Petr

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Petr has asked 260 questions and find answers to 410 problems.

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Petr questions

Is there a trait for "update", similar to Function1 for apply?
Why doesn't Scala's implicit class work when one of the type parameters should be Nothing?
How to make a tail-recursive method that can also refer to itself in a non-tail-recursive way
What type is used by std::allocate_shared to allocate memory?
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?

Petr answers

How do you `get` the current state from a a state monad that is part of a product monad?
How can I duplicate a git-svn cloned repository, so that git svn dcommit still works
How to make a tail-recursive method that can also refer to itself in a non-tail-recursive way
Loading Network.HTTP module in Haskell on GHC7.4.1
Parsing "SQL like" query strings
ERROR! unexpected parameter type in action: <class 'ansible.parsing.yaml.objects.AnsibleSequence'>
How to wait on multiple `MVar`s?
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?