Am 13.04.2018 um 16:38 schrieb Marc Busqué:
On Fri, 13 Apr 2018, Tom Ellis wrote:
On Fri, Apr 13, 2018 at 03:59:44PM +0200, Marc Busqué wrote:
Before we can help we need to know more. Specifically, why do you want to put them in a single list?
I want to make the same action with more than one (creating them in the database server):
``` migrate :: IO () migrate = do dir <- dBDir createDirectoryIfMissing True dir forM_ [categories, expenses] $ withDB . createTable ```
So a possible solution is to store a list of actions instead of a list of items (untested code): let dbCreateTable = withDB . createTable sequence_ $ map dbCreateTable categories ++ map dbCreateTable expenses or perhaps, if the types allow it: withDB $ do let dbCreateTable = withDB . createTable sequence_ $ map createTable categories ++ map createTable expenses