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• Hibernate 3.5-Final in JBoss 5.1.0.GA

  - by Bozhidar Batsov

  Hibernate 3.5-Final is finally here and it offers the much anticipated JPA2 support, amongst other features. I am working on a project(EJB3 based) using JBoss 5.1.0.GA and Hibernate 3.3, but I wanted to take advantage of the JPA2 and tried to upgrade to Hibernate 3.5. What I did was fairly simple and standard - I just put all the hibernate 3.5 jars in the server/configuration(default,all,etc)/lib folder - that way they take precedence over the hibernate artifacts shipped with JBoss. It seems though that JBoss ships with libraries that are dependent on the JPA1 implementation part of the hibernate 3.3, because I started getting some errors about unimplemented abstract methods and stuff like that on deploy: 23:21:26,792 WARN [Ejb3Configuration] Persistence provider caller does not implement the EJB3 spec correctly. PersistenceUnitInfo.getNewTempClassLoader() is null. 23:21:26,792 ERROR [AbstractKernelController] Error installing to Start: name=persistence.unit:unitName=kernel-ear-3.3.0-SNAPSHOT.ear/config-persistence.jar#ConfigurationPersistenceUnit state=Create java.lang.AbstractMethodError: org.jboss.jpa.deployment.PersistenceUnitInfoImpl.getValidationMode()Ljavax/persistence/ValidationMode; at org.hibernate.ejb.Ejb3Configuration.configure(Ejb3Configuration.java:613) at org.hibernate.ejb.HibernatePersistence.createContainerEntityManagerFactory(HibernatePersistence.java:72) at org.jboss.jpa.deployment.PersistenceUnitDeployment.start(PersistenceUnitDeployment.java:301) at sun.reflect.GeneratedMethodAccessor308.invoke(Unknown Source) Maybe I should use a different persistence provided? Currently it's: org.hibernate.ejb.HibernatePersistence I looked around the net and didn't find any documented upgrade paths. There was even an unanswered question here in stack overflow on the topic. Any ideas, suggestions? Thanks in advance for your help.

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• WatiN SelectList Methods - Page not refreshing/actions not being fired after interacting with a sele

  - by Chad M

  Preface: If you don't care about the preface, skip down to the section marked "Question." Hi, Recently my company has upgraded to the latest version of WatiN for its test automation framework. We upgraded to avoid a problem where interacting with a select list would cause an ACCSES DENIED error. This error seems to be a product of the fact that our web application reloads the page it is on (which sits in a frame which sits in a frameset) with new fields after certain select lists options are selected. It could also be that our framework, which wraps around WatiN, often does actions on the same SelectList after the page refresh (I'm still looking into this, I'm new to the framework). The new version of WatiN does solve the ACCESS DENIED error, but also seems to stop select lists from firing the action that causes the page to reload w/ its new options. In fact, if you use WatiN to make the selection, the select list won't work correctly, even if manually interacted with, until the page has been forced to refresh. Question: When selecting an option in a SelectList using the newest WatiN code, the event that causes our web app's page to reload with new fields/values does not execute. What are some possibilities that could cause this? The term i've seen used most often to describe the refreshing that occurs when our select lists are used is "double post-back". Many thanks, Chad

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• Extending Programming Languages

  - by chpwn

  (Since I just posted this in another question, but my browser had to be annoying and submit it without content first, here it is again:) I'm a fan of clean code. I like my languages to be able to express what I'm trying to do, but I like the syntax to mirror that too. For example, I work on a lot of programs in Objective-C for jailbroken iPhones, which patch other code using the method_setImplementation() function of the runtime. Or, in pyobjc, I have to use the syntax UIView.initWithFrame_(), which is also pretty awful and unreadable with the way the method names are structured. In both cases, the language does not support this in syntax. I've found three basic ways that this is done: Insane macros. Take a look at this "CaptainHook", it does what I'm looking for in a usable way, but it isn't quite clean and is a major hack. There's also "Logos", which implements a very nice syntax, but is written in Perl parsing my code with a ton of regular expressions. This scares me. I like the idea of adding a %hook ClassName, but not by using regular expressions to parse C or Objective-C. Finally, there is Cycript. This is an extension to JavaScript which interfaces with the Objective-C runtime and allows you to use Objective-C style code in your JavaScript, and inject that into other processes. This is likely the cleanest as it actually uses a parser for the JavaScript, but I'm not a huge fan of that language in general. Basically, this is a two part question. Should, and how should, I create an extension to Python and Objective-C to allow me to do this? Is it worth writing a parser for my language to transform the syntax into something nicer, if it is only in a very specialized niche like this? Should I just live with the horrible syntax of the default Objective-C hooking or pyobjc?

