之前錯誤的認知

Both Haskell and Erlang are general-purpose functional programming languages , but they also have many differences.Haskell is a lazy, statically typed, purely functional language featuring higher-order functions, polymorphism,type classes,
and monadic effects. Erlang is a strict, dynamically typed functional programming language with built-in support for concurrency, communication, distribution,and fault-tolerance. In contrast to Haskell, which arose from an academic initiative,
Erlang was developed in the Ericsson Computer Science Laboratory, and has been
actively used in industry both within Ericsson and beyond