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F# vs Haskell: What are the differences?
Key Differences between F# and Haskell
F# and Haskell are both functional programming languages that share many similarities, but they also have notable differences. Here are six key differences between F# and Haskell:
Type Inference: F# has a more flexible and lenient type inference system compared to Haskell. F# allows a mix of statically inferred types and explicit type annotations, while Haskell relies heavily on type inference and requires explicit type declarations in many cases.
Immutability: Immutability is a core principle in both F# and Haskell, but F# allows mutation through references or mutable variables with the
mutablekeyword, while Haskell strictly enforces immutability and does not have mutable variables.Pattern Matching: Pattern matching is a powerful feature in both languages, but F# supports active patterns which allows for more complex and expressive pattern matching capabilities. Haskell, on the other hand, uses guards in addition to pattern matching to provide more flexibility.
Evaluation Strategy: Haskell uses lazy evaluation by default, meaning that expressions are not evaluated until their values are actually needed. In contrast, F# follows eager evaluation, where expressions are evaluated as soon as they are bound.
Interop with Other .NET Languages: F# is part of the .NET ecosystem and seamlessly integrates with other .NET languages like C#, Visual Basic, and more. This makes it easier to leverage existing .NET libraries and frameworks in F# programming. Haskell, on the other hand, does not have native interoperability with other languages and ecosystems.
Library and Framework Ecosystem: F# benefits from a larger library and framework ecosystem due to its integration with .NET. It can leverage a vast number of existing libraries and frameworks built for the .NET platform. While Haskell also has a rich ecosystem, especially for academic and functional programming domains, it may not have the same breadth of libraries and frameworks as F#.
In summary, F# and Haskell have differences in type inference, mutability, pattern matching, evaluation strategy, interoperability, and library ecosystems, making them suitable for different use cases and programming contexts.
Hi there. I want to expand my coding toolset. So I want to learn a second backend language besides Kotlin. Kotlin is fantastic. I love it in every aspect, and I think I can never return to Java. And also why should I? It is 100% interoperable with java and can co-exist in every project.
So my question here is. Which language do you think will bring me more joy? I think F#; it is more like Kotlin. Then C# (it's more or like 100% java). But, let's say I learn F#. Is it 100% interoperable like Kotlin? can they live side by side? Can I, then, apply to .NET jr jobs after a while, for example, or is C# the holy cow? I would like to learn .Net.
If it is the worst and only C# is acceptable, then which language should I learn? Dart? Go?
animefanx1,
First let's get your questions sorted: Which language do you think will bring me more joy?
This you will have to decide for yourself, I am a long time C# developer and have seen it grow into a very compelling platform. The language and I'd compare it more to Kotlin than Java (by a long margin). More on .NET in a bit.
say I learn F#. Is it 100% interoperable like Kotlin?
You can have 100% interop with a caveat, your F# libraries have to implement certain guidance in order to be referenced from C#. Some (dare I say most) of the differences between F# and C# are predicated on language constructs that are not available in C#. For instance F# functions that return Unit.
can they live side by side?
Yes.
Can I, then, apply to .NET jr jobs after a while, for example, or is C# the holy cow?
I don't know if I take your meaning, but let me say this: Learning either C# or F# will likely force you to understand concepts such as garbage collection, primitive types, etc. which apply to all .NET languages, thus a lot of the effort you put into .NET is bound to pay off regardless of your choice.
If it is the worst and only C# is acceptable, then which language should I learn? Dart? Go? You can't go wrong with any of these and I venture to say whether you select C#, F#, Dart or Go as your next adventure, your willingness to learn will take you to try other languages, some which mey not even exist yet!
PS1: .NET is an end to end environment now. With the introduction of Blazor and Razor pages one does not need JavaScript or other browser scripting languages, it even interops with JavaScript. PS2. Microsoft is working on unifying .NET. Soon there will be only one version: .NET 5! Caveat: Some features such as WinForms will still be specific to the windows environment but all of those are likely things you don't need in Mac or Linux
Exceptional decision to go with Kotlin. For the other story, go full with C#. "is C# the holy cow? Yes it is.". Specially now when netCore is crossplatform and you can build asp.net core applications on Windows, Linux and macOS via Visual Studio Code which is also multiplatform. Nothing will beat C# in the near future. Also, at the end of 2021 Microsoft will release Net 6.0 which will include MAUI.
