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• Drawing rubber band line during user drag

  - by Pete W

  In my iPhone app, I would like the user to be able to "connect" two of my views by: 1) starting a drag in View A 2) as they drag towards View B, a straight line with one end in View A and the other end under at the current drag point, animates in a rubber-band fashion 3) when/if they release in View B, the line is then shown between the two views I've seen examples of dragging and dropping views, and other examples of animations, but I haven't seen one that is a simple example of this kind of user-directed animation. Any pointers towards examples or the specific docs I should be looking at would be appreciated. If this turns out to be trivial - my apologies. Although I've done quite a bit of development, I'm just getting started in the iPhone SDK and Core Graphics.

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• In Grails, How can I create a domain model to link two of another model?

  - by gerges

  Hey all, I'm currently trying to create a Friendship domain object to link two User objects (with a bit of additional data: createDate, confirmedStatus). My domain model looks as follows class Friendship { User userOne User userTwo Boolean confirmed Date createDate Date lastModifiedDate static belongsTo = [userOne:User , userTwo:User] static constraints = { userOne() userTwo() confirmed() createDate() lastModifiedDate() } } I've also added the following entries to the user class static hasMany = [ friendships:Friendship ] static mappedBy = [ friendships:'userOne' , friendships:'userTwo' ] When I do this, the result is a new friendship created (and viewable through the controller) with both users listed in their respective places. When I view the details of userOne, I see the friedship listed. When I view the details of userTwo, no friendship is listed. This is not the behavior I expected. What am I doing incorrectly? Why can't I see the friendship listed under both users?

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• C++: Get char after space character instead or return carriage.

  - by Kzone272

  Okay this is similar to my last question but what I ended up doing was way too complex for something as simple as this. I simply need to get a single character or number (I will know which of these I am receiving) from the console after I press space, instead of pressing enter. I'm sure there must be a way to have the terminal read input after a space instead of a '\n'. I need to read inputs from the console in which the succeeding data types will vary depending on what the first input is, and I think reading the entire line, parsing it into strings, then parsing some of those into ints is a bit unnecessary. So Is this actually not possible in C++ or have I just not found it yet?

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• Drupal does not recognize my website has been installed

  - by Marcos Buarque

  After a successful Drupal install, I was trying to follow the security recommendations and reverted the settings.php file to 444 permissions (read, read, read). Then, all of a sudden, right after doing that, Drupal does not recognize the installation process was completed. It went back to the install screen. Worst of all. I did chmod back to 666 (write, write, write) but it does not work any more. When I move forward as if I was going to install Drupal again, he tells me he does not have permissions to create the files folder under sites/default... But since the installation has already been completed... the files folder is already there... I am puzzled... Could it be some sort of server caching? Since this is one of my first adventures with a Linux server, I am a bit confused. Any help appreciated... Thanks.

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• Need a push in the right direction, to write my first functional test in Rails

  - by Jason

  I've read quiet a bit of documentation over the last few days about testing in Rails, I'm sitting down to write my first real test and not 100% sure how to tie what I have learned together to achieve the following functional test (testing a controller) I need to send a GET request to a URL and pass 3 parameters (simple web-service), if the functionality works the keyword true is simply returned, otherwise the keyword false is returned - its in only value returned & not contained in any <div>, <span> or other tags. The test should assert that if "true" is returned the test is successful. This is probably very simple so apologies for such a non-challenging question. If anyone could point me in the write direction on how I can get started, particularly how I can test the response, I'd be very grateful!

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• 2 or more Controls only 1 is considered Active

  - by Don

  I have 2 controls (MyCtrl) next to each other called ctrlLeft and ctrlRight. Whenever one receives interaction it is considered active (by default the left one). I override OnDraw and customize the look of the active one a bit. Currently I have a property Active and an event that I subscribe to from all MyCtrl in there I store a reference to the active one like this: if (sender is MyCtrl) { ctrlActive = (sender as MyCtrl); ctrlLeft.Active = !(ctrlRight.Active = (ctrlActive == ctrlRight)); } Either way I need to have ctrlActive as I use it for other things but what I am wondering is if this is the best way make them aware of each other? Another option I thought of was to store references to every possible MyCtrl and then loop through em all and activate / deactivate the one that match sender just in case I in the future add a ctrlMiddle. Are my thoughts wrong, is there better options to do this. For example, how does radiobuttons accomplish their similar functionality?

