[Haskell-cafe] newbie "concatenating" monad question

Leandro Penz lpenz at terra.com.br
Sat Mar 24 15:09:13 EDT 2007


I'm new here and this is my first mail to the list, so be gentle :)

I have some functions that build big strings by calling other functions and
appending the result, like

buildStuff =
  func1 ++ func2 ++ func3 ++ func4

My idea is to have a monad with a concatenating >>, so that I can:

bulidStuff = do

I am thinking about using the writer monad, but I would still have to use
"tell". The list monad is not an option either, as it does not concatenate.

Is there a proper way of doing something like this (efficiently) ?

Leandro Penz
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