New: dictionary literals in Objective-J 2.0.
New: array literals in Objective-J 2.0.

Array literals look like `@[a, b, c]`.

This syntax is supported for completeness and source compatibility, but are not terribly useful since standard JavaScript arrays are toll-free bridged to CPArray.

Array literals could be handy if you're replacing CPArray with your own implementation.
Improve code readability with dictionary literals.
More dictionary literals.