public VersionedList <T> Add(T item)
{
return(new VersionedList <T>(
Items.Add(item),
Version + 1,
Changes.Add(ListChange.Added(Version, Items.Count, item))));
}
public VersionedList <T> Insert(int index, T item)
{
return(new VersionedList <T>(
Items.Insert(index, item),
Version + 1,
Changes.Add(ListChange.Added(Version, index, item))));
}
public VersionedList <T> AddRange(IEnumerable <T> items)
{
var itemsToAdd = items.ToArray();
var changes = Enumerable.Range(0, itemsToAdd.Length)
.Select(i => ListChange.Added(Version + i, Items.Count + i, itemsToAdd[i]));
return(new VersionedList <T>(
Items.AddRange(items),
Version + itemsToAdd.Length,
Changes.AddRange(changes)
));
}