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• Obtaining MFC Feature Pack GUI elements in .NET WinForms

  - by Cody Gray

  The MFC Feature Pack (and VS 2010) adds out-of-the-box support for several "modern" GUI elements (such as MDI with tabbed documents, the ribbon, and a Visual Studio-style interface with docking panels). These are a boon to those of us that have to support legacy MFC-based applications and want to update their look-and-feel, and a sign that Microsoft has not completely abandoned unmanaged C++ development. However, with the push so strongly in favor of .NET, WinForms, and managed code (and for plenty of good reasons), there seems little reason to develop new applications in unmanaged C++/MFC. The question then becomes how does one obtain these GUI elements in a WinForms application. Almost all of the add-ons and libraries I have found so far cost money, and introduce additional dependencies. I don't have a budget to buy third-party libraries, and the controls provided by Microsoft in MFC for free seem sufficient for our needs. But I still have reservations about learning MFC to develop a new application. Not only does the investment in time seem significant (by all accounts, MFC seems particularly difficult to learn, even for experienced .NET developers--although I am willing to try), but the question of MFC's lifespan is raised as well. Certainly, given the millions of lines of code and existing apps written in native C++, it will be around for some time, but the handwriting seems to be on the wall, so to speak, that it's no longer Microsoft's touted development platform. It seems like these features should be available by now in WinForms without the need for third-party add-ons, or devoting a lot of time and resources to custom-drawing EVERYTHING. Am I just missing something? I find very little online that compares these new features of MFC to what is available in WinForms, mainly because most everything written on MFC pre-dated its most recent update, before which it looked admitted "dated," and with its other flaws, was hardly an appealing platform for new development. With the very recent release of VS 2010, we have a while to wait before WinForms gets updated again. What routes are you guys taking for applications whose customers demand a modern-looking UI on a budget?

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• TF203015 The Item $/path/file has an incompatible pending change. While trying to unshelve.

  - by drachenstern

  I'm using Visual Studio 2010 Pro against Team Server 2010 and I had my project opened (apparently) as a solution from the repo, but I should've opened it as "web site". I found this out during compile, so I went to shelve my new changes and deleted the project from my local disk, then opened the project again from source (this time as web site) and now I can't unshelve my files. Is there any way to work around this? Did I blow something up? Do I need to do maintenance at the server? I found this question on SO #2332685 but I don't know what cache files he's talking about (I'm on XP :\ ) EDIT: Found this link after posting the question, sorry for the delay in researching, still didn't fix my problem Of course I can't find an error code for TF203015 anywhere, so no resolution either (hence my inclusion of the number in the title, yeah?) EDIT: I should probably mention that these files were never checked in in the first place. Does that matter? Can you shelve an unchecked item? Is that what I did wrong? EDIT: WHAP - FOUND IT!!! Use "Undo" on the items that don't exist because they show up in pending changes as checkins.

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• jquery Ui Dialog box opacity / alpha filter broken in IE7/8 when using jquery.effects.fade.js

  - by Ideasman101

  Greetings! Goal: transparant ui dialog box in IE7/8 with fade in/out effect upon open/close. Opacity was set in css and works just fine (safari, chrome, ff ie7/8) using native effects blind / explode etc. But when using efects.fade.js on the dialog box the opacity does not work on ie7/8 We want fade in/out because that looks awesome. Anyway here is my code. Any help much appreciated. Maybe something to do with filter or cleartype. My css .ui-dialog { position: absolute; padding: .2em; width: 300px; overflow: hidden; opacity:0.85;filter:alpha(opacity=85);} My jQuery // Dialog1 $('#dialog1').dialog({ position: [250,120], autoOpen: false, closeOnEscape: true, modal: false, show: { effect: "fade", options: {}, speed: 1500 }, hide: { effect: "fade", options: {}, speed: 1500 }, resizable: false, width: 350, height: 200 }); // Dialog Link 1 $('#dialog_link1').click(function(){ $([1,2,3]).each(function(){ var num = this; $('#dialog'+num).dialog('close'); }); $('#dialog1').dialog('open'); $('body').css("background-image", "url(images/image1.jpg)"); $('body').css("background-repeat", "no-repeat"); $('body').css("background-position", "bottom center"); $('body').css("background-attachment", "fixed"); $('body').css("bottom", "0px"); return false; });

