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  • Passing methods/functions as args in Objective C

    - by Baishampayan Ghose
    Hello, I am new to Objective C and I am trying to implement an async library which works with callbacks. I need to figure out a way to pass callback methods as args to my async methods so that the callback can be invoked when the task is finished. What is the best way to achieve this in Objective C? In Python, for example I could easily pass a function, but in Objective C it seems selectors are the way to go(?). Can anyone point me to an example from where I can get some ideas? Thanks in advance.

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  • IE6 + IE7 CSS problem with overflow: hidden; - position: relative; combo.

    - by googletorp
    So I have created a slider for a homepage, that slides some images with a title and teaser text using jQuery. Everything works fine, and I went to check IE and found that IE 6 and 7 kills my slider css completely. I can't figure out why, but for some reason I can't hide the non active slides with overflow: hidden; I've tried tweaking the css back and forth, but haven't been able to figure out what's causing the problem. I've recreated the problem in a more isolated html page. <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="da" lang="da" dir="ltr"> <head> <style> body { width: 900px; } .column-1 { width: 500px; float: left; } .column-2 { width: 200px; float: left; } .column-3 { width: 200px; float: left; } ul { width: 2000px; left: -499px; position: relative; } li { list-style: none; display: block; float: left; } .item-list { overflow: hidden; width: 499px; } </style> </head> <body> <div class="column-1"> <div class="item-list clearfix"> <ul> <li class="first"> <div class="node-slide"> <img src="http://www.hanselman.com/blog/content/binary/lolcats-funny-pictures-leroy-jenkins.jpg" /> <div class="infobox"> <h4>Title 1</h4> <p>Teaser 1</p> </div> </div> </li> <li> <div class="slide"> <img src="http://www.hanselman.com/blog/content/binary/lolcats-funny-pictures-leroy-jenkins.jpg" /> <div class="infobox"> <h4>Title 2</h4> <p>Teaser 2</p> </div> </div> </li> <li class="last"> <div class="slide"> <img src="http://www.hanselman.com/blog/content/binary/lolcats-funny-pictures-leroy-jenkins.jpg" /> <div class="infobox"> <h4>Title 3</h4> <p>Teaser 3</p> </div> </div> </li> </ul> </div> </div> <div class="column-2"> ... </div> <div class="column-3"> ... </div> </body> </html> I've tracked down that it is the ul { position: relative; } on the ul element that is causing the overflow: hidden not to work, but why that is, I don't know. Also this is needed to make the slider javascript work using the left attribute on the ul to slide it. Any ideas as to how you can fix this is most welcome.

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  • JAXB, Netbeans and Interface Insertion Plugin

    - by segolas
    Hi, I can't get my generated classes to implements any interface. This is my xml schema file: xmlns:jxb="http://java.sun.com/xml/ns/jaxb/" xmlns:ai="http://jaxb.dev.java.net/plugin/if_insertion" jxb:extensionBindingPrefixes="ai" <xs:element name="header"> <xs:annotation> <xs:appinfo> <ai:interfaces check="1"> utility.RuleInterface </ai:interfaces> </xs:appinfo> </xs:annotation> <xs:complexType> bla bla bla </xs:complexType> I checked the "Extension" option in the JAXB options and I hav added the xjc-if-ins.jar to the "Libraries" section of my project Properties. But the generated Header class doesn't implements the utility.RuleInterface. I can figure out what am I doing wrong... Is it something missing? Any idea? regards, Segolas

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  • 'Generic' ViewModel

    - by Ian MacPherson
    Using EF 4, I have several subtypes of a 'Business' entity (customers, suppliers, haulage companies etc). They DO need to be subtypes. I am building a general viewmodel which calls into a service from which a generic repository is accessed. As I have 4 subtypes, it would be good to have a 'generic' viewmodel used for all of these. Problem is of course is that I have to call a specific type into my generic repository, for example: BusinessToRetrieve = _repository .LoadEntity<Customer>(o => o.CustomerID == customerID); It would be good to be able to call <SomethingElse>, somethingElse being one or other of the subtypes), otherwise I shall have to create 4 near identical viemodels, which seems a waste of course! The subtype entity name is available to the viewmodel but I've been unable to figure out how to make the above call convert this into a type. An issue with achieving what I want is that presumably the lambda expression being passed in wouldn't be able to resolve on a 'generic' call ?

