[Haskell-cafe] Getting the x out

[michael rice]

How do I get the x out of Just x?

Michael

=============

safeDivision :: Float -> Float -> Maybe Float 
safeDivision x y = if y == 0 then Nothing else Just (x/y)

*Main Data.List> safeDivision 10 5
Just 2.0
*Main Data.List> 3 + (safeDivision 10 5)

<interactive>:1:0:
    No instance for (Num (Maybe Float))
      arising from a use of `+' at <interactive>:1:0-22
    Possible fix: add an instance declaration for (Num (Maybe Float))
    In the expression: 3 + (safeDivision 10 5)
    In the definition of `it': it = 3 + (safeDivision 10 5)
*Main Data.List> 




      
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