Haskell List of tuples to list?

Question

Is it possible to convert a list of tuples [(Int,Int)] as a generic way which valid to any input size ? .. i saw in various questions thats its not possible gen

Answer 1

This can be also achieved by the homogeneous tuples library (disclaimer: which I'm the author of). It defines wrappers for tuples that make them instances of Traversable (and others such as Applicative and Monad). So a tuple can be converted to a list by toList . Tuple2 (where toList is from Data.Foldable) and

f :: [(a, a)] -> [a]
f = concatMap (toList . Tuple2)

You can also use it for other tuples, for example concatMap (toList . Tuple5) etc.