I think its because he's showing some old code he wrote, not new code. I mentioned the "local our" oddity in an earlier question of his on Re: perl variable displayed as a hash value.

If you spot any bugs in my solutions, it's because I've deliberately left them in as an exercise for the reader! :-)

In reply to Re^2: local our by space_monk
in thread DIfference in days hours and second between dates by *alexandre*

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