Your code still exhibits a race condition between the point of generation of the 'unique' name and the later use of it in the code - There is no subsequent check for existence of uniqueness at the point of usage.

While your code certainly has merit, it would be better written within a while loop, actually creating the destination object rather than simply determing the object name, in the event of the available 'unique' name. Alternatively, there still exists the possibility that a similarly named object is created between the time of your determination of the available unique name and the point of object creation. I dicussed this point in a recent meditation I posted with regard to the usage of temporary files within Perl here.

 

perl -e 's&&rob@cowsnet.com.au&&&split/[@.]/&&s&.com.&_&&&print'