/// <summary>
/// Returns the current set without periods in the specified set.
/// </summary>
public PeriodSet ExceptWith(PeriodSet other)
{
var result = new PeriodSet();
foreach (Period item in this)
{
result.Add(item.From, +1);
result.Add(item.To, -1);
}
foreach (Period item in other)
{
result.Add(item.From, -1);
result.Add(item.To, +1);
}
result.Normalize();
return(result);
}
/// <summary>
/// Returns a set with all periods that are present in both the current set and in the specified collection.
/// </summary>
public PeriodSet UnionWith(PeriodSet other)
{
return(new PeriodSet(this.Concat(other)));
}
/// <summary>
/// Returns a set that contains only periods that are present either in the current set or in the specified set, but not both.
/// </summary>
public PeriodSet SymmetricExceptWith(PeriodSet other)
{
return(ExceptWith(other).UnionWith(other.ExceptWith(this)));
}
/// <summary>
/// Returns a set that only contains periods that exist in the current set and the specified set.
/// </summary>
public PeriodSet IntersectWith(PeriodSet other)
{
return(UnionWith(other).SymmetricExceptWith(SymmetricExceptWith(other)));
}