> If they are uninitialized then they are null, 0 or false, depending on the actual type. Or NaN, for an uninitialized Number. - Gordon
________________________________ From: [email protected] [mailto:[EMAIL PROTECTED] On Behalf Of Peter Hall Sent: Thursday, October 25, 2007 7:29 PM To: [email protected] Subject: Re: [flexcoders] Can't use an undefined conditional anymore? Just to tie up the loose ends... if a variable has a type annotation then undefined is an illegal value. Only untyped variables, or variables typed as *, may be assigned with undefined. If they are uninitialized then they are null, 0 or false, depending on the actual type. Your code probably works because the value is actually null, and the == operator does not differentiate between null and undefined (the === operator does however make this distinction). see: http://livedocs.adobe.com/flex/201/langref/specialTypes.html#* <http://livedocs.adobe.com/flex/201/langref/specialTypes.html#*> http://livedocs.adobe.com/flex/201/langref/package.html#undefined <http://livedocs.adobe.com/flex/201/langref/package.html#undefined> Peter On 10/25/07, [EMAIL PROTECTED] <mailto:[EMAIL PROTECTED]> <[EMAIL PROTECTED] <mailto:[EMAIL PROTECTED]> > wrote: Nice - much more elegant - thanks alot > if(foo) will give you the same result. basically if the instance is there > it'll work else it won't > > On 10/25/07, [EMAIL PROTECTED] <mailto:tim%40e-smartz.com> < [EMAIL PROTECTED] <mailto:tim%40e-smartz.com> > wrote: >> >> Hi, >> >> I used to do conditionals based on undefined all the time in AS 2. For >> example I would do a data look up and then cast the results to a class >> called foo. Then I could do a conditional if (foo == undefined) // go >> and >> do whatever as the data ovbiously doesn't exist or has not been >> recieved. >> Now in AS3 this method still works but I get a warning that the class >> cannot be undefined and undefined will be type coerced into a foo class. >> As I said it still wors so I'm not too fussed, but it's never good to >> see >> warnings! >> >> Tim >> >> >> > > > > -- > j:pn > \\no comment >
