Helpul Realm extensions

RealmDataExtensions.swift

extension List {
    /// Return a new array from the List elements
    func newArray() -> [T] {
        var items = [T]()
        for item in self {
            items.append(item)
        }
        
        return items
    }
    
    /// Appends the specified element only once
    /// - Returns: true if appended, otherwise false
    func appendOnce(element: T) -> Bool {
        if !contains(element) {
            append(element)
            return true
        }
        
        return false
    }
    
    /// Deletes the contents of the List from it's Realm
    func deleteContents() {
        for item in self {
            realm?.delete(item)
        }
    }
}