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• Logging into StackOverflow.com and Meta.StackOverflow.com

  - by Tahir Hassan

  I have recently created a myopenid to log into stack overflow. This login works on stackoverflow.com but NOT on meta.stackoverflow.com. Why is this? This seems like it is a problem on (meta)stackoverflow's side rather than myopenid's side. When I attempt to login to meta.stackoverflow.com using myopenid login, I end up being redirected to a blank page with a very long query string. The url of the blank page is http://www.myopenid.com/server?... Secondly, my google login does not work. When I attempt to login to stackoverflow.com using my google login I end up seeing a blank page with a url beginning with http://stackoverflow.com/users/authenticate/?s... I am using Firefox 3.6.3 and I can successfully login to stackoverflow.com using myopenid but NOT with myopenid onto meta.stackoverflow.com and NOT with google onto stackoverflow.com. Please note that I would prefer to use my google login to login to stackoverflow. I only created myopenid account to get to the root of the problem. Stackoverflow should seriously consider giving users the option of having stackoverflow specific credentials because for me and I am sure countless others this openid thing don't work. (I know this should be posted in meta.stackoverflow.com but this requires a working openid, which I do not have).

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• Cannot resolve TargetName - Silverlight4 C#

  - by Redburn

  I am getting the error Cannot resolve TargetName grdGeneral. What I am trying to do is have a fade out function which accepts a grid and fades the opacity to zero. I have this function called on MouseLeftButtonDown and is loaded after the xaml and form has loaded. Calling the fade out: private void imgNext_MouseLeftButtonDown(object sender, MouseButtonEventArgs e) { fadeOut(grdGeneral); } The fade out function: private void fadeOut(Grid pGrid) { Storyboard stb = new Storyboard(); DoubleAnimation da = new DoubleAnimation(); da.From = 1.0; da.To = 0.0; stb.Duration = new Duration(TimeSpan.FromSeconds(.75)); stb.Children.Add(da); Storyboard.SetTargetName(da, pGrid.Name); Storyboard.SetTargetProperty(da, new PropertyPath(Grid.OpacityProperty)); stb.Begin(); } I have been on a handful of tutorial sites and my code seems to follow the same order. I also have been on this stackoverflow question before you say repost. That question has to deal with mutlipages and I am merely trying to start a animation. The Stack Trace System.InvalidOperationException was unhandled by user code Message=Cannot resolve TargetName grdGeneral. StackTrace: at MS.Internal.XcpImports.MethodEx(IntPtr ptr, String name, CValue[] cvData) at MS.Internal.XcpImports.MethodEx(DependencyObject obj, String name) at System.Windows.Media.Animation.Storyboard.Begin() at MeterTesting.QuarterReportGUI.fadeOut(Grid pGrid) at MeterTesting.QuarterReportGUI.imgNext_MouseLeftButtonDown(Object sender, MouseButtonEventArgs e) at MS.Internal.CoreInvokeHandler.InvokeEventHandler(Int32 typeIndex, Delegate handlerDelegate, Object sender, Object args) at MS.Internal.JoltHelper.FireEvent(IntPtr unmanagedObj, IntPtr unmanagedObjArgs, Int32 argsTypeIndex, String eventName) InnerException:

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• ExtJS GridPanel Scrollbar does not appear in IE7 but it does in Firefox, etc

