While I understand your point and would not dream of trying to convince you to change, I usually try to use unless in very specific contexts. If there is only one condition and it would normally be expressed as a negative, I find unless {cond} much cleaner than if !{cond}.

I can understand the point about people not being able to DeMorganize in their heads. (I knew a really, really good programmer once who regularly had problems with and and or) But, I have found that sometimes unless is clearer (just like in English.)

G. Wade

In reply to Re^4: Burned by precedence rules by gwadej
in thread Burned by precedence rules by vrk

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