TL/DR: Haskell makes you add more meta information to the code, so that compilers can reason about it.
One of the examples in the article:
Python:
def do_something():
result = get_result()
if result != "a result":
raise InvalidResultError(result)
return 42
Haskell:
doSomething :: Either InvalidResultError Int
doSomething =
let result = getResult
in if result /= "a result"
then Left (InvalidResultError result)
else Right 42
Personally, I prefer the Python version. In my experience, the benefits of adding meta information like types and possible return values are very small. Because the vast majority of time fixing problems in software development is spent on systematic bugs and issues, not on dealing with type errors.
One of the examples in the article:
Python:
Haskell: Personally, I prefer the Python version. In my experience, the benefits of adding meta information like types and possible return values are very small. Because the vast majority of time fixing problems in software development is spent on systematic bugs and issues, not on dealing with type errors.