How to save dinamically array in core data or realm in iOS And how to compare this array

Question

I have an array

var names:[String]=["kate","son","viktor"]

I want to save this array in core data or Realm. This array dynamically changed

var names:[String]=["kate","son","viktor","sam"]

How to compare this arrays and print changes. For example: changes for names "Sam". Thanks for any help(idea) or links.

Answer 1

In Realm, you could simply serialize/deserialize the array to Data (or String), like this:

class SomeModel: Object {
    dynamic var _names: Data!

    var names: [String] {
        set(value) {
            try! realm.write {
                _properties = try! JSONSerialization.data(withJSONObject: value, options: [])
            }
        }
        get {
            guard _names != nil else { return [] }
            return try! JSONSerialization.jsonObject(with: _names, options: []) as? [String] ?? []
        }
    }
}

This will store your array in Realm, but will not allow you to sort or query using the names in the array, obviously.

You probably better store each name in a proper model object and create a one-to-many property in the base object (using Realm's List)