How to reach the classa element subscribed to the sub protocol?

Question

Swift

Please tell me how to do it right so that I can reach out to expired) Newbie don't kick Sin, thanks)!

Answer 1

var fridge = [Storable]() // empty array of type Storable fridge
for prod in basket {
if let storableProduct = prod as? Storable where storableProduct.expired == false {
fridge.append(storableProduct)
}
Might be useful to someone

Answer 2

In Swift 3, the syntax for multiple conditions in a single if let has changed:

if let storableProduct = prod as? Storable, storableProduct.expired == false {
    fridge.append(storableProduct)
}

At the same time, where is still used in for, while, switch.