Issue 285 2021-10-14
Welcome to another issue of Haskell Weekly! Haskell is a safe, purely functional programming language with a fast, concurrent runtime. This is a weekly summary of what’s going on in its community.
GHC activities report: August – September 2021 by Well-Typed
This is the eighth edition of our GHC activities report where we describe the work on GHC and related projects that we are doing at Well-Typed. The current edition covers roughly the months of August and September 2021.
How to protect aeson code from hash flooding by Fraser Tweedale
aesonrelease addresses the hash flooding issue, but you need more than a version bump to ensure your programs are protected. This post outlines how
aesonaddressed the vulnerability and what action you need to take.
This blog post will introduce a way to use prism-like functions to express such complex pattern-matching-based evaluation rules.
Testing Polysemy With polysemy-check by Sandy Maguire
By forcing yourself to think about effects, you are forced to pull concerns apart, and use the type-system to document what’s going on. But more importantly for today, it gives us a layer of indirection inside of which we can insert testing machinery.
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Book of Monads by Alejandro Serrano Mena
This book provides a journey from the very first concepts, to the myriad of monads available to programmers, down to the categorical foundations.
Rah-Rah Haskell posts in 2021? You betcha.
Why Haskell? by Monday Morning Haskell
When I tell other programmers I do a lot of programming in Haskell, a common question is “Why”?
Show & tell
aeson version 18.104.22.168 by Oleg Grenrus
Make map type used by Object abstract so the underlying implementation can be modified, thanks to Callan McGill.
Cabal version 22.214.171.124 by Emily Pillmore
The Cabal team is excited to announce the release of
linear-generics by David Feuer
This package offers a version of GHC.Generics with two important improvements: The
from1methods have multiplicity-polymorphic types, allowing them to be used with either traditional Haskell code or linearly typed code; and the representations used for
Generic1are modified slightly.