- see footer for list info -<
Mark Smyth wrote:
Sorry I didn't respond to you yesterday - hadn't noticed until late last night that my cfmaster account was frozen by an empty email again [Russ!]- see footer for list info -<
Cheers Kola!
Very interesting
Regards
Mark
As Kola has told you it was a long thread that I put my 2p into at the time to help clarify for myself exactly what was happening between isDefined() and StructKeyExists(). Something that isn't mentioned in Sean's blog that I managed to gleen, is that all scopes are always defined even if there are no variables in a particular scope. Add that to the fact that all scopes are now structs, you can get a much more direct check on a variable using StructKeyExists() than you can with IsDefined().
The main reason for using StructKeyExists over IsDefined() is that IsDefined() will always do a sweep of all scopes even if you specify the scope as part of the variable to check for, where as StructKeyExists() will only look where you tell it to look.
eg. form.myvar
StructKeyExists(form,"myvar") will only look for myvar in the form scope.
IsDefined("form.myvar") will look for form.myvar, variable.form.myvar, form.form.myvar and so on......
So there you go.
Stephen
_______________________________________________
For details on ALL mailing lists and for joining or leaving lists, go to http://list.cfdeveloper.co.uk/mailman/listinfo
-- CFDeveloper Sponsors:-
- Hosting provided by www.cfmxhosting.co.uk -< - Forum provided by www.fusetalk.com -< - DHTML Menus provided by www.APYCOM.com -< - Lists hosted by www.Gradwell.com -< - CFdeveloper is run by Russ Michaels, feel free to volunteer your help -<
