On Sat, Oct 21, 2006 at 03:29:57PM +0200, Josef Svenningsson wrote:
Hi,
I'd like to propose to include the following function in Data.List: join :: [a] -> [[a]] -> [a] join x xs = concat (intersperse x xs)
I find that every time I use intersperse I also concat the result. And it seems that I'm not alone: http://www.google.com/codesearch?q=file%3A%5C.hs+intersperse&btnG=Search+Code A clear majority of all the uses of intersperse also use concat on the result. I think it seems worthwhile to give a name to that idiom.
The name 'join' was taken from Data.ByteString, where a similar function exists.
All the best,
I have that same function in my standard toolbox, but call it concatInter a la concatMap. though mconcatInter would probably be better, since then we can do it for an arbitrary monoid. John -- John Meacham - ⑆repetae.net⑆john⑈