smart input

[Ray Andrews <rayandrews@xxxxxxxxxxx>]

I have a function that takes input from a file like so:

    input=( ${(f)"$(<$@)"} ) # Read the contents of file

I know how to modify that to accept input from an array, but would it be 
possible to make it smart?  That is, to accept input from either a file 
or an array as the case may be?  I have some ideas like: " [ -e ... ] " 
to test if the argument is infact a filename, but is there some elegant 
method?