[Haskell-cafe] Selda, type operators and heterogeneous lists

Marc Busqué marc at lamarciana.com
Fri Apr 13 14:38:46 UTC 2018

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 

Marc Busqué

More information about the Haskell-Cafe mailing list