public static VersionedList <T> UpsertWhere <T>(this VersionedList <T> source, Func <T, bool> predicate, T item)
{
var index = source.IndexOf(predicate);
if (index < 0)
{
return(source.Add(item));
}
return(source.SetItem(index, item));
}
public static VersionedList <T> ToVersionedList <T>(this IEnumerable <T> source)
{
return(VersionedList <T> .Create(source));
}
public static VersionedList <T> Upsert <T>(this VersionedList <T> source, T item)
{
return(source.Upsert(t => t, item));
}
public static VersionedList <T> Upsert <T, K>(this VersionedList <T> source, Func <T, K> trackBy, T item)
{
var key = trackBy(item);
return(source.UpsertWhere(t => Equals(trackBy(t), key), item));
}
