Petr

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Petr has asked 255 questions and find answers to 403 problems.

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Petr questions

How to set up a different pager and color mode in Mercurial?
How to define foldM using foldr/foldl (if it is possible)?
How to implement the inverse of "intercalate" (splitting a string into pieces on a character) using functions from "base"?
Are there monadic/applicative map (i.e. traverse/mapM) functions over ByteString or Text?
How are Scala's local lazy variables implemented?
How to interrupt asynchronous computations in Scala?
How would one create a proper polymorphic Functor instance failing on unsafeVacuous?
Slicing an IOArray (or MArray in general)
What's more costly on current CPUs: arithmetic operations or conditionals?
How to set up vim's identation for literate Haskell programming?

Petr answers

Scala Dynamics: Ability to add dynamic methods?
Performance of two alternative functions that compute least divisor
How to set up a different pager and color mode in Mercurial?
Threading extra state through a parser in Scala
Logging from within a Functional Programming Paradigm
Scala: Idiomatic way to generate a fixed length sequence (folding infinite stream?)
Multi-threading in Scala -- dealing only with immutability
Advice on writing monadic signatures
How can I write a pipe that sends downstream a list of what it receives from upstream?
Compiler fooled by mention of recursive function in non-tail position