  - by Snowright

  Setup I have an accordion layout containing a "properties" panel that nests two inner panels. The first inner panel holds a Ext.DataView, while the second panel is the Ext.grid.GridPanel in question. In the screenshot below, the white space containing the folder icon is the dataview, and below that is the gridpanel. Problem In Firefox, Chrome, and Opera, there is a scrollbar that appears when my gridpanel has an overflow of properties. It is only in Internet Explorer that it does not appear. I am, however, able to scroll using my mouse scroll button in all browsers, including IE. I've also tried removing our custom css file in case it was affecting it somehow, but there was no change in doing so. I'm not sure exactly what code I should show as I don't know where the exact problem is coming from but here is the code for the mainpanel and gridpanel. var mainPanel = new Ext.Panel({ id : 'main-property-panel', title : 'Properties', height : 350, autoWidth : true, tbar : [comboPropertyActions], items : [panel1] //panel1 holds the DataView }); var propertiesGrid = new Ext.grid.GridPanel({ stripeRows : true, height : mainPanel.getSize().height-iconDataView.getSize().height-mainPanel.getFrameHeight(), autoWidth : true, store : propertiesStore, cm : propertiesColumnModel }) //Add gridpanel to mainPanel mainPanel.add(propertiesGrid); mainPanel.doLayout(); Any help into the right direction would be greatly appreciated. Thank you.

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• Rails model belongs to model that belongs to model but i want to use another name

  - by Micke

  Hello. This may be a stupid question but im just starting to learn Rail thats why i am asking thsi question. I have one model called "User" which handles all the users in my community. Now i want to add a guestbook to every user. So i created a model called "user_guestbook" and inserted this into the new model: belongs_to :user and this into the user model: has_one :user_guestbook, :as => :guestbook The next thing i did was to add a new model to handle the posts inside the guestbook. I named it "guestbook_posts" and added this code into the new model: belongs_to :user_guestbook And this into the user_guestbook model: has_many :guestbook_posts, :as => :posts What i wanted to achive was to be able to fetch all the posts to a certain user by: @user = User.find(1) puts @user.guestbook.posts But it doesnt work for me. I dont know what i am doing wrong and if there is any easier way to do this please tell me so. Just to note, i have created some migrations for it to as follows: create_user_guestbook: t.integer :user_id create_guestbook_posts: t.integer :guestbook_id t.integer :from_user t.string :post Thanks in advance!

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• Adding a modal view controller when I press a info button inside a tableviewCell

  - by gvalero87

  Hi, Here is a complex question, maybe it's not hard but there are many doubts i have. First let me give you what i have. This is the only place where i've gotten good answers. I have a table view controller with custom cells. In those cells i added a button (info dark one from IB) for each one of the cells. What i would like it's that when I press that button it displays a new view with more information about that cell, different of the view that i get from didSelectRowAtIndexPath. I've read a little bit about Modal View Controller and I think this is a case where I should use it. So here are my questions: How do i make a view controller a modal view controller?. I read that i have to have a delegate. Is there an example of how to create a normal modal view controller. I haven't been able to do so. How can this button know which cell is it from?. What i have right is a subclass tableviewcell with an IBOUTLET to this info button. This is not an important question because i guess i just could add a NSIndexPath attribute. I added an action in my tableviewsubclass that is triggered when the touchDown Event is called. I did this connection through IB. How can I call the modal view controller through here?, and is it even the right place to do this? Thanks

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• Common vulnerabilities for WinForms applications

  - by David Stratton

  I'm not sure if this is on-topic or not here, but it's so specific to .NET WinForms that I believe it makes more sense here than at the Security stackexchange site. (Also, it's related strictly to secure coding, and I think it's as on-topic as any question asking about common website vulnerabiitles that I see all over the site.) For years, our team has been doing threat modeling on Website projects. Part of our template includes the OWASP Top 10 plus other well-known vulnerabilities, so that when we're doing threat modeling, we always make sure that we have a documented process to addressing each of those common vulnerabilities. Example: SQL Injection (Owasp A-1) Standard Practice Use Stored Parameterized Procedures where feasible for access to data where possible Use Parameterized Queries if Stored Procedures are not feasible. (Using a 3rd party DB that we can't modify) Escape single quotes only when the above options are not feasible Database permissions must be designed with least-privilege principle By default, users/groups have no access While developing, document the access needed to each object (Table/View/Stored Procedure) and the business need for access. [snip] At any rate, we used the OWASP Top 10 as the starting point for commonly known vulnerabilities specific to websites. (Finally to the question) On rare occasions, we develop WinForms or Windows Service applications when a web app doesn't meet the needs. I'm wondering if there is an equivalent list of commonly known security vulnerabilities for WinForms apps. Off the top of my head, I can think of a few.... SQL Injection is still a concern Buffer Overflow is normally prevented by the CLR, but is more possible if using non-managed code mixed in with managed code .NET code can be decompiled, so storing sensitive info in code, as opposed to encrypted in the app.config... Is there such a list, or even several versions of such a list, from which we can borrow to create our own? If so, where can I find it? I haven't been able to find it, but if there is one, it would be a great help to us, and also other WinForms developers.

