Is Rust functional?
In the past few months, and in particular in the past two weeks, I’ve gotten a number of people asking me the question: Is Rust a functional programming language? This makes sense: I’m a big advocate of functional programming, I work at a company with FP in its name, my primary programming language is Haskell, and yet I use and enjoy Rust. So is Rust consistent with everything else in my FP-centri
Iterators and Streams in Rust and Haskell - FP Complete
Streaming data is a problem domain I’ve played with a lot in Haskell. In Haskell, the closest we come to built-in streaming data support is laziness-by-default, which doesn’t fully capture streaming data. (I’m not going into those details today, but if you want to understand this better, there’s plenty of information in the conduit tutorial.) Real streaming data is handled at the library level in
Call C functions from Haskell without bindings - FP Complete
Because Haskell is a language of choice for many problem domains, and for scales ranging from one-off scripts to full scale web services, we are fortunate to by now have over 8,000 open source packages (and a few commercial ones besides) available to build from. But in practice, Haskell programming in the real world involves interacting with myriad legacy systems and libraries. Partially because t
Overloading Monads for Html Deployment - School of Haskell | FP Complete
Stackage Learn how our Stackage project is helping solve Haskell's stable library problem. Blog Latest Haskell News The latest updates on everything Haskell. Haskell news by Chris Done. Haskell News It can be tedious migrating an app. I often ask myself, "did I use an absolute or a relative path?" "Did I use the correct hostname?" "Am I going to inline any JavaScript or Css, or use an external l
Monoids Tour - School of Haskell | School of Haskell
Interactive code snippets not yet available for SoH 2.0, see our Status of of School of Haskell 2.0 blog post Like the term "monad", "monoid" can be a bit intimidating: Why would I want to think about math while I'm doing real world programming?!? One answer is that thinking in terms of monoids can be very beneficial to parallelism and efficient data structures. Using the Monoid interface in Haske
Haskell Web Server in a 5MB Docker Image - FP Complete
The Problem Recently we needed to redirect all Amazon Elastic Load Balancer (ELB) HTTP traffic to HTTPS. AWS ELB doesn’t provide this automatic redirection as a service. ELB will, however, let you map multiple ports from the ELB into the auto-scaling cluster of nodes attached to that ELB. People usually just point both port 80 & 443 to a webserver that is configured to redirect traffic through the
School of Haskell 2.0 - FP Complete
As announced by Michael Snoyman a couple weeks ago, we are going to be releasing an open source version of the School of Haskell! The SoH provides interactive documentation and tutorials for newcomers and advanced haskellers alike. This interactivity comes in the form of editable code, inline in the webpage, letting you try things out as you learn them. We are dedicated to supporting the community
Functor, Applicative, and Monad - School of Haskell | School of Haskell
Interactive code snippets not yet available for SoH 2.0, see our Status of of School of Haskell 2.0 blog post NOTE This content is now being maintained on my personal blog. The content here may be out of date. Let's start off with a very simple problem. We want to let a user input his/her birth year, and tell him/her his/her age in the year 2020. Using the function read, this is really simple: mai
I love profunctors. They're so easy. - School of Haskell | School of Haskell
Interactive code snippets not yet available for SoH 2.0, see our Status of of School of Haskell 2.0 blog post “I love profunctors. They're so easy.” —beaky on #haskell [日本語版] Covariant FunctorsI hope we can all agree that functors are useful, and that we are all familiar with them. Just for the record, the Functor typeclass can be thought of as follows: class Functor f where fmap ∷ (a → b) → f a →
Primitive Haskell - FP Complete
I originally wrote this content as a chapter of Mezzo Haskell. I’m going to be starting up a similar effort to Mezzo Haskell in the next few days, and I wanted to get a little more attention on this content to get feedback on style and teaching approach. I’ll be discussing that new initiative on the Commercial Haskell mailing list. The point of this chapter is to help you peel back some of the lay
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