My current project requires that I archive data releases in a series of numbered sub-directories. The directories are, rather unimaginatively, called v1.00, v2.00, v2.01, for example. My routine will create the next version sub-directory, e.g. v3.00, before archiving the new release of data there.

Here's the question: I'm using Find::File::name to get the names of pre-exisiting "vX.YY" directories. I push the output of Find::File::name onto an array. How do I pass the array, (array reference), to a subroutine and determine if it is zero-length or not?

What I've written so far seems to work provided the subroutine is in the same file as the main program. What I want to do is place the sub in a module and this is where it all goes wrong!

Any ideas?

In reply to How to determine if an array passed as an argument to a subroutine is zero-length by Withnail

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