Le 30 juin 2011 à 08:19, James Merkel a écrit :
>
> On Jun 29, 2011, at 11:07 PM, Kyle Sluder wrote:
>
>> On Wed, Jun 29, 2011 at 10:38 PM, James Merkel wrote:
>>> Ok, thanks. For what I'm doing file descriptors are not a scarce resource.
>>
>> File descriptors are almost always a scarce reso
On Jun 30, 2011, at 3:02 AM, Jean-Daniel Dupas wrote:
> Le 30 juin 2011 à 08:19, James Merkel a écrit :
>
>> Ok, I'm looking at my application in Instruments File Activity. The column
>> labeled FD I assume means file descriptors. Is that the total number of FDs
>> in use at any given time?
>
Hello,
I have an application in which the user can continuously zoom and pan a canvas
(kind of like Google Maps). On the canvas, a user can have multiple text
items. Each text item is a Core Animation layer, and the text is drawn using
NSLayoutManager's drawGlyphsForGlyphRange method.
When t
On 2011 Jun 29, at 23:08, Kyle Sluder wrote:
> On Wed, Jun 29, 2011 at 10:40 PM, wrote:
>> Is there a way to check if the NSUndomanager is in an unstable state and
>> reset it?
>
> No, NSUndoManager is very fragile, and if it gets into a bad state it
> is not recoverable.
and it's a black bo
On Jun 30, 2011, at 2:01 AM, Ken Thomases wrote:
On Jun 30, 2011, at 3:02 AM, Jean-Daniel Dupas wrote:
Le 30 juin 2011 à 08:19, James Merkel a écrit :
Ok, I'm looking at my application in Instruments File Activity.
The column labeled FD I assume means file descriptors. Is that the
total
On 2011-06-29, at 21:50 , Quincey Morris wrote:
> You're looking for provable correctness. That's laudable, and will probably
> mean that you keep all of your fingers. But you'll still end up in the
> emergency room -- in your case it will be for a stress-induced ulcer. :)
My university profes
Since nobody was able to provide real answers to my questions, I wrote some
dummy code to find out as much about that issue as possible. Here are the
results:
Remember, I listed the following cases:
> a) retain
> b) retain, nonatomic
> c) copy
> d) copy, nonatomic
On Jun 30, 2011, at 9:20 AM, James Merkel wrote:
On Jun 30, 2011, at 2:01 AM, Ken Thomases wrote:
On Jun 30, 2011, at 3:02 AM, Jean-Daniel Dupas wrote:
Le 30 juin 2011 à 08:19, James Merkel a écrit :
Ok, I'm looking at my application in Instruments File Activity.
The column labeled FD I
Hello,
I wrote a method for NSArray.
- (NSArray *)objectsForKey:(id)key
{
NSMutableArray *objectsArray = [NSMutableArray arrayWithCapacity:10];
for( id item in self )
{
[objectsArray addObject:[item objectForKey:key]];
}
r
Yeah, that should be fine, but it's unnecessary.
You can just do:
NSArray *objectsArray = [theArray valueForKey:key];
And it'll do pretty much the same thing (except that it'll call -valueForKey:
on each item in the array, and not objectForKey:. However, if the objects are
NSDictionaries, tha
On Thu, Jun 30, 2011 at 9:20 AM, James Merkel wrote:
> After a fair amount of application warm-up the FD
> shows 25 to 26. So, I assume I'm ok.
And what happens when (not if) you introduce a leak, and these objects
live longer than you expect them to? Or worse, someone else starts
holding on to t
On Jun 30, 2011, at 12:04 PM, Kyle Sluder wrote:
On Thu, Jun 30, 2011 at 9:20 AM, James Merkel
wrote:
After a fair amount of application warm-up the FD
shows 25 to 26. So, I assume I'm ok.
And what happens when (not if) you introduce a leak, and these objects
live longer than you expect th
On Thu, Jun 30, 2011 at 12:12 PM, James Merkel wrote:
> Ok, I don't know what an -invalidate method is, but I'll look it up.
