Convert a String list to an Int list

Question

I\'ve got a list of strings, is it possible to convert it to an list of ints?
E.g.:

[\"1\",\"2\"] -> [1,2]

Answer 1

This fails:

map read ["1","2"]
[*Exception: Prelude.read: no parse

The way to do it is :

 map (read::String->Int) ["1","2"]
 [1,2]
 :: [Int]

Outside of GHCI, in a .hs file it would be:

let intList = map (read::String->Int) ["1","2"]