[Haskell-beginners] Use a list as data for a data type?

[Brent Yorgey]

On Fri, Feb 22, 2013 at 10:43:32AM -0800, Bryce Verdier wrote:
> Lets say I have a data type like so:
> 
> data IpAddress = IpAddress {$
>          o1 :: !Int,$
>          o2 :: !Int,$
>          o3 :: !Int,$
>          o4 :: !Int$
>      } deriving (Show)$
> 
> which you can create by doing:
> IpAddress 192 168 1 1
> 
> Is there a way to do the same thing with the input data in a list? Like:
> IpAddress [192,168,1,1]
> 
> or using some operator (or combination of operators):Like (I'm
> guessing (<????>) isn't in use):
> IpAddress <????> [192,168,1,1]

No, there isn't.  But you can make a function

  ipAddress :: [Int] -> IpAddress
  ipAddress [a,b,c,d] = IpAddress a b c d

-Brent