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New posts in haskell

How to contramap over functions?

haskell contravariance

Options.Applicative, (<>) and the Monoid type class

haskell

Is it possible to declare a typeclass instance for a type alias?

haskell

Skip the remaining actions in a monad - like return

haskell monads monad-transformers

Functor type variables for Flip data type

haskell arguments functor newtype

Haskell Declare empty list, but which is actually not empty?

list haskell filter pattern-matching lazy-evaluation

Why is Int not promotable?

haskell ghc

Haskell instance read for newtype that is just an int

haskell newtype deriving

How to "iterate" over a function whose type changes among iteration but the formal definition is the same

haskell iteration

Cut inner lists to equal length in Haskell

list haskell

Polymorphic lens without template haskell

haskell polymorphism haskell-lens

Code compiles in Elm but not in Haskell

haskell matrix functional-programming transpose elm

What makes two type expressions in Haskell equivalent?

haskell types equivalence

Haskell Decimal to Binary

haskell binary decimal

Pattern matching on the last element of a List

haskell pattern-matching

Understanding the map function when the first argument uses flip

haskell functional-programming higher-order-functions

Why does the type match on the next line but not on the same line in `do` block?

haskell io monads io-monad do-notation

I think I found a "non-existent monad"

haskell default monads ghci

The type Tree should be an instance of the typeclass Eq

haskell

What is the idiomatic Haskell-way to act on predicates in IO?

haskell conditional-statements predicate io-monad
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