It's the thing Wim talked about. An explicit way to release the scarce
resource you're holding on to. Depending on what that resource is, an
appropriate name might be -clos
You might also try HBCollections, a series of collections categories I wrote
that makes it easy to do stuff like this.
https://github.com/hborders/HBCollections
-Heath
On Jun 30, 2011 2:10 PM, "Dave DeLong" wrote:
___
Cocoa-dev mailing list (Cocoa-dev
On Jun 30, 2011, at 12:21 PM, Kyle Sluder wrote:
On Thu, Jun 30, 2011 at 12:12 PM, James Merkel
wrote:
Ok, I don't know what an -invalidate method is, but I'll look it up.
It's the thing Wim talked about. An explicit way to release the scarce
resource you're holding on to. Depending on wha
On 2011 Jun 29, at 10:11, Kyle Sluder wrote:
> -[NSRunningApplication activateWithOptions:]
Thank you, Kyle, that works. Indeed, in Mac OS 10.6+, the code
[[NSRunningApplication currentApplication]
activateWithOptions:NSApplicationActivateIgnoringOtherApps] ;
activates the app, but only brin
Um... Thanks for your reply.
The last time I used that was about 5 or 6 years ago, and I wondered yesterday
where it went away. :)
Thanks for pointing out that method.
BTW, my actual question was if it is meant to use fast enumeration in a
collection class implementation.
Although I tried to ad
On 2011 Jun 30, at 13:33, James Merkel wrote:
> I'm not sure where I would do that [-invalidate, releaseResources,
> removeObservers, whatever]
That's a common dilemma. There is no general solution. Each situation will
have its own least-worst solution.
> Apple could have helped things alon
On Jun 30, 2011, at 1:33 PM, James Merkel wrote:
> We find from Kernighan and Ritchie (K&R) second edition, section 8.1 that a
> file descriptor is a small non-negative integer that refers to a file and is
> maintained by the system.
Actually file descriptors are used for any sort of I/O chann
On Jun 30, 2011, at 2:39 PM, Jerry Krinock wrote:
> However, Cocoa still wins. My purpose was to show an alert-type of window
> (my own custom version of NSAlert) without bringing forward a document
> window. Initially, it works, but when the user clicks a button which sends
> -[NSWindow clos
On Jun 30, 2011, at 13:51, JongAm Park wrote:
> The rationale behind "enumerator" pattern is to unify the way to access
> collection classes no matter what they actually look like.
> So, enumerator pattern is actually written in index based iteration wrapped
> with enumerator pattern.
> Similar
Wow.. great information!
Thank you very much for sharing your idea!
It definitely helped me!
JongAm Park
On Jun 30, 2011, at 2:41 PM, Quincey Morris wrote:
>
> On Jun 30, 2011, at 13:51, JongAm Park wrote:
>
>> The rationale behind "enumerator" pattern is to unify the way to access
>> collec
Is there anyway to stop an NSManagedObject from firing a fault, say because
it's actually been deleted?
For instance if an object is created on the main thread and is then punted to a
background thread and deleted (in a separate context of course) then the
changes are merged back to the main th
Dear cocoa-dev list,
I want my NSManagedObjects to retain a variable valid for the lifetime the
application instance but not between instances of the application. So I
have subclassed NSManagedObject and added an instance variable to the
NSManagedObject subclass and defined a property as follows:
Dear cocoa-dev list,
I want my NSManagedObjects to retain a variable valid for the lifetime the
application instance but not between instances of the application. So I
have subclassed NSManagedObject and added an instance variable to the
NSManagedObject subclass and defined a property as follows:
Dear cocoa-dev list,
I want my NSManagedObjects to retain a variable valid for the lifetime the
application instance but not between instances of the application. So I
have subclassed NSManagedObject and added an instance variable to the
NSManagedObject subclass and defined a property as follows:
James Merkel wrote:
Everyone doesn't approach this stuff with the same background.
We find from Kernighan and Ritchie (K&R) second edition, section
8.1 that a file descriptor is a small non-negative integer that
refers to a file and is maintained by the system.