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• Developer certificate vs purchased certificate for WCF

  - by RemotecUk

  I understsand that if I want to use authentication in WCF then I need to install a certificate on my server which WCF will use to encrypt data passing between my server and client. For development purposes I believe I can use the makecert.exe util. to make a development certificate. What is the worst that can happen if I use this certificate on the production environment? and... Why cant I use this certificate on the production environment? and ... What is the certificate actually going to do in this scenario? [Edit: Added another question] finally... In a scenario where the website has a certificate installed to provide HTTPS support can the same certificate be used for the WCF services as well? Note on my application: Its a NetTCP client and server service. The users will log in using the same username and password which they use for the website which is passed in clear text. I would be happy to pass the u/n + p/w in cleartext to WCF but this isnt allowed by the framework and a certificate must be in place. However, I dont want to buy an certificate due to budget constraints! (Sorry for the possibly stupid question but I really dont understand this so would welcome some help with this).

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• Hibernate criteria query to match against all child collection elements

  - by Andrew Harrison

  Hi, This question is very similar to link text but the responses were minimal to that question. I have a parent class with a Set of child entities. The child entities are just a wrapper for a string and live in a different table to the parent entity. I want to have a criteria query that returns the parent entities when all the members of the set of child entities return true to a condition. This condition is matching against one of a list of strings. Here's where I am: Criteria c = criteria(); Criteria ands = c.createCriteria("ands"); Disjunction dis = Restrictions.disjunction(); for (String value : values) { dis.add(Restrictions.like("value", "%" + value + "%")); } ands.add(dis); return list(c); "ands" is the set of entities with a "value" field that is a string. "criteria()" creates a criteria for the parent class. "list()" just calls criteria.list(); This is just matching against any of the elements, rather than all. Hope this makes sense. Any help much appreciated.

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• Kanban vs. Scrum

  - by Andrew Siemer

  Can someone with Kanban experience tell me how Kanban and Scrum differ? What are the pro's and con's of each of the different project management methodologies? Kanban seems to be getting a lot of press these days. I don't want to miss the hottest new way of tracking my teams failures (...and successes). Responses @S. Lott - What part of this article wasn't clear enough? infoq.com/articles/hiranabe-lean-agile-kanban/…. Do you have a more specific question? That is a great article but technically no it is not clear enough. That article gives a great amount of detail about kanban (and thank you for it...good read) but it does not specifically contrast Kanban vs. Scrum. That article will help someone like me make a decision but it most certainly won't help someone like my boss or in general someone less experienced! I was hoping for a quick overview of kanban pros and cons contrasted to scrum pros and cons. Thanks though! @S. Lott - Why do you say kanban vs. scrum? What leads you to conclude they are conflicting approaches? Can you make your question more specific? I don't think that they are necessarily conflicting. But they are different enough for a user to adhere to one over the other. Perhaps one fits a project or company better than the other? How would I sell one over the other when presenting a project management approach. Say I went to a company that was currently stuck in the rutt that is "water fall" - why would I sell one approach over the other?

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• A tool to aid completion of missing or incomplete source code documentation

  - by Pekka

  I have several finished, older PHP projects with a lot of includes that I would like to document in javadoc/phpDocumentor style. While working through each file manually and being forced to do a code review alongside the documenting would be the best thing, I am, simply out of time constraints, interested in tools to help me automate the task as much as possible. The tool I am thinking about would ideally have the following features: Parse a PHP project tree and tell me where there are undocumented files, classes, and functions/methods (i.e. elements missing the appropriate docblock comment) Provide a method to half-way easily add the missing docblocks by creating the empty structures and, ideally, opening the file in an editor (internal or external I don't care) so I can put in the description. Optional: Automatic recognition of parameter types, return values and such. But that's not really required. The language in question is PHP, though I could imagine that a C/Java tool might be able to handle PHP files after some tweaking. Looking forward to your suggestions! Bounty There are already very good suggestions for this (that I have not yet had the time to check out) to point out the gaps, but none yet providing aid in filling them. I want to give the question some more exposure, maybe there is some sort of a graphical extension to php_codesniffer to achieve the level of automation I'm dreaming of. Looking forward to any additional input!

