On 1 February 2010 15:44, buda wrote:
> it was simple sheme and it wasnt the stright code
> it must be like this
>
> var Obj = {};
> ...
> Obj.meth = Prototype.emptyFunction;
> ...
> if (Obj.meth !== Prototype.emptyFunction) {
> alert('Not equal');
> }
>
> does this irritates you?
>
> On Feb 1, 5:37 pm, Alex Wallace wrote:
>> This is getting into dirty territory (or at least I'd feel so) but:
>>
>> >>> var x = function(){};
>> >>> var y = function(){ alert("foo"); }
>> >>> x + "";
>> "function () { }"
>> >>> y + "";
>>
>> "function () { alert("foo"); }"
>>
>> Best,
>> Alex
>>
>>
>>
>> On Mon, Feb 1, 2010 at 10:29 AM, buda wrote:
>> > the question is: how to check if a function is empty or have any code
>>
>> > On Feb 1, 5:18 pm, Richard Quadling wrote:
>> > > On 1 February 2010 13:02, buda wrote:
>>
>> > > > var Obj = {};
>> > > > Obj.meth = Prototype.emptyFunction;
>>
>> > > > if (Obj.meth !== Prototype.emptyFunction) {
>> > > > alert('Not equal');
>> > > > }
>>
>> > > > why alert show everytime?
>>
>> > > > --
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>>
>> > > Why?
>>
>> > > The main advantage of the emptyFunction is that you can always call it
>> > > without having to do a null/undefined test first.
>>
>> > > If you want to know if it has been assigned something, then don't
>> > > assign the emptyFunction, leave it as null and then test if it is
>> > > null.
>>
>> > > --
>> > > -
>> > > Richard Quadling
>> > > "Standing on the shoulders of some very clever giants!"
>> > > EE :http://www.experts-exchange.com/M_248814.html
>> > > EE4Free :http://www.experts-exchange.com/becomeAnExpert.jsp
>> > > Zend Certified Engineer :
>> >http://zend.com/zce.php?c=ZEND002498&r=213474731
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>>
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>
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>
Can you try ...
alert((Obj.meth + '') == (Prototype.emptyFunction + ''));
I'm getting True for when Obj.meth is the emptyFunction.
--
-
Richard Quadling
"Standing on the shoulders of some very clever giants!"
EE : http://www.experts-exchange.com/M_248814.html
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