There are two types of variables you can modify in your callers namespace:

• All package variables (well, technically, package variables are the only variables with a "namespace").
• All lexical variables that share the same scope as your subroutine.

That is, lexical variables that don't share a scope are unreachable. And that's a good thing, that's why you have lexical variables in the first place.

Abigail

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