Add fmap built-in

fmap would look like:

def fmap(func, obj) =
    obj |> map$(func) |*> obj.__class__

[evhub]

@Sitwon Yep, that’s exactly it! There was a discussion on Gitter that this stems from about adding more FP-style tools to Coconut. The rationale is that if you added a function like the above, it would make it a lot easier to do this:

>>> data Nothing()
>>> data Just(n)
>>> Just(3) |> map$(-> _*2) |*> Just
Just(n=6)
>>> Nothing() |> map$(-> _*2) |*> Nothing
Nothing()

[hasufell]

Huh. What package manager are you using? Are you not installing Coconut through pip?

No, I’m using paludis under exherbo. I’ve packaged coconut manually.

Try it now!

Yes, works now!