The purpose of this utility routine is to check to be sure the object argument is valid and belongs to the specified object class. It is more useful than the built-in Obj_Isa function, because it can handle undefined variable arguments.
Utilities
The function returns a 0 to indicate FALSE or a 1 to indicate TRUE. If passed an array of objects, it will return an array of 0s and 1s for each object.
object: in, optional, type=object The object reference to check. It may be undefined. This variable may also be an array. classname: in, optional, type=string The object class name. If undefined, the function always returns false.
Here is how to use this program:: IDL> IF cgObj_ISA(object, 'cgKML_Feature') THEN object -> SetProperty, PLACENAME='Boulder'
FANNING SOFTWARE CONSULTING:: David W. Fanning 1645 Sheely Drive Fort Collins, CO 80526 USA Phone: 970-221-0438 E-mail: david@idlcoyote.com Coyote's Guide to IDL Programming: http://www.idlcoyote.com
Change History:: Written, 4 Novemeber 2012 by David W. Fanning.
Copyright (c) 2012, Fanning Software Consulting, Inc.