[Haskell-cafe] Newbie: Appending arrays?

[Dan Weston]

Dmitri O.Kondratiev wrote:
> I need extendable array to store and count unique vectors. I have a file 
> containing vectors presented as strings like:
> 10, 6, 80, 25, 6, 7
> 1, 2, 15, 17, 33, 22
> 21, 34, 56, 78, 91, 2
> ...
> (BTW, what is the best library function to use to convert string of 
> digits into a list or array?)

If you don't need to do error checking on the input syntax, the easiest 
(and arguably fastest) method is just read:

Prelude> let x = "10, 6, 80, 25, 6, 7"
Prelude> read ("[" ++ x ++ "]") :: [Int]
[10,6,80,25,6,7]

For error checking, you can use reads.