reverses the reverse
reminds me of a UK West Country phrase
theze bin an gotten whur thee casn't back'n assn't
You would think that it wouldn't be possible but every driver knows that it is.

I have the same trouble with unless. It is very simple but I too often get it wrong. I tend to stick with 

... if not exists $options{'r'};

[download]
Not as elegant but it tends to increase my chances :-)

In reply to Re^2: calling a function based on a condition by wfsp
in thread calling a function based on a condition by Anonymous Monk

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