Note that your final example:

print join "\t",@{$columns}, "\n";
ends the output with "\t\n" instead of just "\n". Note much of a "bug" in this case, but a common mistake that can often have more serious effects.     print join("\t",@{$columns}), "\n";

        - tye (but my friends call me "Tye")

In reply to (tye)Re2: Not really obfuscation, but..... by tye
in thread Scalar vs. array context w/ join() by mdupont

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