Given a function like negate, it has the type signature: negate :: Num a => a -> a which I would describe as a being the type in the context of Num (correct me if you think I am wrong). But ...

I wonder if someone is familiar with the Prelude´s read function in Haskell. The type of this function is following. Read a => String -> a Can someone explain me with a few examples how this...

I look for something equivalent to what we can have in Python doing this:: >>> print([func for func in dir(__builtins__) if func[0].islower()]) ['abs', 'all', 'any', 'ascii', 'bin', 'bool'...

If you want to fold a list, I see four ways to do it. Fold from the right of the list, with the recursive term on the right foldrr (-) 100 [1..10] = 1 - (2 - (3 - (4 - (5 - (6 - (7 - (8 - (9 -...

I was reading the Haskell Prelude and finding it pretty understandable, then I stumbled upon the exponention definition: (^)              :: (Num a, Integral b) => a -> b -> a x ^ 0      ...

I am searching for a function which looks something similar to this: withSelf :: (a -> b) -> a -> (a, b) withSelf f x = (x, f x) I have searched with Hoogle for such a function; I searc...

I know $ :: (a->b) -> a -> b f $ x = f x Intuitively it seems to me, like to say, 1. $ delays the evaluation of the function to its left 2. evaluates whats to its right 3. feeds...

Is there a way to view a list of Prelude functions (such as Data.Char) from the Haskell console, instead of visiting Hoogle?

In one file I need to use the regular prelude (++) operator and I also wish to implement my own behaviour for (++). I have used import Prelude hiding (++) at the top of my file, defined my own (++)...