language-ext
FSharpPlus
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language-ext | FSharpPlus | |
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41 | 6 | |
6,159 | 821 | |
- | 1.7% | |
6.9 | 8.8 | |
5 days ago | 2 months ago | |
C# | F# | |
MIT License | Apache License 2.0 |
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language-ext
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The Monad Invasion - Part 2: Monads in Action!
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).
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The Monad Invasion - Part 1: What's a Monad?
Language-Ext is my personal favourite, but it can be a bit overwhelming for beginners due to its extensive feature set
- Why don't you just use F#?
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The combined power of F# and C#
> 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
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Option<T> monad for Unity/UniTask
Definitely a fan of option types, I wonder this library has anything over the C# library language-ext which also has an Option type?
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Result pattern: language-ext vs FunctionalExtensions?
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?
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John Carmack on Functional Programming in C++ (2018)
> [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...
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Don't sleep on Linq query syntax if you regularly iterate through large/complex data sources
languageext supports linq for its monads and I kinda love it. The challenge is convincing my colleagues. 😅
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What C# feature blew your mind when you learned it?
language-ext supports it and it's pretty dang cool.
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It's actually not that bad...
I can only recommend c# language extensions library https://github.com/louthy/language-ext
FSharpPlus
- Is it possible to add a NuGet package dependency to a project that points to a GitHub repository?
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What is the difference between an Applicative and a Monad?
This should all be prefaced by saying that F# tends to avoid such category theory generalizations (unless you're using a library such as F#+ ). So, while I would encourage your continued understanding of the theory (it can be fun!), it's not as practical for writing good F# code as it would be in, say, Haskell. There are no type classes in Haskell, nor are there plans to add them.
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Don Syme explains the downsides of type classes and the technical and philosophical reasons for not implementing them in F#
There maybe be a way to make it not have overhead. But there is precedent that this is not the case with Statically Resolved Type Parameters, and existing mechanism in F# that already lets you encode Haskell-style typeclasses and is the backbone of FSharpPlus, a typelevel (and more) library for F#. Solving constraints like this at compile-time (as opposed to having a runtime natively understand them) absolutely, positively leads to explosive compile times if you're not careful. I worked on the F# compiler for 5 years and I can attest to numerous reports related to accidental compile-time explosions just because SRTPs or inline was used a particular way.
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Practically speaking, what does F#'s lack of higher-typed kinds mean?
F# devs tend to use SRTP (Statically resolved type parameters) see F#+ https://github.com/fsprojects/FSharpPlus .
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F#+ 1.2 Released 🔷🚀
F#+ (FSharpPlus) 1.2 released with the following changes:
What are some alternatives?
OneOf - Easy to use F#-like ~discriminated~ unions for C# with exhaustive compile time matching
aether - Optics for F#
CSharpFunctionalExtensions - Functional extensions for C#
fslang-suggestions - The place to make suggestions, discuss and vote on F# language and core library features
Optional - A robust option type for C#
hacn - A "monad" or DSL for creating React components using Fable and F# computation expressions
MoreLINQ - Extensions to LINQ to Objects
Mondocks - An alternative way to interact with MongoDB databases from F# that allows you to use mongo-idiomatic constructs
Curryfy - Provides strongly typed extensions methods for C# delegates to take advantages of functional programming techniques, like currying and partial application.
FStar - A Proof-oriented Programming Language
VisualFSharp - The F# compiler, F# core library, F# language service, and F# tooling integration for Visual Studio
csharplang - The official repo for the design of the C# programming language