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  • Broken pipe error in rails with memcached

    - by abronte
    I keep running into this error MemCacheError (Broken pipe): Broken pipe on my Rails app and I can't figure out why. When I access memcached via Rails.cache in my controller, the first 1 or 2 read/writes always seems to throw the broken pipe error. But when I access memcached by creating a new object, ActiveSupport::Cache::MemCacheStore.new, I don't seem to get this error. I also access memcached in another ruby process, and the first read always has this error regardless of the way I access memcached. I did implement a work around just by retrying the read but id rather have a better long term solution. Currently the only time I see this problem is after I restart memcached. I'm using Rails 2.3.5 and memcached 1.4.4 (I've also tried this with memcached 1.2.2).

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  • Learning OOP Design

    - by waiwai933
    I've read Head First Java, and I understand how OOP works. Here's my problem: I'm a PHP programmer, and while I've used OOP in PHP, I'm having trouble figuring out what should be an object and what methods to give it. For example, let's say I have a app that allows people to log in and edit a document. Why should the document be an object if there will ever only be one instance? Should I give the deleteDocument() method to the document object or the admin object? The document is the one being deleted, but the admin is the one performing the action. So my real question is, coming from a procedural background, how do I figure out what should be objects and what should have what methods?

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  • Feeding a Drill Down Menu with categories, subcategories and subSubcategories from a database

    - by Hassan
    Hi everyone, I have a Drill Down menu and I want to have it gets its elements from a database, I am using php and MySQL and the table (categories) looks like this : http://yfrog.com/jctablehsj I can't figure out how I can extract these information in a way I could put it inside the Drill Down Menu ! I found the recursive method (with LEFT JOINs) and the nested method which I barely understood and again I couldn't apply it to the Drill Down Menu. I found that some people found out a solution with left join and group by but couldn't understand or copy their example ! I would be more than gratefull if you could give me the extact of the query. Thanks a lot for your hard work, Hassan

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  • iPhone in-App email

    - by varunwg
    Hi, I am using iPhone in-App email feature to send email thru my app. The email goes fine but I am having hard time trying to figure out how to retrive email addresses to which the email was sent. MFMailComposeViewController *picker = [[MFMailComposeViewController alloc] init]; picker.mailComposeDelegate = self; [picker setSubject:@"Test"]; // Fill out the email body text NSString *emailBody = [NSString stringWithFormat:@"This is a test data"]; [picker setMessageBody:emailBody isHTML:YES]; picker.navigationBar.barStyle = UIBarStyleBlack; [self presentModalViewController:picker animated:YES]; [picker release]; Is there any way to retrive those email addresses from this function: - (void)mailComposeController:(MFMailComposeViewController*)controller didFinishWithResult:(MFMailComposeResult)result error:(NSError*)error Thanks!

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  • iPhone Advanced table view cells example

    - by Rob
    I have been going through and re-creating Apple's "Advanced Table View Cells" example to better understand everything. I have done everything, but somehow missed one detail and I can't figure it out. If you launch their example (http://developer.apple.com/iphone/library/samplecode/AdvancedTableViewCells/Introduction/Intro.html) and open up the RootViewController.xib file, they have a "tableView" outlet on the inspector that is linked to File's Owner. For whatever reason, I can't get that to show up on my version. My code is almost verbatim of Apple's, so what am I missing? Did I not declare that somewhere or doesn't that get taken from the RootViewController.m file?

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  • Excel found unreadable content in ...

