LetsShip VS language-ext

I have two DigitalOcean sites on the same VPS just serving from kestrel behind an nginx reverse proxy and then one site on a Hetzner VPS where I was playing around with k3s.

For digitalocean I followed this post which is probably way out of date now https://www.hanselman.com/blog/publishing-an-aspnet-core-web...

For the k3s site the source is here https://github.com/EliotJones/LetsShip/blob/main/kubernetes/... though worth noting I have set up LetsEncrypt incorrectly but that's my lack of k3s understanding.

This - https://github.com/EliotJones/LetsShip - hopefully gets you some of the way, it uses VS on Windows for development but I can't imagine the experience in Rider or VS Code for Linux is too disimilar. Individual steps here https://github.com/EliotJones/LetsShip/tree/main/docs/posts

I need to complete the full guide at some point but the end result is an application deployed on Linux with both a web app and independently scalable crawling services with zero downtime deployments. Hosted site here: https://pricefalcon.me/

For a simpler deployment without k3s, this guide is the one I originally followed for my trends site and should still work for .NET 6. https://www.hanselman.com/blog/publishing-an-aspnet-core-web...

One example here https://github.com/EliotJones/LetsShip/blob/main/src/PriceFalcon.JobRunner/Worker.cs#L111 where I have several agent applications each of which may start up to 5 jobs, a job can take a couple of minutes to execute and while running the same request twice isn't the end of the world I'd prefer to avoid it. I use FOR UPDATE when selecting to take an update lock on the row in postgres (similar functionality hopefully exists for your DB).

I just build out a new MVP site for the purposes of a tutorial with .NET 5 and jQuery with some slightly complex front-end requirements (an interactive iFrame that validates user selections server-side on click) and though it may need to move to an SPA if it got more complex for now jQuery is fine (though assuming IE support is not needed I could have probably just used raw JS instead). https://github.com/EliotJones/LetsShip

I've done a complete 180 on this too, I realised I was reacting from my default position of hostility to new concepts rather than an honest appraisal. I am writing it up at the moment but I've been working on a 1 person SAAS MVP tutorial [0] and though I've definitely misconfigured something having the ability to go from git push to deployed to production with 0 downtime inside of 5 minutes with no manual steps is such a nice flow, versus my previous attempts of SCP and faffing around with services.

[0]: https://github.com/EliotJones/LetsShip

You probably noticed that .SetName() returns a Either. You may have come across Unit in libraries like MediatR or Language-Ext. It's a simple construct representing a type with only one possible value. We use it as a placeholder for operations that do not return a value but may return another state. In our example, .SetName() is a Command that does not return a value but may fail. Therefore, the monad Either carries two possible states: Right (without value) or Left (with an Error).

Language-Ext is my personal favourite, but it can be a bit overwhelming for beginners due to its extensive feature set

> but I just want something closer to Scala, but for .Net

That's what I'm working toward with my language-ext library [1]. Obviously more support for expression based programming would be welcome (and higher kinds), but you can do a lot with LINQ and a good integrated library surface.

[1] https://github.com/louthy/language-ext

Definitely a fan of option types, I wonder this library has anything over the C# library language-ext which also has an Option type?

Hey, I am considering adopting the Result pattern in my codebase. Wanted to get some opinions from someone who has experience with it: should I start with language-ext or FunctionalExtensions?

> [1] https://github.com/louthy/language-ext

Cool library. I've had a few of these patterns in my Sasa library for years, but you've taken it to the Haskell extreme! Probably further than most C# developers could stomach. ;-)

You might be interested in checking out the hash array mapped trie from Sasa [1]. It cleverly exploits the CLR's reified generics to unbox the trie at various levels which ends up saving quite a bit of space and indirections, so it performs almost on par with the mutable dictionary.

I had an earlier version that used an outer struct to ensure it's never null, similar to how your collections seem to work, but switched to classes to make it more idiomatic in C#.

I recently started sketching out a Haskell-like generic "Deriving" source generator, contrasted with your domain-specific piecemeal approach, ie. [Record], [Reader], etc. Did you ever try that approach?

[1] https://sourceforge.net/p/sasa/code/ci/default/tree/Sasa.Col...

[2] https://sourceforge.net/p/sasa/code/ci/57417faec5ed442224a0f...

languageext supports linq for its monads and I kinda love it. The challenge is convincing my colleagues. 😅

language-ext supports it and it's pretty dang cool.

I can only recommend c# language extensions library https://github.com/louthy/language-ext