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Foldable

funstruct.typeclasses.foldable

Foldable — reduce a structure to a single value.

fold_left: (B, A → B) → F[A] → B fold_right: (A, B → B) → F[A] → B

Foldable

Bases: BaseTypeclass

fold_left + fold_right.

Source code in funstruct/typeclasses/foldable.py 
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class Foldable(BaseTypeclass):
    """fold_left + fold_right."""

    @abstractmethod
    def fold_left(self, fa, acc, f: Callable) -> object: ...

    @abstractmethod
    def fold_right(self, fa, acc, f: Callable) -> object: ...