[LANG-1456] Add Either type in tuples

• Type: New Feature
• Status: Open
• Priority: Minor
• Resolution: Unresolved
• Affects Version/s: 4.0
• Component/s: lang.tuple.*

Environment

Implementations exist in the standard library of functional languages:

• Haskell
  http://hackage.haskell.org/package/base-4.12.0.0/docs/Data-Either.html
• Scala
  https://www.scala-lang.org/api/2.9.3/scala/Either.html

• Assignee: Unassigned
• Reporter: Jan Groothuijse
• Created: 03/May/19 12:20
• Updated: 03/May/19 12:23

Description

A Pair holds left and right, an Either holds left or right. Either is the dual of Pair.

 

Either applies transformations conditionally, like optional. So that, like using optional, you do not need to check for null etc.