Wikipedia is also a useful r
On Thu, Jun 30, 2011 at 7:06 PM, Greg Guerin wrote:
> James Merkel wrote:
>
>> Everyone doesn't approach this stuff with the same background.
>> We find from Kernighan and Ritchie (K&R) second edition, section 8.1 that
>> a file descriptor is a small non-negative integer that refers to a file and
On 30 Jun 2011, at 23:01, Michael Link wrote:
> Is there anyway to stop an NSManagedObject from firing a fault, say because
> it's actually been deleted?
>
> For instance if an object is created on the main thread and is then punted to
> a background thread and deleted (in a separate context o
Jeffrey Walton wrote:
Wikipedia is hardly the definitive reference. SEO comes to mind.
Luckily, I didn't say Wikipedia was a definitive reference. I said
"useful reference". And anyone at all familiar with it knows full
well that its accuracy (and usefulness) can vary widely. I, for one
Hi all,
I'm playing around a bit with AVFoundation and it seems to have all the audio
related functionality I could possibly want (playback, metadata, mixing, etc.)
but there's one thing I'm having trouble figuring out. I know how to read
metadata from a file via AVAsset's -commonMetadata meth
On Jun 30, 2011, at 3:39 PM, Jerry Krinock wrote:
> On 2011 Jun 29, at 10:11, Kyle Sluder wrote:
>
>> -[NSRunningApplication activateWithOptions:]
>
> Thank you, Kyle, that works. Indeed, in Mac OS 10.6+, the code
>
> [[NSRunningApplication currentApplication]
> activateWithOptions:NSApplicat
On Jun 30, 2011, at 3:33 PM, James Merkel wrote:
> So, my guess is that when Instruments shows an FD of -1 it refers to an FD
> that isn't mine.
What the File Activity instrument is showing in its event list is a certain
subset of system calls which operate on file descriptors. It is showing
Not to beat this subject to death, but I just realized that what Kyle
Sluder and Wlm Lewis were saying is very easy to implement.
All I need is a method that just closes the file -- one line of code.
Then wherever I was sending the -release, I need to also send a
separate -close. it could be
On Thu, Jun 30, 2011 at 6:34 PM, James Merkel wrote:
> Then wherever I was sending the -release, I need to also send a separate
> -close. it could be before or after the release, it doesn't really matter.
No, it really needs to be before the -release. When you call -release,
you relinquish your
On Jun 30, 2011, at 6:39 PM, Kyle Sluder wrote:
On Thu, Jun 30, 2011 at 6:34 PM, James Merkel
wrote:
Then wherever I was sending the -release, I need to also send a
separate
-close. it could be before or after the release, it doesn't really
matter.
No, it really needs to be before the
Can anyone give me some guidance on adding a button w/ image to a
tableview using bindings. I've had good luck adding buttons to a
tableview by dropping in a button cell. But adding the image is
giving me some problems. The image will be retrieved from the object
represented on the row of the ta
Dear All,
Now I'm developing the printer driver, and I want to realize the following
specificaiton:
1, If the current applicaiton loading my PDE is "TextEdit" or "Preview", do
actionA
2, If the current application loading my PDE is another application, do actionB.
But I don't know how to get th
Clarification: a button with an image in a tableview.
On Jul 1, 12:13 am, R wrote:
> Can anyone give me some guidance on adding a button w/ image to a
> tableview using bindings. I've had good luck adding buttons to a
> tableview by dropping in a button cell. But adding the image is
> giv
On Jun 30, 2011, at 23:13, R wrote:
> Can anyone give me some guidance on adding a button w/ image to a
> tableview using bindings. I've had good luck adding buttons to a
> tableview by dropping in a button cell. But adding the image is
> giving me some problems. The image will be retrieved fro
On Jul 1, 2011, at 12:25 AM, Chen, Jeff (SDCC) wrote:
> Is there anyone who knows this?
Haven't done it from a PDE specifically, but in general [NSBundle mainBundle]
will give you the bundle of the executing application, and you can go from
there.
--
Scott Ribe
scott_r...@elevated-dev.com
htt
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