Safe wrappers for null-partial Foldable operations.

safe-foldable

Provides defaulting and mayhap to safely wrap functions on Foldables that are partial with null data.

λ. minimum []
*** Exception: Prelude.minimum: empty list
λ. minimum [3,1,2]
1

λ. defaulting 0 minimum []
0
λ. defaulting 0 minimum [3,1,2]
1

λ. mayhap minimum []
Nothing
λ. mayhap minimum [3,1,2]
Just 1