Existential types are types that provide a collection of operations that act on an unspecified, or abstract, type.
I read through the Wikipedia article Existential types. I gathered that they're called existential types because of the existential operator (∃). …
language-agnostic types type-systems existential-typeWhat is the different between the following Generics definitions in Scala: class Foo[T <: List[_]] and class Bar[T &…
scala generics covariance any existential-typeI was playing around in the Scala REPL when I got error: unbound wildcard type. I tried to declare this (…
scala types existential-type unbounded-wildcardWhat exactly is the difference between these? I think I understand how existential types work, they are like having a …
haskell polymorphism existential-type