public static T Last <T>(this IRandomAccessSet <T> self)
{
if (!self.Any())
{
throw new InvalidOperationException("Sequence contains no elements");
}
return(self[self.Count - 1]);
}
public static T LastOrDefault <T>(this IRandomAccessSet <T> self)
{
if (!self.Any())
{
return(default(T));
}
return(self[self.Count - 1]);
}
public static T FirstOrDefault <T>(this IRandomAccessSet <T> self)
{
if (!self.Any())
{
return(default(T));
}
return(self[0]);
}
public static bool Any <T>(this IRandomAccessSet <T> self)
{
return(self.Count != 0);
}
