How do i convert String to Integer/Float in Haskell
- by Ranhiru
data GroceryItem = CartItem ItemName Price Quantity | StockItem ItemName Price Quantity
makeGroceryItem :: String -> Float -> Int -> GroceryItem
makeGroceryItem name price quantity = CartItem name price quantity
I want to create a GroceryItem when using a String or [String]
createGroceryItem :: [String] -> GroceryItem
createGroceryItem (a:b:c) = makeGroceryItem a b c
The input will be in the format ["Apple","15.00","5"] which i broke up using words function in haskell. I get this error which i think is because the makeGroceryItem accepts a Float and an Int. But how do i make b and c Float and Int respectively?
*Type error in application
*** Expression : makeGroceryItem a read b read c
*** Term : makeGroceryItem
*** Type : String -> Float -> Int -> GroceryItem
*** Does not match : a -> b -> c -> d -> e -> f*
Thanx a lot in advance :)
