If you understand the rule that it's ok to copy undef to another variable, but not use it in an operation, all of these make perfect sense.

-- Randal L. Schwartz, Perl hacker

The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this document are to be interpreted as described in RFC 2119.

In reply to Re: uninitialized $_ sneaks past warnings in grep/map block or expression by merlyn
in thread uninitialized $_ sneaks past warnings in grep/map block or expression by rir

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