class EitherSemigroup[L, R] extends Semigroup[Either[L, R]]
Either semigroup is useful for error handling. if everything is correct, use Right (it's right, get it?), if something goes wrong, use Left. plus does the normal thing for plus(Right, Right), or plus(Left, Left), but if exactly one is Left, we return that value (to keep the error condition). Typically, the left value will be a string representing the errors.
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final
def
!=(arg0: Any): Boolean
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final
def
##(): Int
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final
def
==(arg0: Any): Boolean
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def
additive: algebra.Semigroup[Either[L, R]]
- Definition Classes
- Semigroup → AdditiveSemigroup
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final
def
asInstanceOf[T0]: T0
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def
clone(): AnyRef
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def
combine(l: Either[L, R], r: Either[L, R]): Either[L, R]
- Definition Classes
- Semigroup → Semigroup
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def
combineAllOption(iter: TraversableOnce[Either[L, R]]): Option[Either[L, R]]
- Definition Classes
- Semigroup → Semigroup
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def
combineN(a: Either[L, R], n: Int): Either[L, R]
- Definition Classes
- Semigroup
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final
def
eq(arg0: AnyRef): Boolean
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def
equals(arg0: Any): Boolean
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def
finalize(): Unit
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final
def
getClass(): Class[_]
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def
hashCode(): Int
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final
def
isInstanceOf[T0]: Boolean
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final
def
ne(arg0: AnyRef): Boolean
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final
def
notify(): Unit
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final
def
notifyAll(): Unit
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def
plus(l: Either[L, R], r: Either[L, R]): Either[L, R]
- Definition Classes
- EitherSemigroup → AdditiveSemigroup
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def
positiveSumN(a: Either[L, R], n: Int): Either[L, R]
- Attributes
- protected[this]
- Definition Classes
- AdditiveSemigroup
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def
repeatedCombineN(a: Either[L, R], n: Int): Either[L, R]
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- protected[this]
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- Semigroup
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def
sumN(a: Either[L, R], n: Int): Either[L, R]
- Definition Classes
- AdditiveSemigroup
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def
sumOption(iter: TraversableOnce[Either[L, R]]): Option[Either[L, R]]
Returns an instance of
Tcalculated by summing all instances initerin one pass.Returns an instance of
Tcalculated by summing all instances initerin one pass. ReturnsNoneifiteris empty, elseSome[T].- iter
instances of
Tto be combined- returns
Noneifiteris empty, else an option value containing the summedT
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final
def
synchronized[T0](arg0: ⇒ T0): T0
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def
toString(): String
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def
trySum(iter: TraversableOnce[Either[L, R]]): Option[Either[L, R]]
- Definition Classes
- Semigroup → AdditiveSemigroup
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final
def
wait(): Unit
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final
def
wait(arg0: Long, arg1: Int): Unit
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final
def
wait(arg0: Long): Unit
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