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  • MPMediaickerController memory leak identified by Leaks instrument

    - by Joe
    This is code from Apple's Addmusic example. MPMediaPickerController *picker = [[MPMediaPickerController alloc] initWithMediaTypes: MPMediaTypeMusic]; picker.delegate = self; picker.allowsPickingMultipleItems = YES; picker.prompt = NSLocalizedString (@"Add songs to play", "Prompt in media item picker"); // The media item picker uses the default UI style, so it needs a default-style // status bar to match it visually [[UIApplication sharedApplication] setStatusBarStyle: UIStatusBarStyleDefault animated: YES]; [self presentModalViewController: picker animated: YES]; [picker release]; I'm using this code in my app and the Leaks instrument highlights a leak on the line: [self presentModalViewController: picker animated: YES]; I think that this is because this line retains a reference to picker which cannot be subsequently released. Is there any way around this or is Leaks incorrectly identifying a leak?

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  • JPA query many to one association

    - by Random Joe
    I want to build the following pseudo query Select a From APDU a where a.group.id= :id group is a field in APDU class of the type APDUGroup.class. I just want to get a list of APDUs based on APDUGroup's id. How do i do that using a standard JPA query?

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  • Is locking on the requested object a bad idea?

    - by Quick Joe Smith
    Most advice on thread safety involves some variation of the following pattern: public class Thing { private static readonly object padlock = new object(); private string stuff, andNonsense; public string Stuff { get { lock (Thing.padlock) { if (this.stuff == null) this.stuff = "Threadsafe!"; } return this.stuff; } } public string AndNonsense { get { lock (Thing.padlock) { if (this.andNonsense == null) this.andNonsense = "Also threadsafe!"; } return this.andNonsense; } } // Rest of class... } In cases where the get operations are expensive and unrelated, a single locking object is unsuitable because a call to Stuff would block all calls to AndNonsense, degrading performance. And rather than create a lock object for each call, wouldn't it be better to acquire the lock on the member itself (assuming it is not something that implements SyncRoot or somesuch for that purpose? For example: public string Stuff { get { lock (this.stuff) { // Pretend that this is a very expensive operation. if (this.stuff == null) this.stuff = "Still threadsafe and good?"; } return this.stuff; } } Strangely, I have never seen this approach recommended or warned against. Am I missing something obvious?

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  • SQL Server Reporting Services Format Hours as Hours:Minutes

    - by Frank Schmitt
    I'm writing reports on SQL Server Reporting Server that have a number of hours grouped by, say, user, and a total calculated based on the sum of the values. Currently my query runs a stored proc that returns the hours as in HH:MM format, rather than decimal hours, as our users find that more intuitive. The problem occurs when I try and add up the column using an SSRS expression, because the SUM function isn't smart enough to handle adding up times in this format. Is there any way to: Display a time interval (in minutes or hours) in HH:MM format while having it calculated in decimal form? Or split up and calculate the total of the HH:MM text values to arrive at a total as an expression? I'd like to avoid having to write/run a second query just to get the total.

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  • Aggregating a list of dates to start and end date

    - by Joe Mako
    I have a list of dates and IDs, and I would like to roll them up into periods of consucitutive dates, within each ID. For a table with the columns "testid" and "pulldate" in a table called "data": | A79 | 2010-06-02 | | A79 | 2010-06-03 | | A79 | 2010-06-04 | | B72 | 2010-04-22 | | B72 | 2010-06-03 | | B72 | 2010-06-04 | | C94 | 2010-04-09 | | C94 | 2010-04-10 | | C94 | 2010-04-11 | | C94 | 2010-04-12 | | C94 | 2010-04-13 | | C94 | 2010-04-14 | | C94 | 2010-06-02 | | C94 | 2010-06-03 | | C94 | 2010-06-04 | I want to generate a table with the columns "testid", "group", "start_date", "end_date": | A79 | 1 | 2010-06-02 | 2010-06-04 | | B72 | 2 | 2010-04-22 | 2010-04-22 | | B72 | 3 | 2010-06-03 | 2010-06-04 | | C94 | 4 | 2010-04-09 | 2010-04-14 | | C94 | 5 | 2010-06-02 | 2010-06-04 | This is the the code I came up with: SELECT t2.testid, t2.group, MIN(t2.pulldate) AS start_date, MAX(t2.pulldate) AS end_date FROM(SELECT t1.pulldate, t1.testid, SUM(t1.check) OVER (ORDER BY t1.testid,t1.pulldate) AS group FROM(SELECT data.pulldate, data.testid, CASE WHEN data.testid=LAG(data.testid,1) OVER (ORDER BY data.testid,data.pulldate) AND data.pulldate=date (LAG(data.pulldate,1) OVER (PARTITION BY data.testid ORDER BY data.pulldate)) + integer '1' THEN 0 ELSE 1 END AS check FROM data ORDER BY data.testid, data.pulldate) AS t1) AS t2 GROUP BY t2.testid,t2.group ORDER BY t2.group; I use the use the LAG windowing function to compare each row to the previous, putting a 1 if I need to increment to start a new group, I then do a running sum of that column, and then aggregate to the combinations of "group" and "testid". Is there a better way to accomplish my goal, or does this operation have a name? I am using PostgreSQL 8.4

