fn.py VS Rx.NET

Compare fn.py vs Rx.NET and see what are their differences.

fn.py

Functional programming in Python: implementation of missing features to enjoy FP (by kachayev)

Rx.NET

The Reactive Extensions for .NET (by dotnet)
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fn.py Rx.NET
2 61
3,320 6,439
- 1.6%
0.0 6.6
over 1 year ago 16 days ago
Python C#
Apache License 2.0 MIT License
The number of mentions indicates the total number of mentions that we've tracked plus the number of user suggested alternatives.
Stars - the number of stars that a project has on GitHub. Growth - month over month growth in stars.
Activity is a relative number indicating how actively a project is being developed. Recent commits have higher weight than older ones.
For example, an activity of 9.0 indicates that a project is amongst the top 10% of the most actively developed projects that we are tracking.

fn.py

Posts with mentions or reviews of fn.py. We have used some of these posts to build our list of alternatives and similar projects. The last one was on 2021-12-20.

Rx.NET

Posts with mentions or reviews of Rx.NET. We have used some of these posts to build our list of alternatives and similar projects. The last one was on 2023-06-20.
  • Patterns for consuming a throttled/rate limited external APIs?
    2 projects | /r/dotnet | 20 Jun 2023
    https://github.com/dotnet/reactive has a lot of different time related extensions for "events". Maybe you'll find something for yourself, if you google for rate limiting with reactive.
  • How can you detect when a user has stopped scrolling with WPF
    2 projects | /r/csharp | 17 Apr 2023
    Install Reactive Extensions: https://github.com/dotnet/reactive
  • MVVM Question: How do you manage the interaction between Model and ViewModel?
    4 projects | /r/csharp | 3 Apr 2023
    I'd use a dedicated event bus based on Reactive Extensions or MediatR to publish domain events from your domain services. This probably doesn't solve all your ViewModel update problems as is, maybe you need to revise the granularity (maybe you can have smaller ViewModels that refresh single property that exposes the Model) and lifespan (sometimes you can create a ViewModel, make it perform it's task and then discard it completely) of your ViewModels.
    4 projects | /r/csharp | 3 Apr 2023
    Typically if you want to notify interested parties (ViewModels in case of WPF) of Model changes you'd use some kind of pub-sub mechanism like Reactive Extensions or MediatR. Your ViewModel can subscribe to an event bus of some kind (either standalone or maybe exposed by an Aggregate if you follow DDD), your domain logic (which should be located in Model layer, not in ViewModel layer: Service, Repository, DDD Aggregate or whatever you'd like to call it) will then do something useful with your Model and publish the corresponding event to the event bus.
  • Async Methods after setting a property.
    2 projects | /r/csharp | 16 Mar 2023
    If you're finding yourself in a situation where you need to turn this behavior into a pattern because there are a lot of View Models that need to execute async business logic in response to some changes, I'd go with something like MediatR or Reactive Extensions. The idea is, again, that some other, probably business-level, component listens to changes in a decoupled way (that means it doesn't subscribe directly to your View Model, but to an event bus instead). View Model publishes change events to the event bus, and business-component reacts to these events by executing the business logic.
  • System.Reactive v6.0.0-preview.1 available on NuGet
    3 projects | /r/dotnet | 11 Mar 2023
    We'd really appreciate if it consumers of the library could update and provide any issues / bugs via the GitHub repo: https://github.com/dotnet/reactive/issues
  • Brett Slatkin: Why am I building a new functional programming language?
    10 projects | news.ycombinator.com | 5 Mar 2023
    The thing that really irks me is that the generator pattern doesn't have to be an OO-first feature. Observable streams[1] work with the same basic foundation and those are awesome for FP.

    [1]: https://reactivex.io/

  • What Are Signals?
    2 projects | news.ycombinator.com | 4 Mar 2023
    > I’m not sure what you mean by "Rx" in this context.

    From “reactive extensions”, a proper name for a family of libraries[1] (RxJava, Rx.NET, RxJS), AFAICT one of the first attempted implementations of mature FRP ideas in the imperative world and one messy enough that it took React for anything similar to reënter the mainstream.

    Compare the enthusiastic HN reception of “Deprecating the observer pattern” in 2011[2], mostly from people who heard of FRP in the functional setting, and the vitriol it received in 2018[3], from people for whom FRP came to mean Rx (and similarly confused things like Bacon.js). It is this vitriol that I meant to preemptively redirect by the mention of FRP ≠ Rx, so if you’re not aware of this history it’s no big loss to ignore it.

    [1] https://reactivex.io/

    [2] https://news.ycombinator.com/item?id=2972581

    [3] https://news.ycombinator.com/item?id=17845341

  • I love LINQ and the Entity Framework
    3 projects | /r/dotnet | 21 Oct 2022
    If you love LINQ, you'll like Rx.NET even more - iterating over events https://reaqtive.net/blog/2021/05/sequences-linq-rx-reaqtor-part-02-linq Or possibly even OData (LINQ to REST api)
  • Just “Discovered” Linq. Now Whole Program is Full of Linq.
    4 projects | /r/csharp | 5 Oct 2022

What are some alternatives?

When comparing fn.py and Rx.NET you can also consider the following projects:

Toolz - A functional standard library for Python.

Dynamic Data - Reactive collections based on Rx.Net

funcy - A fancy and practical functional tools

Pyrsistent - Persistent/Immutable/Functional data structures for Python

Coconut - Simple, elegant, Pythonic functional programming.

CyToolz - Cython implementation of Toolz: High performance functional utilities

RxJS - A reactive programming library for JavaScript

ObservableComputations - Cross-platform .NET library for computations whose arguments and results are objects that implement INotifyPropertyChanged and INotifyCollectionChanged (ObservableCollection) interfaces.

returns - Make your functions return something meaningful, typed, and safe!

effect - effect isolation in Python, to facilitate more purely functional code

Deal - 🤝 Design by contract for Python. Write bug-free code. Add a few decorators, get static analysis and tests for free.

classes - Smart, pythonic, ad-hoc, typed polymorphism for Python