λ
mapN
синтаксис, я может начну использовать хахаSize: a a a
a
mapN
синтаксис, я может начну использовать хахаa
a
a
mapN
и NonEmptyList
из котовS
S
mapN
и NonEmptyList
из котовS
a
/** Standard combinator "traverse" ({{{ G[A] => (A => F[B]) => F[G[B]] }}})
* specialized to [[scala.collection.immutable.List]] and `Validate` monoid.
*/
def validate[E, A, B](it: immutable.Iterable[A])(f: A => Either[E, B]): Either[NonEmptyList[E], List[B]]
a
validate(ctx.parameters.toList) { param => ... }
a
a
a
ValidationNel
не имею, конечноOℕ
Take functional programming's "algebraic reasoning" with a grain of salt: the monad laws, for example, only ensure you can reason about your imperative DSL like a C programmer reasons about statements.
VE
IT
λ
D
IT
λ