    - by Rashmi Pandit
    Hi, When I open an excel file (generated through VBA code), I get an error "Excel found unreadable content in <filename>. Do you want to recover the contents?" Upon clicking yes, I get a message 'Repairs were made to PivotTable report 'pvtName' on '[filename.xls]Tab'.' The pivot table in question is generated by the VBA code. Is there a way to figure out what repairs are being done on the pivot table, so that I can make the necessary changes in the code before the file is generated? Thanks :)

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  • Prevent password leakage while using sql* loader

    - by Jai
    I have shell script calling Sql*loader utility which inturn uses username/password as arguments. This details cannot be stored on server in any form due to security related policies. i got 2 approaches to handle this situation, 1. create hidden parameter file with login details and limit the access to owner. again the implication is i cannot store login data in any format on server 2. Create the user as OS authenticated and straight away login into sql without any userid/password I am not able to figure out risks involved in 2nd approach which u experienced folks could have come across. let me know if there is any other approach to handle password leakage issue

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  • SKProductsRequest delegate methods are never called.

    - by coneybeare
    This used to work for me but is now not working anymore and I can't figure out why. I have in-app purchase setup in my app. I confirmed that I have a correct set of product identifiers, matched by corresponding in-app purchase items in itunesconnect. The call goes out to Apple view [productRequest start], but I never get a response back, despite setting the delegate to myself. What am I missing? NSLog(@"productIdentifiersSet: %@", productIdentifiersSet); if ([productIdentifiersSet count]) { SKProductsRequest *productRequest = [[SKProductsRequest alloc] initWithProductIdentifiers:productIdentifiersSet]; [productRequest setDelegate:self]; [productRequest start]; } ……… - (void)productsRequest:(SKProductsRequest *)request didReceiveResponse:(SKProductsResponse *)response { <never called> } - (void)requestDidFinish:(SKRequest *)request { <never called> } - (void)request:(SKRequest *)request didFailWithError:(NSError *)error { <never called> }

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  • Convert an array of bytes into one decimal number as a string

    - by Martin Kirsche
    I'm trying to write function that converts an arbitrary large array of bytes (larger than 64-bit) into a decimal number represented as string in c# and I simply can't figure out how to do it. For example the following code ... Console.WriteLine(ConvertToString( new byte[] { 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77, 0x88, 0x99, 0xAA, 0xBB, 0xCC, 0xDD, 0xEE, 0xFF, 0x00 })); .. should print out 22774453838368691933757882222884355840 I don't want to just use an extra library like biginteger for that, because I want it to be simple and like to understand how it works.

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  • ASP/NET MVC: Test Controllers w/Sessions? Mocking?

    - by Codewerks
    I read some of the answers on here re: testing views and controllers, and mocking, but I still can't figure out how to test an ASP.NET MVC controller that reads and sets Session values (or any other context based variables.) How do I provide a (Session) context for my test methods? Is mocking the answer? Anybody have examples? Basically, I'd like to fake a session before I call the controller method and have the controller use that session. Any ideas?

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  • How to limit NSTextField text length and keep it always upper case?

    - by carlosb
    Need to have an NSTextField with a text limit of 4 characters maximum and show always in upper case but can't figure out a good way of achieving that. I've tried to do it through a binding with a validation method but the validation only gets called when the control loses first responder and that's no good. Temporarly I made it work by observing the notification NSControlTextDidChangeNotification on the text field and having it call the method: - (void)textDidChange:(NSNotification*)notification { NSTextField* textField = [notification object]; NSString* value = [textField stringValue]; if ([value length] > 4) { [textField setStringValue:[[value uppercaseString] substringWithRange:NSMakeRange(0, 4)]]; } else { [textField setStringValue:[value uppercaseString]]; } } But this surely isn't the best way of doing it. Any better suggestion?

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  • Rotating text in postscript

    - by Mrgreen
    I have the following postscript code: /outputtext { /data exch def /rot exch def /xfont exch def /Times-Roman findfont xfont scalefont setfont /y1 exch def /x1 exch def x1 y1 moveto rot rotate data show } def % x y fontsize rotation (text) outputtext 20 300 12 0 (text1) outputtext 20 400 12 90 (text2) outputtext 20 500 12 90 (text3) outputtext 20 600 12 0 (text4) outputtext showpage The function simply outputs text based on a x, y co-ords and the text to display, there is also a variable for rotation. For some reason when I output text with a rotation of 0 degrees, all other text that comes after that will not work, I can't seem to figure out why this is the case. In the example above, 'text1' and 'text2' will display, but not 3 and 4.

