Miks Swiftis on kogud väärtusetüübid?

In Swift, collections are implemented as Value Types to ensure code safety and predictability. Value types are copied when assigned or passed to a function, preventing unintentional data modifications from different parts of the program.

Advantages of this approach:

• Data isolation: changes in one copy do not affect others.
• Thread safety: no need for synchronization when working with collections in different threads.
• Ease of understanding: copying behavior is more transparent than references.

For example, if you pass an array to a function and modify it there, the original array remains unchanged if you use a value type.

var array1 = [1, 2, 3]
var array2 = array1 // a copy is created
array2.append(4)
print(array1) // [1, 2, 3]
print(array2) // [1, 2, 3, 4]

This helps prevent errors related to data changes in unexpected places.