On 03/08/2010, at 10:09 PM, Ertugrul Soeylemez wrote: > Tom Davies <tgdav...@gmail.com> wrote: > >> I find it convenient sometimes to convert a Maybe value to an Either >> thus (excuse the syntax, it's CAL, not Haskell): >> >> maybeToEither :: a -> Maybe b -> Either a b; >> maybeToEither errorValue = maybe (Left errorValue) (\x -> Right x); > > As a side note, this is perfectly valid Haskell code, even though it's > quite verbose. The equivalent: > > maybeToEither :: a -> Maybe b -> Either a b > maybeToEither leftValue = maybe (Left leftValue) Right
I like that better, and CAL supports that, thanks. > > Honestly I find this better than the completely points-free variants > posted in the other subthread. They demonstrate overusing points-free > style. I agree -- as an inexperienced functional programmer, but not a complete beginner, I found the points free versions incomprehensible! Tom _______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
