Yes. And using an undefined value as if it were a string makes it act like an empty string. Perhaps the OP hadn't enabled warnings, and saw this behaviour, leading to the confusion.

But that's a lot of speculation.

In reply to Re^2: When testing for certain hash positions as non-zero, why werent the test positions set to empty string? by JavaFan
in thread When testing for certain hash positions as non-zero, why werent the test positions set to empty string? by metaperl

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