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  • Running Cargo From Maven antrun Plugin

    - by Frank
    I have a maven (multi-module) project creating some WAR and EAR files for JBoss AS 7.1.x. For one purpose, I need to deploy one generated EAR file of one module to a fresh JBoss instance and run it, call some REST web service calls against it and stop JBoss. Then I need to package the results of these calls that were written to the database. Currently, I am trying to use CARGO and the maven ant run plugin to perform this task. Unfortunately, I cannot get the three (maven, ant run and CARGO) to play together. I don't have the uberjar that is used in the ant examples of cargo. How can I configure the ant run task so that the cargo ant task can create, start, deploy my JBoss? Ideally the one unpacked and configured by the cargo-maven2-plugin in another phase? Or, is there a better way to achieve my goal of creating the database? I cannot really use the integration-test phase, as it is executed after the package phase. So, I plan to do it all in compile phase using antrun.

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  • Howto: Access a second related model in a nested attribute builder block

    - by Joe Cairns
    I have a basic has_many through relationship: class Foo < ActiveRecord::Base has_many :bars, :dependent => :destroy has_many :wtfs :through => :bars accepts_nested_attributes_for :bars, :wtfs end On my crud forms I have a builder block for the wtf, but I need the label to come from the bar (an attribute called label for instance). What's the proper method to do this? Here's the most simple scaffold: <h1>New foo</h1> <% form_for(@foo) do |f| %> <%= f.error_messages %> <p> <%= f.label :name %><br /> <%= f.text_field :name %> </p> <h2>Bars</h2> <% f.fields_for :wtfs do |builder| %> <%= builder.hidden_field :bar_id %> <p> <%= builder.text_field :wtf_data_i_need_to_set %> </p> <% end %> <p> <%= f.submit 'Create' %> </p> <% end %> <%= link_to 'Back', foos_path %>

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  • casting vs using the 'as' keyword in the CLR

    - by Frank V
    I'm learning about design patterns and because of that I've ended using a lot of interfaces. One of my "goals" is to program to an interface, not an implementation. What I've found is that I'm doing a lot of casting or object type conversion. What I'd like to know is if there is a difference between these two methods of conversion: public interface IMyInterface { void AMethod(); } public class MyClass : IMyInterface { public void AMethod() { //Do work } // other helper methods.... } public class Implementation { IMyInterface _MyObj; MyClass _myCls1; MyClass _myCls2; public Implementation() { _MyObj = new MyClass(); // What is the difference here: _myCls1 = (MyClass)_MyObj; _myCls2 = (_MyObj as MyClass); } } If there is a difference, is there a cost difference or how does this affect my program? Hopefully this makes sense. Sorry for the bad example; it is all I could think of... Update: What is "in general" the preferred method? (I had a question similar to this posted in the 'answers'. I moved it up here at the suggestion of Michael Haren. Also, I want to thank everyone who's provided insight and perspective on my question.

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  • Simplifying loop in Objective-C

    - by Joe Habadas
    I have this enormous loop in my code (not by choice), because I can't seem to make it work any other way. If there's some way make this simple as opposed to me repeating it +20 times that would be great, thanks. for (NSUInteger i = 0; i < 20; i++) { if (a[0] == 0xFF || b[i] == a[0]) { c[0] = b[i]; if (d[0] == 0xFF) { d[0] = c[0]; } ... below repeats +18 more times with [i+2,3,4,etc] ... if (a[1] == 0xFF || b[i + 1] == a[1]) { c[1] = b[i + 1]; if (d[1] == 0xFF) { d[1] = c[1]; } ... when it reaches the last one it calls a method ... [self doSomething]; continue; i += 19; ... then } repeats +19 times (to close things)... } } } I've tried almost every possible combo of things that I know of attempting to make this smaller and efficient. Take a look at my flow chart — pretty huh? i'm not a madman, honest.

