I was writing a module as part of my application when I noticed syntax check results in warning about useless use of a constant (1). Why is that? The constant is the obligatory 1 at the end of the...

So, I never knew this and I want to get some clarifcation on it. I know if you do foreach (@list){ if you change $_ in that loop it will affect the actual data. But, I did not know that if you d...