A JavaScript array's {{jsxref("Array/length", "length ... Elements of the original array(s) are copied into the new array as follows: Objects: the object reference is copied into the new array. Both ...

Same can be done with another variable which is using objects reference. Now object is not using by any other reference, so javascript can destroy it and release its associated memory. var a = ...

On certain rarer occasions, you run into the need to be notified when a JavaScript object is going to be garbage collected. This feature is exposed to V8's C++ API, but not to JavaScript. That's where ...

provides a complete overview of the core JavaScript language and client-side scripting environment, as well as quick-reference material on core and client-side objects, methods, and properties. The ...