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December 14, 2015 02:19
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Example on why one should bother to learn monads/scalaz => it really cleans up real life code :-)
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| import scalaz._ | |
| val failOrBusiness: Validation[Error, Business] = for { | |
| business <- doBusiness() | |
| _ <- validateBusiness(business) // we can inspect the business here, it's like "case Right(business) =>" | |
| } yield business | |
| // instead of Either, use monadic Validation | |
| val iFeelLikeIt: Boolean = ??? | |
| def doBusiness(): Validation[Error, Business] = | |
| if (iFeelLikeIt) | |
| Business().success | |
| else | |
| Error("No business :<").fail | |
| def validateBusiness: Validation[Error, Unit] = ??? |
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