[carterschonwald]

i write incredibly mutation heavy code in haskell on a nearly daily basis. I've even added compiler support for doing hardware prefetch to the most recent version of ghc https://downloads.haskell.org/~ghc/7.10.1/docs/html/librarie...

there are many lovely mutable data structuers in haskell http://hackage.haskell.org/package/vector-0.5/docs/Data-Vect... is one for unboxed C-struct style arrays,

http://hackage.haskell.org/package/hashtables is a super mature stable mutable hashtable library, that is used, among other places, in agda!

..... please fact check your feelings in the future :)

[QuantumRoar]

Sorry. I seriously didn't know. I only ever used the immutable parts of Haskell. Thanks for the correction.