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• Delphi Prism and LINQ to SQL / Entity Framework

  - by Vegar

  I have found many posts and examples of using LINQ-syntax in Delphi Prism (Oxygene), but I have never found anything on LINQ to SQL or Entity Framework. Is it possible to use LINQ to SQL or Entity Framework together with Prism? Where can I found such an example? Update: Olaf is giving an answer through his blog The question is now if any visual tools and code generation is provided, or if everything must be done by hand... Second update: Olaf has answered the tool/code generation-question in a comment on his site: The class designer is there, but there is no Pascal code gen. According to marc hoffman that is currently not on their list. For now you have to live with manual mapping. I guess, if you had Visual Studio (not just the VS shell), that you could add a C# library project to your solution, reference that from your Prism project. Then create the Table-Class mapping in the C# project using the visual designer. Maybe somewhat ugly, but possibly the key to get the Designer + CodeGen integrated into Prism. Who cares what language is used for the mapping . I will say this is a 1 - 0 to c# vs prism. If I did not care which language is used for the mapping - why should I care about which language is used for the rest?

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• SQLiteQueryBuilder.buildQuery not using selectArgs?

  - by user297468

  Alright, I'm trying to query a sqlite database. I was trying to be good and use the query method of SQLiteDatabase and pass in the values in the selectArgs parameter to ensure everything got properly escaped, but it wouldn't work. I never got any rows returned (no errors, either). I started getting curious about the SQL that this generated so I did some more poking around and found SQLiteQueryBuilder (and apparently Stack Overflow doesn't handle links with parentheses in them well, so I can't link to the anchor for the buildQuery method), which I assume uses the same logic to generate the SQL statement. I did this: SQLiteQueryBuilder builder = new SQLiteQueryBuilder(); builder.setTables(BarcodeDb.Barcodes.TABLE_NAME); String sql = builder.buildQuery(new String[] { BarcodeDb.Barcodes.ID, BarcodeDb.Barcodes.TIMESTAMP, BarcodeDb.Barcodes.TYPE, BarcodeDb.Barcodes.VALUE }, "? = '?' AND ? = '?'", new String[] { BarcodeDb.Barcodes.VALUE, barcode.getValue(), BarcodeDb.Barcodes.TYPE, barcode.getType()}, null, null, null, null); Log.d(tag, "Query is: " + sql); The SQL that gets logged at this point is: SELECT _id, timestamp, type, value FROM barcodes WHERE (? = '?' AND ? = '?') However, here's what the documentation for SQLiteQueryBuilder.buildQuery says about the selectAgs parameter: You may include ?s in selection, which will be replaced by the values from selectionArgs, in order that they appear in the selection. ...but it isn't working. Any ideas?

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• Jquery cycle plugin image resizing issue opera

  - by Sam Gregory

  I am using the cycle plugin within Joomla and it works fine on IE6,FF,SAFARI,CHROME however when you view it in OPERA breaking happens. It loads fine but when it brings in the next slide and every consequent slide after that it re-sizes them to what i can only assume to be the browswe window's width and height. here's my javascript <script type="text/javascript"> $('.fullScreen').cycle({ speed: 1000, timeout: 100 }); </script> css <script type="text/css"> .fullScreen { margin-left: 0px; height: 355px; clear: both; width: 475px; z-index: -1; overflow: hidden; } </script> and finally HTML <div class="fullscreen"> <img width="475px" src="images/someimage1.jpg" /> <img width="475px" src="images/someimage2.jpg" /> <img width="475px" src="images/someimage3.jpg" /> </div> hope I'm not the only one having this problem.

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• How to change image and disable UIBarButtonItem

  - by Alex

  I have a NavigationBar app with two views: a parent and a sub view. In the sub view I'm adding a button to the right corner as follows: - (void)viewDidLoad { UIBarButtonItem *tempButton = [[UIBarButtonItem alloc] initWithImage:[UIImage imageNamed:@"lock-unlocked.png"] style:UIBarButtonItemStylePlain target:self action:@selector(lockScreen)]; self.navigationItem.rightBarButtonItem = tempButton; [tempButton release]; } When that button is clicked I want to change the image of this rightBarButtonItem and disable the leftBarButtonItem (which was added automatically by the controller). Basically have two states of a button, locked and unlocked. Question 1: The only way I can find how to change the image is to create a new UIButtonItem with a new image and replace rightBarButtonItem with that new one. But I'm wondering if there's a way to just change the image without creating a new UIBarButtonItem. Am I creating a memory leak if I keep creating new UIBarButtonItem? Question 2: How can I get a hold of self.navigationItem.leftBarButtonItem and disable/enable it? I don't create that one manually, it's created automatically for me by the controller. I don't see any method/property on UIBarButtonItem to enable/disable user interaction with it.

