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New Post: Working with Haskell CallStack
I’ve improved our exception reporting experience significantly at Mercury. As a result, I know quite a bit about `HasCallStack`, a weird and magical…
May 11
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Matt Parsons
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New Post: Working with Haskell CallStack
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February 2023
Production Haskell v1.0 Released
Now with hard copies!
Feb 2
•
Matt Parsons
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Production Haskell v1.0 Released
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November 2022
reserving the name
wow i would actually really like to switch from GitHub Pages for my programming stuff, but Substack doesn’t let you use markdown? absolutely not what…
Nov 17, 2022
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Matt Parsons
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reserving the name
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Coming soon
This is Overcoming Software, a newsletter about thoughts on Haskell and other software concerns.
Nov 17, 2022
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Matt Parsons
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Coming soon
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Break Gently with Pattern Synonyms
This is a really brief post to call out a nice trick for providing users a nice migration message when you delete a constructor in a sum type. The…
Nov 2, 2022
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Matt Parsons
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Break Gently with Pattern Synonyms
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October 2022
Spooky Masks and Async Exceptions
Everyone loves Haskell because it makes concurrent programming so easy! forkIO is great, and you’ve got STM and MVar and other fun tools that are…
Oct 29, 2022
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Matt Parsons
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Spooky Masks and Async Exceptions
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Femoroacetabular Impingement
Apparently, I’ve spent my entire life with a condition called “femoracetabular impingement.” The bones in my hips are deformed - the femoral neck is too…
Oct 7, 2022
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Matt Parsons
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Femoroacetabular Impingement
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August 2022
Dynamic Exception Reporting in Haskell
Exceptions kind of suck in Haskell. You don’t get a stack trace. They don’t show up in the types of functions. They incorporate a subtyping mechanism…
Aug 16, 2022
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Matt Parsons
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Dynamic Exception Reporting in Haskell
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May 2022
Moving the Programming Blog
I’m moving the programming stuff over to https://overcoming.software. Well, I will at some point in the future. But I don’t want to break links. So I…
May 3, 2022
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Matt Parsons
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Moving the Programming Blog
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November 2021
RankNTypes via Lambda Calculus
RankNTypes is a language extension in Haskell that allows you to write even more polymorphic programs. The most basic explanation is that it allows the…
Nov 30, 2021
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Matt Parsons
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RankNTypes via Lambda Calculus
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September 2021
Deferred Derivation
justifiably lazy orphans (alternative subtitle: “I used the TemplateHaskell to destroy the TemplateHaskell”) (EDIT: 2021-11-05 - Having actually tried…
Sep 9, 2021
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Matt Parsons
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Deferred Derivation
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Family Values
I wrote a big thread on the company Slack to compare type families: open vs closed vs associated. I also ended up discussing data families, as well…
Sep 2, 2021
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Matt Parsons
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Family Values
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