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  • c# convert file from one format to another

    - by JOE SKEET
    i have a bunch of files that need to be converted. the beginning files look like this: Well ID,Error code,Sample Barcode A1,0,THC_CAL1 B1,0,THC_CAL2 C1,1,THC_CAL3 D1,0,THC_CAL4 E1,0,THC_QC1 F1,0,THC_QC2 G1,0,THC_QC3 H1,0,THC_QC4 A2,0,BLANK0609 B2,0,AA178121 C2,0,CC37815 D2,0,BLANK0610 E2,0,CC37819 F2,0,N150680 G2,0,BLANK0611 H2,0,AA127900 A3,0,AA26940 B3,0,BLANK0612 ........... the output needs to look like this: A01 THC_CAL1 B01 THC_CAL2 D01 THC_CAL4 //please note that c1 is gone since it did not have a 0 in the middle column E01 THC_QC1 F01 THC_QC2 G01 THC_QC3 H01 THC_QC4 A02 BLANK0609 B02 AA178121 C02 CC37815 D02 BLANK0610 E02 CC37819 F02 N150680 G02 BLANK0611 H02 AA127900 A03 AA26940 B03 BLANK0612 H10 BLANK0234 //please notice that there is H10 and not H010 what would be the best way to read this file into a variable and then output this into a new file? should i read it line by line or should i read it into a datatable?

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  • Microsoft JScript runtime error: ASPx is undefined

    - by Joe
    I'm getting this error all over the place in my web application and trying to figure out why. The error is always for some control, ASPxClientTextBox for example. So far the only thing I've found as a potential fix is to check the httphandlers section of the .net web.config (the one in C:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\CONFIG\web.config) and make sure an entry for "WebResource.axd" exists, which it does. Any idea's what's going on or where I should look?

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  • cURL cookie negative cookie expire

    - by Joe Doe
    I have problems with cookies with cURL. After problems I turned on verbose function and figured out cURL sets them negative expire date even if server sends positive date. Example: * Added cookie _c_sess=""test"" for domain test.com, path /, expire -1630024962 < Set-Cookie: _c_sess="test"; Domain=test.com; HttpOnly; expires=Mon, 26-Mar-2012 14:52:47 GMT; Max-Age=1332773567; Path=/ As you can see both expires and max-age are positive, but cURL sets expire to negative value. Somebody has idea? EDIT: Here is php code I use. $ch = curl_init(); curl_setopt($ch, CURLOPT_URL, "http://site.com/"); curl_setopt($ch, CURLOPT_USERAGENT, 'Mozilla/5.0 (Windows NT 6.1; rv:11.0) Gecko/20100101 Firefox/11.0'); curl_setopt($ch, CURLOPT_COOKIEJAR, $cookiepath); curl_setopt($ch, CURLOPT_COOKIEFILE, $cookiepath); curl_setopt($ch, CURLOPT_HEADER ,1); curl_setopt($ch, CURLOPT_VERBOSE ,1); curl_setopt($ch, CURLOPT_STDERR ,$f); curl_setopt($ch, CURLOPT_RETURNTRANSFER ,1); curl_setopt($ch, CURLOPT_FOLLOWLOCATION ,1); curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, 0); $data = curl_exec($ch); Data from cookie jar: #HttpOnly_.test.com TRUE / FALSE -1630016318 _test_sess "test"

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  • What is an alternative for split in Perl?

    - by joe
    My file contains a: b d: e f: a:b:c g: a b c d f:g:h h: d d:dd:d J: g,j How can I parse this file into lefthand side values into one array and right hand side to another array? I tried with split, but I am not able to get it back. I want to store them into hash.

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  • Problem with derived ControlTemplates in WPF

    - by Frank Fella
    The following xaml code works: <Window x:Class="DerivedTemplateBug.Window1" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:local="clr-namespace:DerivedTemplateBug" Title="Window1" Height="300" Width="300"> <Button> <Button.Template> <ControlTemplate> <Border BorderBrush="Black" BorderThickness="2"> <TextBlock>Testing!</TextBlock> </Border> </ControlTemplate> </Button.Template> </Button> </Window> Now, if you define the following data template: using System.Windows.Controls; namespace DerivedTemplateBug { public class DerivedTemplate : ControlTemplate { } } And then swap the ControlTemplate for the derived class: <Window x:Class="DerivedTemplateBug.Window1" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:local="clr-namespace:DerivedTemplateBug" Title="Window1" Height="300" Width="300"> <Button> <Button.Template> <local:DerivedTemplate> <Border BorderBrush="Black" BorderThickness="2"> <TextBlock>Testing!</TextBlock> </Border> </local:DerivedTemplate> </Button.Template> </Button> </Window> You get the following error: Invalid ContentPropertyAttribute on type 'DerivedTemplateBug.DerivedTemplate', property 'Content' not found. Can anyone tell me why this is the case?

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  • Set Hudson build number from a script

    - by Joe Schneider
    Is there a way to set the next build number in Hudson from a script? I have the nextBuildNumber plug-in installed, and attempted to use wget with --post-data, but that page appears to require login. I have two steps of a chained build and I want to keep the build numbers in sync.

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