Quoting Law <[EMAIL PROTECTED]>:
> hi, how do I define this function:
>
> tupleWithf :: [Int] -> [(Int, Int)]
>
> such that
>
> tupleWithf [x1,x2,.....,xn]
> = [ (f x1, x1), (f x2 x2),...., (f xn, xn) ]
^ you wanted a comma there, I guess.
I don't see where you're getting `f' from. I think you want the type
to be:
tupleWithf :: (Int -> Int) -> [Int] -> [(Int, Int)]
Still, you can do this with a trivial list comprehension or map. I
leave the implementation as an exercise for the reader.
--
IRISH SEA
NORTHEASTERLY BACKING WESTERLY 4, INCREASING 5 TO 7 PERHAPS GALE 8
LATER. OCCASIONAL RAIN LATER. GOOD
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