Wed, 8 Sep 1999 18:36:14 +0900, Frank A. Christoph <[EMAIL PROTECTED]> pisze:

>   concatSep :: [a] -> [[a]] -> [a]
> 
> with semantics
> 
>   concatSep _ [] = []
>   concatSep _ [xs] = [xs]
>   concatSep sep (xs:xss) = xs ++ sep ++ concatSep sep xss

It is already defined: concat . List.intersperse

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