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How to combine and then branch in MonadPlus/Alternative

score 830 · Answer 1 · 2022-01-24T21:29:39.977000

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How to combine and then branch in MonadPlus/Alternative

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TechQA.

List Question

How to combine and then branch in MonadPlus/Alternative

Obtaining a Bool out of [Maybe Bool] which is guaranteed to contain at least one Just

Using Logic monad to backtrack upon exception thrown with ExceptT

An alternative Alternative for lists

MonadPlus IO isn't a monoid

What is the default type evaluation of MonadPlus in Haskell?

Why `guard` is not defined with a MonadPlus constraint?

Haskell function which acts differently depending on the monad type

Non-Deterministic Merge Sort Doesn't Order Permutations Lexicographically

Is there a name for "maybe mzero return"?

Why do safe partial functions use Maybe instead of generalizing to any Monad

Haskell parser, Monad and MonadPlus

How to encode actions that take monadic arguments with free (or freer) monads?

Is there a Codensity MonadPlus that asymptotically optimizes a sequence of MonadPlus operations?

What was wrong with Control.MonadPlus.Free?

What can we do with Alternative but cannot do with Monoid?

Flatten MonadPlus inside an Aeson Parser

How does mzero match guard type signature?

Trouble understanding error handling with monads

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