Re^3: Name "main::a" used only once: possible typo (limitations of "sort" like functions)

[LanX]

> LanX, what I don't understand is why this warning, and the way to deal with it by the user of the module is not mentioned in the documentation as a limitation of perl/the module.

I can only suppose that the problems are so overwhelming, that the authors don't know how to describe them.