public static FormulaPiece[] Remove(int index, FormulaPiece[] list)
{
ArrayList tmp = new ArrayList();
foreach(FormulaPiece str in list) tmp.Add(str);
tmp.RemoveAt(index);
return tmp.ToArray(typeof(FormulaPiece)) as FormulaPiece[];
}
public static FormulaPiece[] Add(FormulaPiece n, FormulaPiece[] list)
{
ArrayList tmp = new ArrayList();
foreach(FormulaPiece str in list) tmp.Add(str);
tmp.Add(n);
return tmp.ToArray(typeof(FormulaPiece)) as FormulaPiece[];
}
