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