I forget the case for boolean but the null equivalent (ie declared but no value) of Number is NaN. Wouldnt that work for you ?
On 9/18/07, Samuel R. Neff <[EMAIL PROTECTED]> wrote: > > > We use xxx.MIN_VALUE to represent null on both client and server (.NET). > We've been doing it in .NET for several years and now with Flex > integration > it works very well. Of course everyone needs to recognize that MIN_VALUE > is > being used this way and if you actually had to store MIN_VALUE then you > have > a problem, but we've never had the need. > > Of course this doesn't work for Boolean, so for Boolean if you need > nullable > then declare as int instead and use int.MIN_VALUE for null, 0 for false, > everything else for true. > > .NET itself now has nullable types which would be more elegant but they > have > performance implications and would not provide as good interoperability > with > Flex. > > HTH, > > Sam > > ------------------------------------------- > We're Hiring! Seeking a passionate developer to join our team building > Flex > based products. Position is in the Washington D.C. metro area. If > interested > contact [EMAIL PROTECTED] <careers%40blinemedical.com> > > -----Original Message----- > From: [email protected] <flexcoders%40yahoogroups.com> [mailto: > [email protected] <flexcoders%40yahoogroups.com>] On > Behalf Of merelypixels > Sent: Tuesday, September 18, 2007 1:16 PM > To: [email protected] <flexcoders%40yahoogroups.com> > Subject: [flexcoders] nulling primitive data types > > Hello All, > I've been running into a rather frustrating issue with flex: namely > that although data types are supposedly implemented as AS classes, you > cannot null variables of primitive data types e.g. > > var blah:int = null; //blah == 0 > var blah:Number = null; //blah == 0 > var blah:Boolean = null; //blah == false > > admittedly we can define -1 as null for non-Boolean types, but what if > a negative number becomes a logical value in some case? > > now this wouldn't be a problem if we didn't have to communicate with a > SQL back-end, but sometimes I need to be able to pass a null value to > the db either to signify that the current value shouldn't be changed > or to specify that information is not currently known for the value. > > ... > > Thanks for your time, > Pixels > > > -- Arpit Mathur Lead Software Engineer, Comcast Interactive Media --------------------------------------- post your flex tips on http://flextips.corank.com
