I had to invert the (physical source-code) positioning of the package and main code in order that %num_for would be set up prior to the constructor being called. Alternatively, I could separate the package into a .pm file.

With either correction, this produces the correct output quite efficiently.

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In reply to Re^2: One for the weekend: challenge by BrowserUk
in thread One for the weekend: challenge by BrowserUk

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