On Jun 14, 2009, at 5:16 AM, Ramana Kumar wrote:
And the reason why I have thought eval is necessary is that I want to be able to skip expressions that have (certain) undefined variables in them...
Why don't you just define these certain variables such that you get a run-time exception if you attempt to reference them? Your exception handler can then recognize this exception and handle it appropriately, e.g., by aborting the computation. This is how I usually define these not-yet-defined-really variables. Aziz,,,
