未使用传递到 Swift 闭包的参数

Question

I can't understand why Pizza is returned instead of Tomato here, even when calling for Tomato:

var foodArray = ["Pizza", "Tomato"]
var food = {
    (name: String) -> String in
    for item in foodArray {
        if item == "Pizza" {
            return "eating \(foodArray[0]) everyday could be bad for your health."
        } else if item == "Tomato" {
            return "\(foodArray[1]) is good for your health."
        }
    }
    return "the food you entered is not valid."
}

food("Tomato")

Answer 1

You're iterating through foodArray and the first item is "Pizza" so it will always return the statement about pizza. You do not make use of the string that is passed into the closure, which is called "name." Remove the for loop and replace:

if item == "Pizza"
...
else if item == "Tomato"

with:

if name == "Pizza"
...
else if name == "Tomato"