Associative operation taking which combines two values.
Associative operation taking which combines two values.
Given a sequence of as
, combine them and return the total.
Given a sequence of as
, combine them and return the total.
If the sequence is empty, returns None. Otherwise, returns Some(total).
Return a
combined with itself n
times.
Return a
combined with itself n
times.
Return a
combined with itself more than once.
Return a
combined with itself more than once.
CommutativeSemigroup represents a commutative semigroup.
A semigroup is commutative if for all x and y, x |+| y === y |+| x.