10 Jun
2011
10 Jun
'11
7:49 a.m.
On Thu, Jun 9, 2011 at 11:31 AM, Max Bolingbroke 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'?