You're missing the context. He doesn't have a modern Text::CSV, and it's easier instructing this particular monk to install Text::CSV_XS (simple ppm command) than to have him upgrade Text::CSV (which would require installation of make tools, an exercise requiring at least 5 posts to explain to this monk).

In reply to Re^3: Explanation of Perl one-liner required by ikegami
in thread Explanation of Perl one-liner required by Win

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