Andreas Fuertig writes:
> fillArray ["a"]
> should be something like this:
> [[("a",True)],[("a",False)]]
A pretty generic solution using the "Bounded" and "Enum"
type classes to calculate the list of all values for a given
type would be:
enumAll :: (Bounded a, Enum a) => [a]
enumAll = [ minBound .. maxBound ]
fillArray :: (Bounded b, Enum b) => [a] -> [(a,b)]
fillArray xs = [ (x,y) | x <- xs, y <- enumAll ]
In GHCi, you can use these functions like this:
| *Main> enumAll :: [Bool]
| [False,True]
|
| *Main> fillArray "abc" :: [(Char, Bool)]
| [('a',False),('a',True),('b',False),('b',True),('c',False),('c',True)]
Peter
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