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• Optimum php.ini and my.cnf settings for a small Drupal 7 site on a virtual server

  - by the other dude

  I looking for advice on how to set up the default configuration of php.ini and my.cnf for a small site (100 pages) with very little traffic (300 visitors per day). All pages have a bit of text, some images, no video, no audio, no flash/silverlight, very little javascript and jquery. For tracking I'm using GA and Piwik. The main site database is around 50MB. The site is hosted on a virtual server with 20GB RAM and 6 vCPUs so there's hopefully a lot of muscle to make it run very fast. I don't know much about tweaking php and mysql settings and would appreciate it if your answers can be as detailed as possible. Thanks

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• Which programming language is easiest to get a junior position in?

  - by markle976

  I do not have a CS degree but I have lots of intermediate experience with many languages (PHP, C#, Objective-C, Java, VBScript, Actionscript, Javascript, Ruby, etc), mostly freelance or pastime. I have a little experience with Linux (Ubuntu), and a decent bit with Windows. When I look at different languages I find that am interested in most (except maybe VB), but I am not sure what to focus on. So what would be the easiest language to get a job in? Java? PHP? Or would it be easier to get a job as a Junior DBA if I learned Oracle or SQL Server in my spare time?

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• Security for web services only used from a Silverlight application?

  - by Lasse V. Karlsen

  I have googled a bit for how I should handle security in a web service application when the application is basically the data repository for a Silverlight application, but have gotten inconclusive results. The Silverlight application is not supposed to have its own user authentication, since it will be reachable only through a web application that the user have already authenticated to get into. As such, I was thinking I could simply add a parameter to the SL application that is a cookie-type value, with a certain lifetime, linked to the user in the database. The SL application would then have to pass this value alongside other parameters to the web services. Since the web service is hopefully going to be a generic web service endpoint, few methods, adding an extra parameter at this level will not be a problem. But, am I supposed to roll this system on my own? It sounds to me as this isn't exactly new features that nobody has considered before, so what are my options?

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• column formatting in flash 8 datagrid

  - by eventdave

  I have a datagrid in flash 8 that has an array as a data provider. One of the items in the array is a number, which represents an amount of money. So I iterate through the array and create a new item "amountFormatted" in each line of the array. For example I have a value of 10 and a formatted value of £10.00 in the array. This formatted value then appears in the datagrid. This seems a little cumbersome and I wondered if there was a way to set some automatic function so that the column in the datagrid is automatically formatted. a bit like an excel column can have formatting applied to it. I hope that is clear, thanks for any response.

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• "Cannot use fixed local inside lambda expression"

  - by JulianR

  I have an XNA 3.0 project that compiled just fine in VS2008, but that gives compile errors in VS2010 (with XNA 4.0 CTP). The error: Cannot use fixed local 'depthPtr' inside an anonymous method, lambda expression, or query expression depthPtr is a fixed float* into an array, that is used inside a Parallel.For lambda expression from System.Threading. As I said, this compiled and ran just fine on VS2008, but it does not on VS2010, even when targeting .NET 3.5. Has this changed in .NET 4.0, and even so, shouldn't it still compile when I choose .NET 3.5 as the target framework? Searching for the term "Cannot use fixed local" yields exactly one (useless) result, both in Google and Bing. If this has changed, what is the reason for this? I can imagine capturing a fixed pointer-type in a closure could get a bit weird, is that why? So I'm guessing this is bad practice? And before anyone asks: no, the use of pointers is not absolutely critical here. I would still like to know though :)

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• Is Visual Studio Tools for Applications part of Office 2007?

  - by BlackMael

  The VSTO bit I understand. Visual Studio has the project templates to get you started with creating nice .NET based add-ins. But where is VSTA? I installed the SDK but it seems to be gears towards adding extensibility to your own applications. I had thought that VSTA was like the new VBA for Office 2007. Infopath 2007 seems to be VSTA enabled but I cannot seem to find where Excel 2007 is also VSTA enabled. Am I missing something?

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• JPA EclipseLink Auditing for Oracle issue with SessionCustomizer...

