These are from algebra.
Returns an instance of Either[L, R]
calculated by summing all instances in
iter
in one pass.
Returns an instance of Either[L, R]
calculated by summing all instances in
iter
in one pass. Returns None
if iter
is empty, else
Some[Either[L, R]]
.
instances of Either[L, R]
to be combined
None
if iter
is empty, else an option value containing the summed Either[L, R]