2010/5/27 Ionut G. Stan <ionut.g.s...@gmail.com>: > Hi, > > I was just wondering if there's any particular reason for which the two > constructors of the Either data type are named Left and Right. I'm thinking > that something like Success | Failure or Right | Wrong would have been a > little better. > > I've recently seen that Scala uses a similar convention for some error > notifications so I'm starting to believe there's more background behind it > than just an unfortunate naming.
Hi, Either *can* be used to represent success and failures, but not necessarily. It is a convention, when using Either to model success/failure, to use Right for success and Left for failure. Even if Left as a word does not match with the meaning of failure, it is easy to get it Right :) Cheers, Thu _______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
