public static T FirstOrDefault <T>(this HappySet <T> set, Func <T> def = null) where T : IMHappy
{
using (IEnumerator <T> e = set.GetEnumerator())
{
if (e.MoveNext())
{
return(e.Current);
}
}
return(def == null ? default(T) : def.Invoke());
}
public static T FirstOrDefault <T>(this HappySet <T> set, T def = default(T)) where T : IMHappy
{
using (IEnumerator <T> e = set.GetEnumerator())
{
if (e.MoveNext())
{
return(e.Current);
}
}
return(def);
}