Often, Either is used to represent, exclusively, a value or a failure, in a more detailed way than Maybe can. For example, a function like `parse` ( http://hackage.haskell.org/packages/archive/parsec/latest/doc/html/Text-Parsec-Prim.html#v:parse), which is part of Parsec, might have a type like:
parse :: [...] s -> Either<http://hackage.haskell.org/packages/archive/base/4.5.0.0/doc/html/Data-Either.html#t:Either> ParseError<http://hackage.haskell.org/packages/archive/parsec/latest/doc/html/Text-Parsec-Error.html#t:ParseError> a Meaning, parsing will either fail with a Left ParseError, or succeed with a Right a, where a is whatever type your parser returns. Hope that helps, Alvaro On Wed, Feb 6, 2013 at 9:37 PM, Jacob Thomas <jthom...@ucsc.edu> wrote: > > Hello > > I'm new to Haskell, and need help with figuring out the Either type... > Any example to show how this works? > > Jacob > > > _______________________________________________ > Haskell-Cafe mailing list > Haskell-Cafe@haskell.org > http://www.haskell.org/mailman/listinfo/haskell-cafe > >
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