I do not believe for one second that you think that `foo` is in anyway equivalent to "explicit undef".

Both are means of producing the same value.

Nor do I believe that you--uniquely amongst the responders in this thread--cannot interpret the explicit use of undef in the OP

Nor should you. What wasn't clear is that you wanted to you only wanted to disable the warning when the undef function was used. In your mind, undef is some magical value. In mine, it's a function like any other.

I don't know why you say I'm unique. moritz said said exactly what I did.

In reply to Re^9: Use of uninitialized value in substr by ikegami
in thread Use of uninitialized value in substr by BrowserUk

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