Reference objects aren't just useful when memory is at a premium; they can also be used to provide slick caching abilities to any application.

Most Java developers who come from a C/C++ background have probably at one time wished for a Java equivalent of sizeof(). Although Java lacks a true sizeof() equivalent, the Instrumentation interface ...

Whereas Java and several other programming languages have a wide and rich range of datatypes and collections types, JavaScript only has a small number of primitive datatypes (Boolean, Number, String, ...