Pretty printing (was: Standard Library for text formatting?)

[Jan Kort]

Dr Mark H Phillips wrote:
> 
> Hi again,
> 
> After doing some searching, it seems that "pretty printing" is
> a prominant "Haskell way" of doing text output.  I still am
> interested in finding a library of standard text formatting
> (String formatting) functions, but it seems like it might
> be worth my while investigating pretty printing.

Pretty printing is not very suited for printf like formatting,
left/right justifying text is easy though:

  -- left/right justify the string "xs" in a fieldwidth "n".
  leftJustify n xs  = xs ++ replicate (n - length xs) ' '
  rightJustify n xs = replicate (n - length xs) ' ' ++ xs


  Jan