[Haskell-cafe] do we have something like isDefined or isNull in Haskell?

[Duncan Coutts]

On Thu, 2006-06-15 at 13:11 +0100, Duncan Coutts wrote:

> then you can construct your records using:
> 
> foo = default { weight = 3.2 }

Oops, as David House pointed out to me that should of course be

foo = default { weight = Just 3.2 }


Duncan