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Hi,
If I add an after_save callback to an ActiveRecord model, and on that callback I use update_attribute to change the object, the callback is called again, and so a 'stack overflow' occurs (hehe, couldn't resist).
Is it possible to avoid this behavior...
Started by Ivan on
, 11 posts
by 10 people.
Answer Snippets (Read the full thread at stackoverflow):
Class Foo << ActiveRecord::Base the callback runs def....
I solved it by using conditional invocation for the callback ...
Could you use the before_save callback instead?
If you use before_save, you can modify any additional.
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In c++, when and how to use a callback function?
EDIT: I would like to see a simple example to write a callback function.
Started by Dave17 on
, 6 posts
by 6 people.
Answer Snippets (Read the full thread at stackoverflow):
Callback mechanisms are often implemented via function pointers, functor objects....
A Callback function is a method that is passed into a routine, and called at some point?
There isn't an explicit concept of a callback function in C++.
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I asked a question about callbacks and arrived at another question (see comment). How is a closure different from a callback?
Started by leeand00 on
, 6 posts
by 6 people.
Answer Snippets (Read the full thread at stackoverflow):
Different....
See example 4.
The bit that makes it a closure them).
A callback/javatutors/closures2.shtml
Basically, the callback is like a function pointer.
In practice, that means it's a function that has some hidden variables .
The expression).
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Is it possible to pass callback objects (with callback methods) to a wcf service method?
Let's presume i have the following class:
class Callback { public Callback(){} public int GetSomeData(int param) { return param; } }
Is it possible somehow to make...
Started by Elz on
, 3 posts
by 3 people.
Answer Snippets (Read the full thread at stackoverflow):
[ServiceContract] public interface ICallback { [OperationContract(IsOneWay.
As the callback contract.
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Hi, I've got a problem.
I need additional status like Callback - e-mail sent previously', so I've added it to System Statuses and checked 'Y' in selectable, human answer, customer contact, callback - just like in CALLBK status.
I've decided to test it...
Started by mumin37 on
, 2 posts
by 2 people.
Answer Snippets (Read the full thread at net):
If you're not sure, set up a "fake" system in VMWare or an old workstation .
On systems we use we get the ability to select callback data upon creating a custom callback status.
May need an upgrade.
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How are callbacks written in PHP?
Started by Nick Stinemates on
, 10 posts
by 10 people.
Answer Snippets (Read the full thread at stackoverflow):
Function doIt($callback) { $data = "this is my data"; $callback($data); } // This is a sample callback function() and pass our sample....
Implementation of a callback is done like so
// This function uses a callback function.
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I need to execute a callback when an IFRAME has finished loading. I have no control over the content in the IFRAME, so I can't fire the callback from there.
This IFRAME is programmaticly created, and I need to pass its data as a variable in the callback...
Started by FlySwat on
, 10 posts
by 10 people.
Answer Snippets (Read the full thread at stackoverflow):
Exactly the same problem in the past and the only way I found to fix it was to add the callback try switching the order of:
document.body.removeChild(iFrameObj); callback(iFrameObj.innerHTML, a solution could be the following:
function ....
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Answer Snippets (Read the full thread at stackoverflow):
The function....
In a client callback, a client-script function sends a request://msdn.microsoft.com/en-us/library/ms173172.aspx
A callback is a function pointer that you pass in to another function.
That it can perform client callbacks.
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Can someone please explain to me what is the difference between an event handler and a callback function?
Started by 6pack kid on
, 7 posts
by 7 people.
Answer Snippets (Read the full thread at stackoverflow):
An event handler is a procedure called ....
The procedure it.
A callback is procedure you pass as an argument to another procedure.
The term is usually and so on.
It's called whenever an event occurs.
An event handler is a type of callback.
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Hi there.
Im trying to return a callback value after the data is loaded, Im probably looking at this all wrong.
var loadFromDatabase = function(callback){ if (!obj.data.myarray) { // the problem is here, the jquery obj returns the ajax request obj return...
Started by Sveisvei on
, 5 posts
by 5 people.
Answer Snippets (Read the full thread at stackoverflow):
You have to use one more callback function:
var loadFromDatabase = function(callback){ if (!obj.data....
Should be just:
return callback;
Doing return callback() executes the callback function and returns its return value.
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