Test whether a glob has any matches in bash

Question

If I want to check for the existence of a single file, I can test for it using test -e filename or [ -e filename ].

Supposing I have a glob

Answer 1

If you have globfail set you can use this crazy (which you really should not)

shopt -s failglob # exit if * does not match 
( : * ) && echo 0 || echo 1

or

q=( * ) && echo 0 || echo 1