Allow me to toil in some scrivener's work. In the "Non-Lexical Loop Iterators" section of PBP, the oracle speaks:
Always declare a for loop iterator variable with my.
and goes on to explain that, if there happens to be a lexical variable with the same name as the loop variable declared before the loop, that lexical variable is not reused within the loop, but a brand new independent lexical variable is implicitly created to take effect within the scope of the loop alone. Quoting the discussion there:
This behaviour is contrary to all reasonable expectation. Everywhere else in Perl, when you declare a lexical variable, it is visible throughout the remainder of its scope, unless another explicit my declaration hides it.
Update: wfsp sent me a link to this related node.

In reply to Re^2: Hidden Secrets of PERL by fenLisesi
in thread Hidden Secrets of PERL by perl_lover

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