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Questions - vavr

Problem with Either and errors types incompatibility

I have a problem with Either errors types incompatibility. A method to create Account entity: static Either<AccountError,Account> create( String userNameCandidate, UserNameUniquenessValidator us...
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Sampeteq

java

functional-programming

either

vavr

Votes: 0

Answers: 2

Latest Answer

The issue is that Either<WrongUserNameFormat, ...> does not extend Either<AccountError, ...> even though WrongUserNameFormat may extend AccountError. This is because Java does not have goo...
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DBear

Validating an object with a long list of predicates

I have an object, Bill, with a number of fields. In the method below, I get the bill with a function. I want to validate it with a list of Predicate<Bill>, which are paired with the appropriate ...
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FaraBara

java

validation

vavr

Votes: 0

Answers: 1

Latest Answer

I would do a nested combine and then flatten the results. In our project we always have Seq<ValidationError> on the left side of a Validation, you don't have to but it is good to understand the ...
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jvwilge

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