Invisible contents of a variable array?

[Roger]

I have a list of files and folders assigned to variable _files[] array.

For calculating the total size of a list of files and folders, I am using du 
with _files[@], I then get a division by zero warning.

du --bytes --total "${_files[@]}" | tail --lines=1 | cut --fields=1
du: invalid zero-length file name

Printing the contents of the variable _files[@] array only obviously prints 
visible files/folders.

My guess is, without reading extensively into the bash manual, du is also being 
passed a null termination character?  Crazy guess, as the du size in bytes is 
so far correct.

Is there anything I can do to prevent this division by zero operation, or just 
quietly the error by passing the output to /dev/null?

Roger

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