I think what you mean by "opposite", is that you want something that returns $this when $this // $that would normally return $that, and you want to do it in one line with only one mention of each of the 2 expressions:

defined ( $this ) ? $that : undef

defined ( $this ) && $that || undef

Arnon Weinberg Back2Front - The Web Site People

In reply to Re: What's the opposite of // (err) operator? by thewebsi
in thread What's the opposite of // (err) operator? by John M. Dlugosz

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