  - by enrique

  I was trying to use the SessionCustomizer for auditing with v$session.program for oracle and it works with JDBC but i need it working with JPA, so i read a bit more the documentation for SESSION_CUSTOMIZER in this site: http://wiki.eclipse.org/Using_EclipseLink_JPA_Extensions_(ELUG)#EclipseLink_JPA_Persistence_Unit_Properties_for_Customization_and_Validation but had not lucky in making it work in passing the program name parameter to oracle with the v$session.program... i was using the SessionCustomizer and it is an interface so my code is as follows: package com.util; import org.eclipse.persistence.config.SessionCustomizer; import org.eclipse.persistence.sessions.Session; /** * * @author xkalibur */ public class ProgramCustomizer implements SessionCustomizer{ public void customize(Session s) throws Exception { s.getDatasourceLogin().setProperty("v$session.program","Customers"); } } then in CustomerFacade : ProgramCustomizer pc=new ProgramCustomizer(); public void edit(Customer customer) { emProperties.put(PersistenceUnitProperties.SESSION_CUSTOMIZER,pc); em=factory.createEntityManager(emProperties); em.merge(customer); } and returns the following error: javax.ejb.EJBException Caused by: java.lang.NullPointerException at com.facades.CustomerFacade.edit(CustomerFacade.java:48) please some help...

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• When to rewrite vs. upgrade?

  - by MrGumbe

  All custom legacy software needs changing, or so say our users. Sometimes they want a feature or two added and all that is necessary to change a bit of code, add a control, or some other minor upgrade task. Sometimes they want to ditch their error-prone VB5 desktop solution and rewrite the whole thing as a rich Web 2.0 ASP.NET MVC application. More often, however, the scope of changes to legacy functionality lies somewhere between these two extremes. What rules of thumb to you use to decide whether you should upgrade an existing application or start from scratch?

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• Map generics in Java

  - by Amir Rachum

  Hi all, I seem to have a bit of misunderstanding with Java Generics and I hope you can help me. I tried to create a map like so: Map<Debater, int> (Debater is an Interface I declared) but java complained about the int, so I did: Map<Debater, Integer> I suppose it's because int is not a class while Integer is, is this correct? Also, Now I get a Debater and I need to add 1 to its value in the map. How do I do that?

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• C# gridview nested in repeater update

  - by Padawan

  My current situation is to display an unknown number of Plantypes and within those Plantypes display a list of Participants(also unknown number), the participants have a textbox and a dropdown that is editable (you can't edit the individual rows, there is one update that does a bit of validation then updates all rows.) I currently have a gridview nested withing a repeater, the repeater displays the Plan in a label and OnItemDataBound I call a method to populate the gridviews. It looks great, but I can't figure out how to save all the data at once. I'm not opposed to handling this a different way, as in loose the gridview and or repeater, if someone has a better idea. This is C# and framework 2.0...there is no sorting or paging on the gridviews...just some links and the fields to update. thanks in advance, Padawan

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• Interface with inner implementation - good or bad

  - by dermoritz

  I am working on a project with many someInterface - someInterfaceImpl-pairs. Some days ago I got the idea (probably inspired by reading some objective c code) to include the default implementations as an inner class. Now some colleagues (all with much more java experience than me) saw this idea - feedback was between shocked and surprised ("this is working?"). I googled around a bit but didn't find much evidence of usefulness of this "pattern" (personal i like it): pdf-paper and a faq about code style What do you think - especially in those cases where an "default" implementation is tightly coupled to an interface. Update i just found this: Java Interface-Implementation Pair (see accepted answer)

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• Minimizing Java Thread Context Switching Overhead

  - by binil

  I have a Java application running on Sun 1.6 32-bit VM/Solaris 10 (x86)/Nahelem 8-core(2 threads per core). A specific usecase in the application is to respond to some external message. In my performance test environment, when I prepare and send the response in the same thread that receives the external input, I get about 50 us advantage than when I hand off the message to a separate thread to send the response. I use a ThreadPoolExecutor with a SynchronousQueue to do the handoff. In your experience what is the acceptable delay between scheduling a task to a thread pool and it getting picked up for execution? What ideas had worked for you in the past to try improve this?

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• xcopy not accepting a relative path as source parameter on certain computers

  - by slicedtoad

  xcopy /e /q ".\dlls\*.*" "%programfiles(x86)%\foo" >> TEMP xcopy /e /q dlls "%programfiles(x86)%\foo" >> TEMP xcopy /e /q ".\dlls" "%programfiles(x86)%\foo" >> TEMP All of the above work on two of my machines (windows 7 64bit). But on two peers' laptops (windows 7 64 bit and windows 8 64bit) they return file dlls not found or (in the case of the first one) file *.* not found Can someone shed some light here? The only difference I can see between the machines is possibly permissions. But I don't see how that would affect xcopy's ability to recognize a local path.

