Combines all validation values from an array of them.
forall a, b: (Array (Validation a b)) => Validation a b
where a is SemigroupCombines all validation values from an array of them.
The function is a convenient way of concatening validations one by one, and will concatenate failures together, but will only maintain the last successful value if they are all successful.
const { Success, Failure, collect } = require('folktale/validation');
collect([
Success('a'),
Success('b'),
Success('c')
]);
// ==> Success('c')
collect([
Failure('a'),
Success('b'),
Failure('c')
]);
// ==> Failure('ac')
collect([
Failure('a'),
Failure('b'),
Failure('c')
]);
// ==> Failure('abc')
(validations) =>
validations.reduce((a, b) => a.concat(b), Success())