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Re: How do I test for existence of a list element?
I think you're looking for MemberQ If you're doing a lot of work on lists, I suggest you browse the ListManipulation help files for a while. Mathematica has a lot of powerful built in functions that might make your work a lot easier. Best, Robert On Sep 25, 2010, at 1:20 AM, Joseph Gwinn wrote: > I have an application where I am bouncing around in a list, and may > accidentally ask for an element beyond the end of the list, which causes > Mathematica to complain and balk, preventing completion. > > Is there any way to test for the existence of a list element without > provoking complaint or balking should the list item fail to exist? > > Thanks, > > Joe Gwinn >