input-output-hk / atala-prism-building-blocks / 6379117259

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/shared/src/main/scala/io/iohk/atala/shared/utils/Traverse.scala
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package io.iohk.atala.shared.utils
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/** A lightweight DIY version of traverse to not rely on Cats because Scala3 + Cats implicits break the IDE compile










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  * server making the development counterproductive.










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  */










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object Traverse {










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  extension [A](ls: Seq[A]) {




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    def traverse[E, B](f: A => Either[E, B]): Either[E, Seq[B]] =




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      ls.foldRight[Either[E, List[B]]](Right(Nil))((i, acc) => acc.flatMap(ls => f(i).map(_ :: ls)))










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  }










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  extension [A, E](ls: Seq[Either[E, A]]) {




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    def sequence: Either[E, Seq[A]] = ls.traverse(identity)










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  }










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}
























    

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