Just when you update a node please mark it accordingly so the development history of the node falls in prospect... Data Dumper can allow you to see whether or not your data structures have what you expect them to have.

ARRAY(0x1f512580) is a pointer in memory referring to the contents held in ARRAY, so to access these contents you need to dereference the reference References quick reference and Referencing in advanced data structures and of course the documentation perlref and perlreftut

[Tutorials] section at the monastery has many useful teachings too