Re: [Haskell-beginners] How to extract from Maybe & Either in GHCi

On Wed, Apr 13, 2011 at 5:14 PM, wrote:

I've got some values in GHCi that look like

Just (Left (Blah [stuff]))

and I'd like to pull out the (Blah [stuff]) to operate on it.  Is there a way to do this directly in GHCi without writing a helper function?

Pattern matching works in ghci:

let x = Just (Left (Blah [stuff])) let (Just (Left (Blah y)) = x

Antoine

thanks Lee Short

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