[Javascript] Unexpected Result

[Robert Kim Wireless Internet Advisor]

Guys... i forwarded this to my buddy who is a java master... i suppose
i could have just told you about it after he responded but if you want
to reach him directly... email... pjagwani @gmai...

He's working on the same issues

On Thu, Aug 5, 2010 at 12:36 AM, liorean <liorean at gmail.com> wrote:
>> On Wed, Aug 4, 2010 at 2:51 AM, liorean <liorean at gmail.com> wrote:
>>>>> If you want to do the equivalent of passing around
>>>>> references, then you need to pass around a reference type from which
>>>>> you read a property, and store new values in a property of that
>>>>> object.
>>> Reference type means object, array, function mostly. Things that
>>> aren't value types/primitives.
>>>
>>>    QQ = $.a.LASTLOSER; // => 5
>>>    QQ[2] = 2; // => 2
>>>    QQ[2]; // => 2
>>>    $.a.LASTLOSER[2] // => 2
>
>
> On 4 August 2010 15:47, Mike Dougherty <mdougherty at pbp.com> wrote:
>> So how do we get an object reference to a single element of an array?
>> Is it possible?
>>
>> var myArray = ['a','b','c'];
>> var refArray = myArray; /* this makes a reference to the object */
>> var pos1 = myArray[1];  /* this makes a value assignment to an
>> arbitrary variable */
>> refArray[0] = "X";  /* assign "X" to element 0 of refArray, which is
>> effectively an alias of myArray */
>> pos1 = "Y"; /* assign "Y" to an arbitrary variable */
>>
>> alert( myArray.join(",") );  /* displays: X,b,c */
>>
>> Is it possible to get references to primitive array elements?  If I
>> really needed to do this, would I have to make each element an object
>> so the array element references an object and a variable assigned the
>> element would also get the object reference?
>>
>> var myObjArray = [ {"value":"a"},{"value":"b"},{"value":"c"} ];
>> var pos1 = myObjArray[1];
>> pos1.value = "X";
>>
>> alert( myObjArray.toJSONString() );  /* or some other way to display a
>> complex object */
>
> Making every value you want to do this with be contained in an object
> will definitely work. Another way to do it is through using a closure
> and a function call:
>
>    function enclose(obj,prop){
>        return function(val){
>                return arguments.length>0?
>                    obj[prop] = val:
>                    obj[prop];
>            };
>    }
>
>    QQ = enclose($.a.LASTLOSER,2); // => fn() -> 5
>    QQ(2) // => 2
>    QQ() // => 2
>    $.a.LASTLOSER[2] // => 2
>
> I'm pretty sure you could use getters and setters or maybe toString,
> valueOf bindings on objects to achieve the same or similar effects
> without the function call syntax, too.
> --
> David "liorean" Andersson
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Robert Q Kim
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310 598 1606

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