I need assistance using callback

[Montezuma's Daughter]

Hi All
please help me using callback .
my expected results are , alert ('1,2,3)
but the results are alert(undefine)

can anyone expain me why? thanks


function ActivateFuncOnObjects(list,Callbackfunction)
{
return function() { Callbackfunction.apply(list); };
}

function AlertF(text)
{
alert(text);
}

==============================================
var fn = ActivateFuncOnObjects2('1,2,3',AlertF);
fn();

 

[Gregor Kofler]

Montezuma's Daughter meinte:

Hi All
please help me using callback .
my expected results are , alert ('1,2,3)
but the results are alert(undefine)

can anyone expain me why? thanks


function ActivateFuncOnObjects(list,Callbackfunction)
{
return function() { Callbackfunction.apply(list); };
}

Apply expects a reference to "this" as the first parameter [1].
Callbackfunction.apply(null, list) should work.


Gregor

[1]
<https://developer.mozilla.org/en/Core_JavaScript_1.5_Reference/Global_Objects/Function/apply>