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• Problems with MediaRecorder class setting audio source - setAudioSource() - unsupported parameter

  - by arakn0

  Hello everybody, I'm new in Android development and I have the next question/problem. I'm playing around with the MediaRecorder class to record just audio from the microphone. I'm following the steps indicated in the official site: http://developer.android.com/reference/android/media/MediaRecorder.html So I have a method that initializes and configure the MediaRecorder object in order to start recording. Here you have the code: this.mr = new MediaRecorder(); this.mr.setAudioSource(MediaRecorder.AudioSource.MIC); this.mr.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP); this.mr.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB); this.mr.setOutputFile(this.path + this.fileName); try { this.mr.prepare(); } catch (IllegalStateException e) { Log.d("Syso", e.toString()); e.printStackTrace(); } catch (IOException e) { Log.d("Syso", e.toString()); e.printStackTrace(); } When I execute this code in the simulator, thanks to logcat, I can see that the method setAudioSource(MediaRecorder.AudioSource.MIC) gives the next error (with the tag audio_ipunt) when it is called: ERROR/audio_input(34): unsupported parameter: x-pvmf/media-input-node/cap-config-interface;valtype=key_specific_value ERROR/audio_input(34): VerifyAndSetParameter failed And then when the method prepare() is called, I get the another error again: ERROR/PVOMXEncNode(34): PVMFOMXEncNode-Audio_AMRNB::DoPrepare(): Got Component OMX.PV.amrencnb handle If I start to record bycalling the method start()... I get lots of messages saying: AudioFlinger(34):RecordThread: buffer overflow Then...after stop and release,.... I can see that a file has been created, but it doesn't seem that it been well recorderd. Anway, if i try this in a real device I can record with no problems, but I CAN'T play what I just recorded. I gues that the key is in these errors that I've mentioned before. How can I fix them? Any suggestion or help?? Thanks in advanced!!

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• jQuery.ajax call to Twitter succeeds but returns null for Firefox

  - by Zhami

  I've got code that makes a simple get request to Twitter (search) using jQuery's ajax method. The code works fine on Safari, but fails on Firefox (3.6.3). In the Firefox case, my jQuery.ajax parameters 'success' method is invoked, but the supplied data is null. (In Safari, I receive a boatload of JSON data). My ajax call is: $.ajax({ url: 'http://search.twitter.com/search.json?q='+searchTerm, dataType: 'json', async: true, beforeSend: function(request) { window.console.log('starting AJAX request to get Twitter data'); }, success: function(data, textStatus, request) { window.console.log('AJAX request to get Twitter succeeded: status=' + textStatus); callback(data); }, error: function(request, status, error) { window.console.log('AJAX request to get user data --> Error: ' + status); errback(request, status, error); } }); Firebug shows Response headers: Date Sun, 11 Apr 2010 22:30:26 GMT Server hi Status 200 OK X-Served-From b021 X-Runtime 0.23841 Content-Type application/json; charset=utf-8 X-Served-By sjc1o024.prod.twitter.com X-Timeline-Cache-Hit Miss Cache-Control max-age=15, must-revalidate, max-age=300 Expires Sun, 11 Apr 2010 22:35:26 GMT Vary Accept-Encoding X-Varnish 1827846877 Age 0 Via 1.1 varnish X-Cache-Svr sjc1o024.prod.twitter.com X-Cache MISS Content-Encoding gzip Content-Length 2126 Connection close The HTTP status is OK (200), the Conetnt-Type is properly application/json, and the Content-Length of 2126 (gzip'd) implies data came back. Yet Firebug shows the Response to be empty, and a test of the supplied data shows it o be 'null.' I am aware of a similar post on Stack Overflow: http://stackoverflow.com/questions/1188976/jquery-get-function-succeeds-with-200-but-returns-no-content-in-firefox and from that would assume this problem is possibly related to cross-domain security, but... I know there are many JS widgets and whatnots that ajax get data from Twitter. Is there something I need to enable to allow this?

