Right.to_some crached with argument error about dry-monads

[fuadsaud]

Does it make sense to have a "general" implementation of to_maybe for Either? I see haskell implements leftToMaybe and rightToMaybe, which behave a little differently:

http://hackage.haskell.org/package/either-4.3.3.2/docs/Data-Either-Combinators.html#v:leftToMaybe

[flash-gordon]

Either#to_maybe is equivalent (with minor nil exception) to rightToMaybe. We don't have an analog of leftToMaybe because this means adding one more method to Either class and we want to keep it concise. We could add a module with combinators for this implemented as class-level methods

class Either
  module Combinators
    def self.left_to_maybe(either)
      # ...
    end
  end
  C = Combinators
end

Either.C.left_to_maybe

Rather verbose, but afraid it's best we can have in ruby

[fuadsaud]

@flash-gordon interesting. That could be implemented with refinements as well, in order to keep it more ruby-ish (even though a separate module would keep things even simpler and I like simple), but I definitely understand your point. I'm gonna get a pr to fix this issue since #26 looks stale.

[flash-gordon]

OK, this fixed in master