/// <summary>Ensures set contain only elements that are present either in the current set or in the specified collection, but not both.</summary>
/// <param name="source">The current set.</param>
/// <param name="other">The collection to compare to the current set.</param>
/// <returns>A new set if there is any modification to current sealed set; otherwise, the current set.</returns>
public static IModels SymmetricExcept(this IModels source, IModels other)
{
source.VerifyNotNull(nameof(source));
other.VerifyNotNull(nameof(other));
IModels removedModelSet = Models.Empty;
foreach (var item in source)
{
if (other.Contains(item))
{
removedModelSet = removedModelSet.Add(item);
source = source.Remove(item);
}
}
foreach (var item in other)
{
if (removedModelSet.Contains(item))
{
source = source.Add(item);
}
}
return(source);
}
/// <summary>Removes the models to ensure the set contains only models both exist in this set and the specified collection.</summary>
/// <param name="source">The current set.</param>
/// <param name="other">The collection to compare to the current set.</param>
/// <returns>A new set if there is any modification to current set and current set sealed; otherwise, the current set.</returns>
public static IModels Intersect(this IModels source, IModels other)
{
source.VerifyNotNull(nameof(source));
other.VerifyNotNull(nameof(other));
foreach (var item in source)
{
if (!other.Contains(item))
{
source = source.Remove(item);
}
}
return(source);
}