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• Using Windows and MMSystem in Delphi

  - by Jose Martinez

  Hi I am making a program to open and close the cd reader in which I have thought to write data to CD, the problem is the basis of the problem, which use "uses Windows 'and' uses MMSystem" but the problem is that when I use both at the same time being "uses Windows, MMSystem" gives an error and the program does not compile, I am using Delphi 2010, the strange thing is that when I use only one either Windows or MMSystem works fine and compiles. The error when I try to compile is: 'Could not find program' The code in question is this: mciSendString ('Set cdaudio door open wait', nil, 0, handle); I have two things to ask you first is how I avoid the error when using the two (Windows and MMSystem) and the other question was if he could open the CD player without using MMSystem, bone using Windows API, but not where to start The source : program Project1; {$APPTYPE CONSOLE} uses SysUtils,Windows,MMSystem; procedure opencd; begin mciSendString('Set cdaudio door open wait', nil, 0, 0); end; begin try Writeln('test'); except on E: Exception do Writeln(E.ClassName, ': ', E.Message); end; end. Image :

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• "Best" language /architecture for browser-based app with ODBC and sockets? (subjective)

  - by mawg

  Sorry to ask a subjective question, but I would welcome some advice. I am an experienced programmer of embedded s/w, but haven't done much network programming, although I have done a fair bit of hobbyist PHP. Anyway, I have to develop what is probably a fairly general type of app, as shown in this crude diagram --------------------------------------------------------------------------------- | Browser / user interface Takes input from user form and writes data to d/b. | | Also gets data and updates browser contents when when d/b contents are changed | | because of info received over TCP/IP. | |________________________________________________________________________________| | ODBC | |_______________________________________________________________________________| | database | |_______________________________________________________________________________| | ODBC | |_______________________________________________________________________________| | Socket (TCP/IP) | | Send data out when d/b is updated from browser. | | Also, update d/b when data are received over TCP/IP. | |_______________________________________________________________________________| As I say, I imagine this to be a fairly typical architecture? Am I right? Then client is insisting on MSIE - unless I can show compelling technical reasons for FireFox or other then it will have to be MSIE (are there any compelling technical reasons?). So, with MIE (almost) a given, I had though to use PHP, since I know it, but the client seems awfully keen on Java (which ought to be OK since I am conversant with C++) it woudl seem to make sense to use the same language for the "upper" interface between the web pages (which that app generates) and the d/b, and for the "lower" interface between the d/b and the socket. (a single language means a single set of tools since text approach, etc) So, the (probably highly subjective) question is "which language shoudl I choose". As I say, the client is keen on Java. Any compelling reason why not? Is it generally a good choice for the sort of thing described here? Any other hints & tips gratefully appreciated (and up-voted): URLs, books, tool chain suggestions, etc, etc

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• Is Rails Metal (& Rack) a good way to implement a high traffic web service api?

  - by Greg

  I am working on a very typical web application. The main component of the user experience is a widget that a site owner would install on their front page. Every time their front page loads, the widget talks to our server and displays some of the data that returns. So there are two components to this web application: the front end UI that the site owner uses to configure their widget the back end component that responds to the widget's web api call Previously we had all of this running in PHP. Now we are experimenting with Rails, which is fantastic for #1 (the front end UI). The question is how to do #2, the back serving of widget information, efficiently. Obviously this is much higher load than the front end, since it is called every time the front page loads on one of our clients' websites. I can see two obvious approaches: A. Parallel Stack: Set up a parallel stack that uses something other than rails (e.g. our old PHP-based approach) but accesses the same database as the front end B. Rails Metal: Use Rails Metal/Rack to bypass the Rails routing mechanism, but keep the api call responder within the Rails app My main question: Is Rails/Metal a reasonable approach for something like this? But also... Will the overhead of loading the Rails environment still be too heavy? Is there a way to get even closer to the metal with Rails, bypassing most of the environment? Will Rails/Metal performance approach the perf of a similar task on straight PHP (just looking for ballpark here)? And... Is there a 'C' option that would be much better than both A and B? That is, something before going to the lengths of C code compiled to binary and installed as an nginx or apache module? Thanks in advance for any insights.

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