledendiscuss

SEEKING WORK - Remote, travel possible depending on location and duration.

Location: North-east UK

What I do: Senior backend dev / tech lead / fractional CTO

Are you being held back by a constraining architecture, slow backend, or a team lacking the depth of experience you need for the next stage of your growth?

Most recently CTO of a regtech startup, I've spent the past 20+ years in a wide variety of tech roles building both products and teams, giving me the perspective to get your project moving without being bound to a particular language or stack.

Previous work:

  * Deterministic AI for medical device regulations and other complex legal systems, including novel language and runtime for regulatory computing (Elixir, Raku, Rust)
    
  * EDI message passing / reconciliation for US dental health insurance market, including X12 parser (Clojure, Common Lisp, Perl, XQuery)

  * Custom domain specific language (DSL) to encode business rules for computer vision system (Common Lisp)

  * University library data migration project, with a focus on completeness and validation. (Clojure, Elixir, Ruby)

  * High-reliability, long-term timelapse platform for inaccessible locations. (FreeBSD, Arduino, Python, Shell)

  * Migration of existing Node.js+Firebase service to Golang+PostgreSQL on AWS

  * Feasibility study investigating the possiblility of writing custom code to interface with a biometric timeclock (Common Lisp)

Got something you think is a good fit? Drop me a line at mike -at- lambdafunctions -dot- com

2 jaar geledendiscuss

In our case one of these NIF stores is created per user for a specific task; ironically, with the amount of polish that Rustler puts around NIFs I suspect it would have been more work and more risk to go down the port route and manage everything manually.

2 jaar geledendiscuss

No, it doesn't -- looking at the website that's an explicit trade-off of pure performance vs 'Elixir-ish-ness'. It would certainly break a lot of expectations to have data mutating like that without it being hidden away somewhere, so I can understand why they went that way.

In my case the data I'm dealing with is more of a store than a single data item, so I'm leaning on the example of things like ETS. Also it's within a single application rather than being a large generally-available library, so the trade-offs are different. It would be interesting to know if they did tests though.

2 jaar geledendiscuss

Explorer does actually use Rust (and polars) for a lot of its work -- its one on the libraries I looked at while figuring out my memory management issues.

2 jaar geledendiscuss

That's an interesting point that I should perhaps have covered in the original article.

The real code that this is based on is in fact hidden behind a GenServer for this exact reason -- to maintain the expectations of other Elixir code that has to interact with it. The advantage of the escape hatch, as another commenter mentions, is allowing efficient sparse mutations of a large chunk of data, without having to pay a copy penalty every time. I definitely wouldn't recommend sharing the db handle widely.

2 jaar geledendiscuss

I have a 'study' setup using a Boox Mira (portable 13" eink screen) for exactly this kind of use; not polyphasic in my particular case but late evening use. Yes, the screen is expensive, but _totally_ worth it.

2 jaar geledendiscuss

SEEKING WORK - Remote, travel possible depending on location and duration.

Location: North-east UK

What I do: Senior backend dev / tech lead / fractional CTO

Most recently CTO of a regtech startup, in the past I've been a network engineer, run large-scale Debian installations doing devops before it had a name, and been responsible for servers in Antarctica. I have experience with a wide range of different Unix tools and technologies, at various levels of the stack. This gives me the ability—and the perspective—to pick the best combination of tools for any particular project, rather than simply treating everything as a nail because all I have is a hammer.

Previous work:

  * Deterministic AI for medical device regulations and other complex legal systems, including novel language and runtime for regulatory computing (Elixir, Raku, Rust)
    
  * EDI message passing / reconciliation for US dental health insurance market, including X12 parser (Clojure, Common Lisp, Perl, XQuery)

  * Custom domain specific language (DSL) to encode business rules for computer vision system (Common Lisp)

  * University library data migration project, with a focus on completeness and validation. (Clojure, Elixir, Ruby)

  * High-reliability, long-term timelapse platform for inaccessible locations. (FreeBSD, Arduino, Python, Shell)

  * Migration of existing Node.js+Firebase service to Golang+PostgreSQL on AWS

  * Feasibility study investigating the possiblility of writing custom code to interface with a biometric timeclock (Common Lisp)

Got something you think is a good fit? Drop me a line at mike -at- lambdafunctions -dot- com

3 jaar geledendiscuss

SEEKING WORK - Remote, travel possible depending on location and duration.

Location: North-east UK

What I do: I take MVPs that you’ve outgrown and upgrade them to support the next stage of your growth.

There could be any number of reasons why your current system is holding you back. Wherever you’re starting to feel the pinch, the price of ownership is that you don’t have the luxury of saying “that part’s not my problem” or “I don’t get involved at that level.”

You won’t hear it from me, either.

20 years handling a wide variety of IT roles and projects mean that I can help through the whole process from high-level strategy right down to code, all based on a deep technical foundation.

In the past I've been a network engineer, run large-scale Debian installations doing devops before it had a name, and been responsible for servers in Antarctica. I have experience with a wide range of different Unix tools and technologies, at various levels of the stack. This gives me the ability—and the perspective—to pick the best combination of tools for any particular project, rather than simply treating everything as a nail because all I have is a hammer.

Buzzwords: Debian, Ubuntu, AWS, PostgreSQL, Clojure, Elixir, Perl, Raku, Common Lisp, Rust, Ruby, Go

Got something you think is a good fit? Drop me a line at mike -at- lambdafunctions -dot- com

3 jaar geledendiscuss

Caveman here. I put the washing in and then set a countdown timer on my watch.

3 jaar geledendiscuss

I just tried logging in and found that it hangs indefinitely. This seems to be because shhhbb.com has a AAAA record that the BBS isn't listening on:

> debug1: Connecting to shhhbb.com [2a01:4ff:1f0:8a78::] port 2223

If I connect with `ssh 5.78.86.154 -p 2223` instead I get in fine.

Maybe either have the server listen on v6 / adjust the packet filter or stop shhhbb.com resolving its AAAA address, which is currently taking priority for me.

3 jaar geledendiscuss

SEEKING WORK - Remote, travel possible depending on location and duration.

Location: North-east UK

What I do: I take MVPs that you’ve outgrown and upgrade them to support the next stage of your growth.

There could be any number of reasons why your current system is holding you back. Wherever you’re starting to feel the pinch, the price of ownership is that you don’t have the luxury of saying “that part’s not my problem” or “I don’t get involved at that level.”

You won’t hear it from me, either.

20 years handling a wide variety of IT roles and projects mean that I can help through the whole process from high-level strategy right down to code, all based on a deep technical foundation.

In the past I've been a network engineer, run large-scale Debian installations doing devops before it had a name, and been responsible for servers in Antarctica. I have experience with a wide range of different Unix tools and technologies, at various levels of the stack. This gives me the ability—and the perspective—to pick the best combination of tools for any particular project, rather than simply treating everything as a nail because all I have is a hammer.

Buzzwords: Debian, Ubuntu, AWS, PostgreSQL, Clojure, Elixir, Perl, Raku, Common Lisp, Rust, Ruby, Go

Got something you think is a good fit? Drop me a line at mike -at- lambdafunctions -dot- com

3 jaar geledendiscuss

We don't "establish" civilization. We take it with us.