ArrowKt Try alternative for eager execution

Question

ArrowKt has deprecated Try since it promotes eager execution of effects and it recommends to use suspend constructors. But how should I handle following case where I do want eager execution on purpose without using traditional try-catch.

 fun getMainAccount(accounts: List<String>): Either<Exception, String> {  
   return Try {
     accounts.single()
   }.toEither().mapLeft {
     InvalidAccountError()
   }
 }

Answer 1

There is no need for any special construct beside try/catch in Kotlin, since it's also already an expression. For that reason it was removed from Arrow, you can simply write:

fun getMainAccount(accounts: List<String>): Either<Exception, String> =  
   try {
     Right(accounts.single())
   } catch(e: Exception) {
     Left(InvalidAccountError())
   }

Or you can also easily write a utility function for it yourself.

fun <A> Try(f: () -> A, fe: ): Either<Exception, A> = 
   try {
     Right(f())
   } catch(e: Exception) {
      Left(e)
   }

fun getMainAccount(accounts: List<String>): Either<Exception, String> =
   Try { accounts.single() }.mapLeft { InvalidAccountError() }