"For those new to .NET MAUI (standing for .NET Multi-platform App UI), Microsoft says it's "the evolution of Xamarin.Forms extended from mobile to desktop scenarios with UI controls rebuilt from the ground up for performance and extensibility."
So, C# all the way sire!
I think you can learn go instead C#. C# is cool, but Golang also cool. It can run on any OS without specific software. C# can run on linux too but it's only the .NET Core as I know. But golang is flexible. So try it and decide what do you think about Golang
We have a lot of experience in JavaScript, writing our services in NodeJS allows developers to transition to the back end without any friction, without having to learn a new language. There is also the option to write services in TypeScript, which adds an expressive type layer. The semi-shared ecosystem between front and back end is nice as well, though specifically NodeJS libraries sometimes suffer in quality, compared to other major languages.
As for why we didn't pick the other languages, most of it comes down to "personal preference" and historically grown code bases, but let's do some post-hoc deduction:
Go is a practical choice, reasonably easy to learn, but until we find performance issues with our NodeJS stack, there is simply no reason to switch. The benefits of using NodeJS so far outweigh those of picking Go. This might change in the future.
PHP is a language we're still using in big parts of our system, and are still sometimes writing new code in. Modern PHP has fixed some of its issues, and probably has the fastest development cycle time, but it suffers around modelling complex asynchronous tasks, and (on a personal note) lack of support for writing in a functional style.
We don't use Python, Elixir or Ruby, mostly because of personal preference and for historic reasons.
Rust, though I personally love and use it in my projects, would require us to specifically hire for that, as the learning curve is quite steep. Its web ecosystem is OK by now (see https://www.arewewebyet.org/), but in my opinion, it is still no where near that of the other web languages. In other words, we are not willing to pay the price for playing this innovation card.
Haskell, as with Rust, I personally adore, but is simply too esoteric for us. There are problem domains where it shines, ours is not one of them.
Pros of F#
- Pattern-matching53
- Makes programming fun again42
- Type providers38
- Delightful32
- Frictionless30
- Static type inference26
- Composable21
- Ml syntax19
- REPL17
- Succinct17
- DDD10
- Making invalid states impossible9
- Great community7
- WebSharper7
- Language support for units of measure7
- Functional Programming6
- Powerful6
- Beautiful Code5
- Compact5
- Multiplatform5
- Functional paradigm5
- Computation Expressions5
- Open source5
- Less bugs5
- Productive5
- Allow use JS and .NET libraries4
- Object oriented features4
- Fun to write4
Pros of Haskell
- Purely-functional programming90
- Statically typed66
- Type-safe59
- Open source39
- Great community38
- Built-in concurrency31
- Built-in parallelism30
- Composable30
- Referentially transparent24
- Generics20
- Type inference15
- Intellectual satisfaction15
- If it compiles, it's correct12
- Flexible8
- Monads8
- Great type system5
- Proposition testing with QuickCheck4
- One of the most powerful languages *(see blub paradox)*4
- Purely-functional Programming4
- Highly expressive, type-safe, fast development time3
- Pattern matching and completeness checking3
- Great maintainability of the code3
- Fun3
- Reliable3
- Best in class thinking tool2
- Kind system2
- Better type-safe than sorry2
- Type classes2
- Predictable1
- Orthogonality1
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Cons of F#
- Microsoft tend to ignore F# preferring to hype C#3
- Interop between C# can sometimes be difficult2
- Hype1
- Type Providers can be unstable in larger solutions1
Cons of Haskell
- Too much distraction in language extensions9
- Error messages can be very confusing8
- Libraries have poor documentation5
- No good ABI3
- No best practices3
- Poor packaging for apps written in it for Linux distros2
- Sometimes performance is unpredictable2
- Slow compilation1
- Monads are hard to understand1
