Created
May 13, 2015 12:35
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import System.IO | |
import System.Directory | |
import Data.List | |
main = do | |
contents <- readFile "todo.txt" | |
let todoTasks = lines contents | |
numberedTasks = zipWith (\n line -> show n ++ " - " ++ line) | |
[0..] todoTasks | |
putStrLn "These are your TO-DO items:" | |
mapM_ putStrLn numberedTasks | |
putStrLn "Which one do you want to delete?" | |
numberString <- getLine | |
let number = read numberString | |
newTodoItems = unlines $ delete (todoTasks !! number) todoTasks | |
(tempName, tempHandle) <- openTempFile "." "temp" | |
hPutStr tempHandle newTodoItems | |
hClose tempHandle | |
removeFile "todo.txt" | |
renameFile tempName "todo.txt" |
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