[Haskell-beginners] accumenlator problem

[Nishant]

I think you wanted something like this :


toDigits :: Integer -> [Integer]
toDigits number
  | number <= 0 = []
  | number > 0 = toDigitsAcc [] number --( toDigits (number `div` 10) ) ++
[number `mod` 10]

toDigitsAcc:: [Integer] -> Integer -> [Integer]
toDigitsAcc acc number
 | number <= 0  = acc
 | number > 0 =  toDigitsAcc ((number `mod` 10) : acc) (number `div` 10)


Regards
Nishant Verma


On Wed, May 13, 2015 at 5:13 PM, Roelof Wobben <r.wobben at home.nl> wrote:

> Hello,
>
> I have this :
>
> -- | Convert a digit to a list for example 123 becomes [1,2,3]
> toDigits :: Integer -> [Integer]
> toDigits number
>   | number <= 0 = []
>   | number > 0 = toDigitsAcc [] number
>
> toDigitsAcc:: [Integer] -> [Integer] -> [Integer]
> toDigitsAcc acc number
>   | number <= 0  = acc
>   | number > 0 = (number `mod` 10) : acc toDigitsAcc (number `div` 10)
>
> bur there are error on both last lines of he functions.
>
> Any tips how to solve this ?
>
> Roelof
>
>
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-- 
Nishant
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