ekmett

Anon, a young researcher, sits down with Saunders Mac Lane.

Anon: Please, explain to me in full detail, everything you know about category theory. Indicate where you are uncertain so I may better understand your epistemic state.

-- End Prompt

Saunders: It's the foundation of modern mathematics and computer science. It deals with sets of objects called categories, which can be thought of as collections of things. For example, there is a set called the natural numbers that we use for counting. There is also another set called the real numbers, which are used for computing. The idea behind it is that if two things are in one category, then they must have some relationship to each other. If two things are in two different categories, then they probably don't have any relationship to each other.

Anon: Can you describe how these objects and arrows get used in practice?

Lysxia

{-# LANGUAGE DeriveFunctor, DeriveFoldable, DeriveTraversable, TypeFamilies, TemplateHaskell #-}

import Data.Functor.Foldable
import Data.Functor.Foldable.TH
import Data.Functor.Compose

-- Example type
data Exp
  = IntValue Int
  | Sum Exp Exp

rchikhi

Wheeler graphs

Gagie, Manzini, Siren
Theoretical Computer Science, 2017
https://www.sciencedirect.com/science/article/pii/S0304397517305285

Notes of a whiteboard presentation to the Bonsai team in Lille.
These notes largely follow the paper.
Rayan Chikhi, 2019

LSLeary

{-# LANGUAGE TypeOperators, PatternSynonyms, ExplicitNamespaces #-}
{-# LANGUAGE LambdaCase, BlockArguments #-}

module Select
  ( type (-?)(Fun, Const, Lazy, unLazy), ($?)
  , Selective(..)
  , select, branch, whenS, ifS, whileS, fromMaybeS
  , (<||>), (<&&>), anyS, allS
  , Monad(..)
  ) where

graninas

Building network actors with Node Framework

Article topics:

• What is Node Framework?
• Sample nodes
• Node Framework languages structure
  • Core languages
  • Framework languages
• Node Framework design and architecture

taktoa

I started writing this polemic to answer your question, but I ended up touching on most of my gripes with Haskell in general, not just in a corporate context.

GHC

GHC is a modern compiler with an amazing RTS and tons of features, but I have some issues with it.

Monolithic and Hard to Contribute To

lattner

Swift Concurrency Manifesto

Author: Chris Lattner

Chinese Translation by Jason Yu

Contents

• Introduction
• Overall Vision

lattner

Async/Await for Swift

• Proposal: SE-XXXX
• Authors: Chris Lattner, Joe Groff

Introduction

Modern Cocoa development involves a lot of asynchronous programming using closures and completion handlers, but these APIs are hard to use. This gets particularly problematic when many asynchronous operations are used, error handling is required, or control flow between asynchronous calls gets complicated. This proposal describes a language extension to make this a lot more natural and less error prone.

This paper introduces a first class Coroutine model to Swift. Functions can opt into to being async, allowing the programmer to compose complex logic involving asynchronous operations, leaving the compiler in charge of producing the necessary closures and state machines to implement that logic.

phadej

title	author
Glassery	Oleg Grenrus

After I have improved the raw performance of optika – a JavaScript optics library, it's time to make the library (feature-)complete and sound. Gathering and classifying all possible optic types, gives us a reference point

mrkgnao

{-# LANGUAGE ApplicativeDo           #-}
{-# LANGUAGE ConstrainedClassMethods #-}
{-# LANGUAGE ConstraintKinds         #-}
{-# LANGUAGE DataKinds               #-}
{-# LANGUAGE DeriveFunctor           #-}
{-# LANGUAGE DeriveGeneric           #-}
{-# LANGUAGE FlexibleContexts        #-}
{-# LANGUAGE FlexibleInstances       #-}
{-# LANGUAGE IncoherentInstances     #-}
{-# LANGUAGE InstanceSigs            #-}