The empty list (), which evaluates to undef.

When's the last time you did if (()) {}? Why would you ever do that?

I suppose one could use sub f { return (); } if (f()) {}, but that's a very bad practice. (A sub that's expected to return a scalar should do so even in list context.)

So I'm rather baffled as to why this was mentioned. There are so many operators that can return false that would merit a mention before (), such as scalar assignment, list assignment, grep, map, m// and s///.

In reply to Re: Truth and Falsehood by ikegami
in thread Truth and Falsehood by haukex

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