[Haskell-beginners] Using findIndex and then splitAt in Data.List

[Geoffrey Bays]

Hi.
An elementary question here about two functions in Data.List:
 how to use a value from findIndex which returns a Maybe Int,
and then use that result in splitAt which takes a regular Int?
This is in an IO() do

Like so: (This is in an IO() do block)

    let gradeItemIndex = findIndex (\g -> (itemName g) == (itemName
gradeItemP)) gradeItemList
    let twoListsTuple = splitAt  gradeItemIndex gradeItemList

// does not compile obviously

Many Thanks,

Geoffrey
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