Kas koodis on võimalik võrrelda Optional-tüüpi objekte?

In Swift, objects of type Optional can be compared with each other if the type they contain supports comparison. For example, if you have an Optional<Int>, you can use the == and != operators to compare them.

The comparison works as follows:

• If both values are nil, they are considered equal.
• If one is nil and the other is not, they are not equal.
• If neither is nil, their internal values are compared.

Example:

let a: Int? = 5
let b: Int? = 5
let c: Int? = nil

print(a == b) // true
print(a == c) // false
print(c == nil) // true

If the type does not support comparison, you cannot directly compare an Optional of that type.