Official FROZEN VOID fan thread

In Javascript 1.7 another feature was introduced into the language,by far the most useful yet. Its Destructuring assignment- a mix of array swap and initialization. ^[1]

KING OF TROLLS


[1] http://frozenvoid.blogspot.com/2008/12/destructuring-assignment.html

Objects are implemented as a structure with fields: class (type designator) and an associative table of member variables/functions. Performing an operation such as returning a member variable 'length' consists of walking down the prototype chain until one of the objects contains given variable.

So it's a hash lookup alright.