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Alex Rivera
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Sometimes we want an optional parameter function doSomething(foo:Integer; bar:TObject=nil) begin if bar <> nil then // do something optional with bar .... end How do I do the equivalent with a boolean, that allows me to differentiate between the two boolean values and "no value"? function doSomething(foo:Integer; bar:Boolean=nil) // Won't compile begin if bar <> nil then // do something optional with bar end Obviously this won't compile as a Boolean cannot be nil. Basically, I want a parameter with three possible states; true, false or "unspecified".
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