Michael
Reputation: 42100
Either, Try, and Validation in Scala
I am confused with Either, Try, and Validation of scalaz. None of them seems to do what I need. What I need is a simple monad Result[E, R] where E is an error type and R is an result type.
Eitheris not suitable because it is not a monad (but the projections are) and unbiased.Tryis not suitable since its error type isThrowableand it is not exactly a monadValidationis not a monad at all.
What would you suggest ? Should I write this Result type by myself ?
Upvotes: 7
Views: 898
Answers (1)
Travis Brown
Reputation: 139058
If you're willing to use Scalaz (and it sounds like you are), \/ (usually pronounced "disjunction") is exactly what you're looking for—a monadic, right-biased version of Either.
It also includes lots of other nice stuff you don't get with the right projection of Either in the standard library (1.right syntax, combinators like +++, converters from Validation, etc.).
Upvotes: 8
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