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• SharePoint: The template you have chosen is invalid or cannot be found

  - by user231976

  Exception in frmMPInstall.CreateSite: Microsoft.SharePoint.SPException: The template you have chosen is invalid or cannot be found. --- System.Runtime.InteropServices.COMException (0x81071E44): The template you have chosen is invalid or cannot be found. at Microsoft.SharePoint.Library.SPRequestInternalClass.ApplyWebTemplate(String bstrUrl, String& bstrWebTemplate, Int32& plWebTemplateId) at Microsoft.SharePoint.Library.SPRequest.ApplyWebTemplate(String bstrUrl, String& bstrWebTemplate, Int32& plWebTemplateId) --- End of inner exception stack trace At the time of Deploying the solution.It shows above error . It happed only in 64 bit processer. How to solve this problem help me please thanks.

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• Is it me or is developing web based data entry GUIs a big pain?

  - by GregH

  Maybe it's me or maybe it isn't. I don't have a huge amount of experience of developing web based data entry software but do have some. I used to do it quite a bit years ago. Used to use Oracle Forms, Visual Studio, various 4th generation languages, and performing the user interface layout used to be a snap. Now doing the user interface for developing web applications seems to be a huge pain in the rear. Just trying to get text entry fields and widgets to go where they are supposed to go on the screen is a total pain. You have to know Javascript, CSS, JQuery, HTML, etc. There must be an easier way to develop data entry forms that produce the needed underlying code for a web page. Maybe I'm just not looking in the right place. There must be some WYSIWYG GUI development tools for the web for developing data entry forms out there. Anybody know of any?

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• LINQ saving images to varbinary

  - by m4rc

  I'm having issues saving images to a varbinary(Max) field using LINQ. I can save files in the region of 10KB to the database no problems, but when it comes to files bigger than that, it's as though it doesn't even try. I've had a look in the SQL Server Profiler and when the file is around 10KB I can see the full insert statement in the detail pane. However, when the file is a bit bigger, the detail pane doesn't show anything, although any data besides the varbinary field is written to the database. The data is in the Data Object just before SubmitChanges so I can't figure out what's happening between now and then!

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• iPhone MVC Question

  - by HM1

  Hi, I'm bit of a newbie and had a basic question regarding adhering to the MVC model in iPhone coding. How do I setup a Model class that holds my data and connect it to different controllers in the following setup: Using Interface Builder, I created a tab controller in which - Tab #1 has a Nav Controller and a hierarchy of View Controllers. - Tab #2 has a View Controller So with what I have now, the View Controller under Tab #1 alloc init's the model class and I know how to pass the model from one ViewController to the next in the Navigation Hierarchy where it can pass the data and/or be updated with new data. Question is how to pass it from Tab #1's View Controller to Tab #2 View Controller as there is no code linking the two??? Thanks in advance, Hiren.

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• Does ASP.NET Make Request Scheduling Decisions Based Upon SessionID?

  - by Mike Murphy

  I know that a properly implemented SessionStateStoreProvider maintains an exclusive lock on session data for the duration of a request. However, considering that multiple requests could arrive simultaneously (e.g. via IFRAMEs) all but one would be able to make forward progress. All the other requests would block for a bit and reduce the number of worker threads available during that time. It seems if ASP.NET "peeked" at the session IDs on the requests early on, it could avoid running requests simultaneously that were on the same session. This would improve throughput under load for pages that didn't want to give up using IFRAMEs. This seems plausible enough that it might be true.

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• C# programmer - necessary to learn C/C++?

  - by Kurresmack

  Hey, I have been programming now for a couple of years. But never any low level language. I started off with some java and some VB. Then I went over to VB.NET and now for a while I have been writing C#. As you see, I have never written any low level language where I had to deal with memory management. Is this something I should do, like a route of passage that every programmer should go through? I am a bit keen on trying to perhaps writing in assembler directly. This would suit me personally good as I have 2 parents that have been writing assembler for ages. Is it necessary for a professional programmer these days to know how to manually manage memory?

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