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  • include_once error : failed to open stream in Boonex Dolphin v7.0.9

    - by Guillaume Pierre
    first let me say I'm a beginner in PHP, specifically PHP Object-oriented programming. I'm working on a V7.0.9 dolphin version.http://www.boonex.com/dolphin While I'm trying to include a class.php from a 3rd-part developer I work with <?php include_once ('modules/developer/configure/classes/class.php'); I get this error : Warning: include_once(modules/developer/configure/classes/ClassExample.php): failed to open stream: No such file or directory in /var/www/vhosts/mysite.com/httpdocs/dolphin/inc/classes/BxDolPageView.php(612) : eval()'d code on line 2 Warning: include_once(): Failed opening 'modules/developer/configure/classes/ClassExample.php' for inclusion (include_path='.:') in /var/www/vhosts/mysite.com/httpdocs/dolphin/inc/classes/BxDolPageView.php(612) : eval()'d code on line 2 Fatal error: Class 'ClassExample' not found in /var/www/vhosts/mysite.com/httpdocs/dolphin/inc/classes/BxDolPageView.php(612) : eval()'d code on line 6 I'm trying to figure out where is the problem... does it comes from Boonex? or is it linked to my server configuration? I really don't know where to begin to resolve... Thx in advance for your kind help if you get knowledge on it

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  • Virtual/soft buttons for (Home, menu,Back, Search) always on top?

    - by Ken
    How can I make an app or maybe service that looks like (Nexus One touch buttons) for the navigation keys (Home, menu,Back, Search) The buttons should always be visibly and always stay on top and send the command to the app thats running. Someone have ideas and sample codes how to do that? * I see an app with name (Smart Taskmanager) wich always detect when you touch the right side of the screen and then detect when you slide the finger to left. So I think its possible, with this function I think its possible to implementate the code to simulate the (Home, Meny, Back, Search) buttons. * I also see and test an app wich show a "cracked display" always ontop so that tecnic maybe shold be useful to always show the buttons/bitmanp on top. Thoose function, to show the button and catch the "touch event" and send the event to the active program, thats what i dont can figure out how to do. Thats my thought! I Hope there are some deep developer wich know this solution! Regards Ken

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  • Cost effective online consumer surveys / panels?

    - by Ed
    I am building a Windows based software targeted at consumers, and while I think it's awesome, I'm not sure if my potential customers will. I would like to do some market research to make sure I'm on the right track with the feature set. Unfortunately, I don't have the budget for a large sample size. I understand that I won't be able to get anything near statistical significance on the cheap, but some feedback is better than no feedback I figure. Are there any inexpensive resources for surveying a panel of 100-200 consumers? Thanks!

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  • Getting keyboard size from user info in Swift

    - by user3746428
    I have been trying to add some code to move my view up when the keyboard appears, however I am having issues trying to translate the Objective C examples into Swift. I have made some progress but I am stuck on one particular line. These are the two tutorials/questions I have been following: How to move content of UIViewController upwards as Keypad appears using Swift http://www.ioscreator.com/tutorials/move-view-when-keyboard-appears Here is the code I currently have: override func viewWillAppear(animated: Bool) { NSNotificationCenter.defaultCenter().addObserver(self, selector: "keyboardWillShow:", name: UIKeyboardWillShowNotification, object: nil) NSNotificationCenter.defaultCenter().addObserver(self, selector: "keyboardWillHide:", name: UIKeyboardWillHideNotification, object: nil) } override func viewWillDisappear(animated: Bool) { NSNotificationCenter.defaultCenter().removeObserver(self) } func keyboardWillShow(notification: NSNotification) { var keyboardSize = notification.userInfo(valueForKey(UIKeyboardFrameBeginUserInfoKey)) UIEdgeInsets(top: 0, left: 0, bottom: keyboardSize.height, right: 0) let frame = self.budgetEntryView.frame frame.origin.y = frame.origin.y - keyboardSize self.budgetEntryView.frame = frame } func keyboardWillHide(notification: NSNotification) { // } At the moment I am getting an error on this line: var keyboardSize = notification.userInfo(valueForKey(UIKeyboardFrameBeginUserInfoKey)) If someone could let me know what this line of code should be, I should manage to figure out the rest myself.

