Top "Either" questions

Getting Value of Either

Besides using match, is there an Option-like way to getOrElse the actual content of the Right or Left value? scala&…

scala either

Using Either to process failures in Scala code

Option monad is a great expressive way to deal with something-or-nothing things in Scala. But what if one needs to …

scala functional-programming either

Scala Either map Right or return Left

Is it possible to handle Either in similar way to Option? In Option, I have a getOrElse function, in Either …

scala either

Convert Option to Either in Scala

Suppose I need to convert Option[Int] to Either[String, Int] in Scala. I'd like to do it like this: …

scala type-conversion option either

Throwing exceptions in Scala, what is the "official rule"

I'm following the Scala course on Coursera. I've started to read the Scala book of Odersky as well. What I …

scala exception try-catch either

Using Eithers with Scala "for" syntax

As I understand it, Scala "for" syntax is extremely similar to Haskell's monadic "do" syntax. In Scala, "for" syntax is …

scala monads typeclass for-comprehension either

how do I process returned Either

if a scala function is def A(): Either[Exception, ArrayBuffer[Int]] = { ... } what should be the right way to process the …

scala either

Best way to turn a Lists of Eithers into an Either of Lists?

I have some code like the below, where I have a list of Eithers, and I want to turn it …

scala either

How to extract Left or Right easily from Either type in Dart (Dartz)

I am looking to extract a value easily from a method that return a type Either<Exception, Object>. …

unit-testing flutter dart either

How map only left value from scala Either?

Consider a code: val some: OneCaseClass Either TwoCaseClass = ??? val r = some.left.map(_.toString) Why is r Serializable with Product …

scala either