How to use string.Endswith to test for multiple endings?

Question

I need to check in string.Endswith(\"\") from any of the following operators: +,-,*,/

If I have 20 operators I don\'t want to use ||<

Answer 1

If you really want to, you can use De Morgan's laws to replace x || y in your code. One version says:

!(x || y) == !x && !y

If you want to have the same result, we just need to negate the entire expression twice:

x || y == !!(x || y) == !(!x && !y)