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  • MySQL top count({column}) with a limit

    - by Josh K
    I have a table with an ip address column. I would like to find the top five addresses which are listed. Right now I'm planning it out the following: Select all distinct ip addresses Loop through them all saying count(id) where IP='{ip}' and storing the count List the top five counts. Downsides include what if I have 500 ip addresses. That's 500 queries I have to run to figure out what are the top five. I'd like to build a query like so select ip from table where 1 order by count({distinct ip}) asc limit 5

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  • Windows Pre-commit hook for comment length Subversion

    - by coffeeaddict
    I seem to be getting nowhere with this. Either searching the web for a script, etc. Anyone got a script that you can just edit the out-of-box pre-commit.tmpl in a Windows environment that requires x chars to be entered in for a comment on commit in Tortoise Subversion globally so that all members on the team are required whereas this requirement is pushed down to the clients from SVN server? I don't know the scripting language and this should be something pretty damn simple without me taking the time to figure out scripting for the next 3 hours.

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  • Javascript callback for multiple ajax calls

    - by Jisaak
    My lack of javascript knowledge is getting me in trouble again. I think this should be a fairly easy problem to fix but I cant figure it out. Situation: I want to make three ajax calls in a click event. Each ajax call does a distinct operation and returns back data that is needed for a final callback. The calls themselves are not dependent on one another, they can all go at the same time, however I would like to have a final callback when all three are complete. $('#button').click(function() { fun1(); fun2(); fun3(); //now do something else when the requests have done their 'sucess' callbacks. }); var fun1= (function() { $.ajax({/*code*/}); }); var fun2 = (function() { $.ajax({/*code*/}); }); var fun3 = (function() { $.ajax({/*code*/}); });

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  • hierarchical clustering with gene expression matrix in python

    - by user248237
    how can I do a hierarchical clustering (in this case for gene expression data) in Python in a way that shows the matrix of gene expression values along with the dendrogram? What I mean is like the example here: http://www.mathworks.cn/access/helpdesk/help/toolbox/bioinfo/ug/a1060813239b1.html shown after bullet point 6 (Figure 1), where the dendrogram is plotted to the left of the gene expression matrix, where the rows have been reordered to reflect the clustering. How can I do this in Python using numpy/scipy or other tools? Also, is it computationally practical to do this with a matrix of about 11,000 genes, using euclidean distance as a metric? thanks.

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  • unresolved external symbol __penter referenced in function _WspiapiStrdup@4

    - by John Weldon
    I started getting this compile error after upgrading to Visual Studio 2010. Not sure if it's related, but I can't figure out what library to reference to satisfy this dependency? Is it just an API change bug or something? Microsoft (R) Program Maintenance Utility Version 10.00.30319.01 Copyright (C) Microsoft Corporation. All rights reserved. del wstest.res wstest.obj wstest.pdb wstest.ilk wstest.exe wstest.exe.manifest vc90.pdb cl -Gh -Ox -DNDEBUG -c -DCRTAPI1=_cdecl -DCRTAPI2=_cdecl -nologo -GS -D_X86_=1 -DWIN32 -D_WIN32 -W3 -D_WINNT -D_WIN32_WINNT =0x0501 -DNTDDI_VERSION=0x05010000 -D_WIN32_IE=0x0600 -DWINVER=0x0501 -D_MT -D_DLL -MDd wstest.c wstest.c link /DEBUG /DEBUGTYPE:cv -out:wstest.exe wstest.obj Ws2_32.lib Shlwapi.lib Microsoft (R) Incremental Linker Version 10.00.30319.01 Copyright (C) Microsoft Corporation. All rights reserved. wstest.obj : error LNK2019: unresolved external symbol __penter referenced in function _WspiapiStrdup@4 wstest.exe : fatal error LNK1120: 1 unresolved externals NMAKE : fatal error U1077: '"c:\program files (x86)\microsoft visual studio 10.0\vc\bin\link.EXE"' : return code '0x460' Stop.

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