Paul Johnson

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Paul Johnson has asked 20 questions and find answers to 116 problems.

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Paul Johnson questions

how to use the choosing and chosen lenses? [duplicate]
How do I use types to separate incompatible values
Continuation monad for a yield/await function in Haskell
GCR Cloud Run says "Image [name] not found"
Zipper data structure for graphical model editor
How do I use the diagrams library with GTK drawables?
Catching Haskell exceptions with gi-gtk and Reactive Banana
What is the right way to render Cairo updates in Gtk2hs?
How can I write a lens for a sum type
Why does this cause a memory leak in the Haskell Conduit library?

Paul Johnson answers

maintain state between callback function
Typeclass constraint inside typeclass instance
How to link to a local Haskell library?
FastCGI Haskell script to make use of Pandoc text conversion
What are fast algorithms/data structures for querying near points on the surface of a sphere?
Can not install GHC-Mod
Lenses, the State monad, and Maps with known keys
Aeson: derive some (but not all) fields of a struct
How can I break up a Haskell statement when the type of a parameter is not static?
haskell check for user input errors