Why must I define a commutative operator twice?

Question

I wonder if I must define a commutative operator (like *) twice!

public static MyClass operator *(int i, MyClass m)
{
    return new MyClass(i *         


        

Answer 1

For commutative operations, you don't need to implement the entire thing twice, you can reference the initial operator. For example:

    public static Point operator *(Point p, float scalar)
    {
        return new Point(
                scalar * p.mTuple[0],
                scalar * p.mTuple[1],
                scalar * p.mTuple[2]
            );
    }

    public static Point operator *(float scalar, Point p)
    {
        return p * scalar;
    }

I hope that this helps.