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So there is
record.new_record?
To check if something is new
I need to check if something is on it's way out.
record = some_magic record.destroy record.is_destroyed? # => true
Something like that. I know destroying freezes the object, so frozen? sort...
Started by Daniel Huckstep on
, 5 posts
by 5 people.
Answer Snippets (Read the full thread at stackoverflow):
Attr_accessor :destroyed after_destroy :mark_as_destroyed that, you could certainly add a "destroyed" attribute to your models that you trigger in the callbacks and that could be checked....
Is to do a callback as theIV mentioned.
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When you release an object in Objective-C (assuming its release count is 1) its release count is decremented to 0 and the dealloc method called. Is the object destroyed right there and then after the [super dealloc], or is it added to the pool and destroyed...
Started by fuzzygoat on
, 3 posts
by 3 people.
Answer Snippets (Read the full thread at stackoverflow):
When you're returning a fresh object that you don't want to own, whose lifetime is unknown, and you don... .
The autorelease system is for objects who's ownership is a little "ambiguous" - i.e .
Yes, they are deallocated as soon as the retain-count hits zero .
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Let's say I have 2 singletons, allocated on the heap, for which no delete is ever called. Let's call them A and B. Is there any way to make sure B will be the first one to be destroyed?
I'm assuming the platform may matter on this one: Visual Studio 2...
Started by Geo on
, 4 posts
by 4 people.
Answer Snippets (Read the full thread at stackoverflow):
On the other hand, If you created will be the last one destroyed:
static std::auto_ptr <AType> a( new AType ); // destroyed second static std::auto_ptr....
Then they will never be destroyed, so the order of destruction is moot.
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Ask your Facebook Friends
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Suppose I have this code...
class GraphFactory : public QObject { private: QMap<QString, IGraphCreator*> factory_; public: virtual ~GraphFactory(); }; GraphFactory::~GraphFactory() { // Free up the graph creators QMap<QString, IGraphCreator*&...
Started by Extrakun on
, 5 posts
by 5 people.
Answer Snippets (Read the full thread at stackoverflow):
After GraphFactory::~GraphFactory , but before QObject.
It'll be destructed after they get destroyed after it gets executed.
Returns to the caller that destroyed your GraphFactory instance.
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Can I trust that an object is destroyed and its destructor is called immediately when it goes out of scope in C#?
I figure it should since many common coding practices (e.g. transaction objects) rely on this behaviour, but I'm not very used to working...
Started by sharkin on
, 7 posts
by 7 people.
Answer Snippets (Read the full thread at stackoverflow):
In .Net is called finalizers) are not called until GC finds it proper to destroy the objects.
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Hello, I have the following implementation of HttpSessionlistener
public class SessionListener implements HttpSessionAttributeListener, HttpSessionListener { public void attributeAdded(HttpSessionBindingEvent event) { ... } public void attributeRemoved...
Started by Flueras Bogdan on
, 6 posts
by 6 people.
Answer Snippets (Read the full thread at stackoverflow):
This....
So that it can destroy some session.
Only the server can create or destroy sessions.
Hence the time out is in place and is the first in the server and are controlled by the server .
Java can not know when to destroy the session.
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Hi!
Is there a way to get a notification that a thread no longer runs (has returned) in your application?
I know this is possible in kernel mode (using PsSetCreateThreadNotifyRoutine), but is there a way to know this from user mode, using only Win32 API...
Started by lgratian on
, 5 posts
by 5 people.
Answer Snippets (Read the full thread at stackoverflow):
If the FLS slot is in use, FlsCallback is called on fiber deletion, thread exit, and when an FLS... .
From MSDN:
FlsAlloc , FlsCallback , FlsFree
FlsCallback Callback Function
An application-defined function .
Similar functionality is available with Fibers.
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I've got a script that sets some session values before redirecting to / using header() .
I've read many posts about the $_SESSION variable being destroyed / lost after header() , even after I implemented this:
// set session here session_regenerate_id...
Started by ILMV on
, 3 posts
by 3 people.
Answer Snippets (Read the full thread at stackoverflow):
This answer made a lot more sense before you added the session_start bits above, and mentioned the fact that you... .
I've never seen any session related issues due to using location headers - are you sure you're calling session_start on both pages?
Hmm.. .
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Normally using GDI+ in Delphi you can use a TPaintBox , and paint during the OnPaint event:
procedure TForm1.PaintBox1Paint(Sender: TObject); var g: TGPGraphics; begin g := TGPGraphics.Create(PaintBox1.Canvas.Handle); try g.DrawImage(FSomeImage, 0, 0)...
Started by Ian Boyd on
, 4 posts
by 4 people.
Answer Snippets (Read the full thread at stackoverflow):
If you're doing this often.
Can use the methods in TMyControlCanvas to dynamically create and destroy your TGPGraphics to the TPaintBox.WindowProc property and watch for wm_Destroy messages.
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Hi Guys,
When we use any attached property against any dependency object, I thunk it actually maps the property and the value with the dependency object.
E.g. <DockPanel><TextBlock x:Name="MyText" DockPanel.Dock="Top"/></DockPanel>
Here...
Answer Snippets (Read the full thread at stackoverflow):
Don't....
In your example, this would be the textblock.
As I understand the new property system in the WPF, the DependecyObject itself stores the value .
So removing of empty references takes place periodically.
I think it was created using WeakReference.
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