On Wed, 29 Dec 2010 08:25:33 +0100, Emeka <[email protected]> wrote:
Is Prototype JavaScript's way of solving Expression Problem? And what is
really the difference between __proto__ and Prototype?
That depends on what you mean by "Prototype".
The internal [[Prototype]] link of objects is a way to inherit (and
thereby share)
properties of other objects. It can be used to add new functionality to an
unknown
number of existing objects, by assigning the functionality to their shared
prototype,
and that way it can be used to solve the Expression Problem. It just
requires that
the Expressions all inherit from a shared prototype object.
The non-standard __proto__ property is some Javascript engines' way of
reflecting the
internal [[Prototype]] property, making it accessible for both reading and
writing.
It's not-standard and not supported by all engines.
/L
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