10 Jun
2011
10 Jun
'11
7:49 p.m.
On Thu, Jun 9, 2011 at 11:31 AM, Max Bolingbroke <batterseapower@hotmail.com
wrote:
If you want plain text serialization, "writeFile "output.txt" . show" and "fmap read (readFile "output.txt")" should suffice...
Max
This code works: main = do let xss = [[1,2,3],[4,5,6],[7,8],[9]] writeFile "output.txt" (show xss) line <- readFile "output.txt" let xss2 = read line :: [[Int]] print xss2 As soon as complete file is returned as a single line, using 'fmap' does not make sense here: line <- readFile "output.txt" let xss2 = fmap read line When to use 'fmap'?