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• Mouse Events lost on zoom in silverlight

  - by Ged

  Hi All, I'm running into an issue where I seem to be losing mouse events. Essentially I have a grid with a bunch of controls that get refreshed (removed/re-added via Grid.Children.Clear and Grid.Children.Add(control) ) via a WCF_Service. If I zoom in to a part of the grid where no control exists, I'm unable to zoom out. I have implemented zoom to mouse position but have logic to ensure the coordinates of the grid are never beyond the window of screen. (Eg: Grid.ActualWidth must be 0 and Translate.X must be < Grid.ActualWidth - 200) I have also experienced this where I can still see a section of one of the controls, but it still is not able to zoom out (unless I'm over the control). Appreciate any and all help.

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• ActiveRecord and transactionsin between `before_save` and `save`

  - by JP

  I have some logic in before_save whereby (only) when some conditions are met I let the new row be created with special_number equal to the maximum special_number in the database + 1. (If the conditions aren't met then I do something different, so I can't use auto-increments) My worry is that two threads acting on this database at once might pick the same special_number if the second is executed while the first is saving. Is there way to lock the database between before_save and finishing the save, but only in some cases? I know all saves are sent in transactions, will this do the job for me? def before_save if things_are_just_right # -- Issue some kind of lock? # -- self.lock? I have no idea # Pick new special_number new_special = self.class.maximum('special_number') + 1 write_attribute('special_number',new_special) else # No need to lock in this case write_attribute('special_number',some_other_number) end end

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• StructureMap DI on Model Assembly

  - by Dan dot net

  I’m new to Dependency Injection and had a question/need guidance. I had an application that used the repository pattern for data access. I used StructureMap to get the correct repository and all worked well. I have since broken out my model (including the repository logic) into its own assembly and added a service layer. In the interest of DI the service layer class takes an IRepository in its constructor. This seems wrong to me as now all consumers of my model need to know about the repository (at least configure their DI to know which one to use). I feel like that is getting into the guts of the model. What sounds wrong with this?

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• Handling out of memory errors in iPhone

  - by hgpc

  I would like to handle out of memory errors in iPhone to execute logic with lesser memory requirements in case I run of of memory. In particular, I would like to do something very similar to the followin pseudo-code: UIImage* image; try { image = [UIImage imageNamed:@"high_quality_image.png"]; } catch (OutOfMemoryException e) { image = [UIImage imageNamed:@"low_quality_image.jpg"]; } First I attempt to load a high-quality image, and if I run out of memory while doing it, then I use a lower quality image. Would this be possible?

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• One application instance for two domain name

  - by dervlap

  Hello, I have two web applications in ASP.NET which are quite the same (same business logic, same DAL, same DB scheme but different instance). The only thing that I need to change is the design (logo, color,...) and the text (global and local resource) to adress two separate business sector. We cannot "subdomain" the application because we need the two app "seems to be" independant. Is it a good idea to run only one instance for the 2 web applications. For example : I will have 2 hostnames : mycompagny.com and mycompagny2.com and I will put an HTTP Module which will set a string which will be propagated in my application like 'company' and 'company2'. I will instanciate the dal only once but the connection string will change depending on the string 'company' or 'company2'. Any pros and cons ? Any other alternatives ?

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• Java synchronizing static list ?

  - by JavaUser

  Hi, In a Java class , i am having a static list so this list is shared across all the objects of this class.The business logic in this class will run periodically which is invoked by some method with out passing instance parameters.Now I want to invoke this run method based on the list(I will add some vales into this list based on JMS) ,this list may empty sometimes and after finishing the run , i am emptying this list.Now my question is , whether I need to synchronize this list or not? Also let me know is there any other way to pass value in one object instance(Thread1) to other object instance (Thread2) other than having Static variable(static list)? Thx

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• How to include file from seperate remote folder in Netbeans (PHP Development)

  - by webworm

  I have a PHP project setup in Netbeans (v6.8) where all the PHP files are on a remote server and in a single directory. Whenever I save files locally they are updated on the remote server via SFTP. I now need to edit a remote JavaScript file to add some jQuery logic but the file is located within a different directory on the webserver. How to I add this JavaScript file such that when it is saved or updated it is transferred to it's own location on the server? When I attempt to create the file locally within NetBeans it saves to the same directory as my PHP files. I would like to be able to continue using NetBeans rather than doing this all manually using an SFTP client and a text editor. Thanks in advance.

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• Refactoring FAT client legacy application

  - by Paul

  I am working on a fat client legacy C++ application which has a lot of business logic mixed in with the presentation side of things. I want to clean things out and refactor the code out completely, so there is a clear seperation of concerns. I am looking at MVC or some other suitable design pattern in order to achieve this. I would like to get recommendations from people who have walked this road before - Do I use MVP or MVC (or another pattern)? What is/are the best practices for undertaking something like this (i.e. useful steps/checks) ?

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• AJAX Panel not throwing exceptions

  - by Grant

  Hi, i have just noticed something strange in some asp.net markup. I have a standard form with a couple of textboxes and a submit button. When clicked the code behind will attempt to perform some logic and then return. If the input values are not valid it used to throw an exception. The moment i wrapped the controls in an AJAX update panel and try to submit bad data, no exception is thrown and the panel returns like nothing was wrong. Does anyone know how to return this to the previous behavior whilst keeping the update panel?

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• Designing operation (a,b) -> (c,d)

  - by golergka

  I have an operation that I need to design. That operation takes two objects of a certain class X, and returns two new objects of the same class (I may need the originals later). The logic that dictates the selection of this object is contained in class Y. On one hand, I don't want class Y to know details about class X implementation; on the other, I don't want class X to know details about selecting the different objects to perform this operation on. If that was all the problem, I'd just create a static method on class A. However, the methods in language I'm working on return only one object. Also, the operation needs to be robust, and calling operation two times to get C and D respectively isn't possible, as both C & D both rely on a single random number. How should I design such operation? Update: I'm using Obejctive C.

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• Maintain Constant Title Across Website

  - by Jason

  If I am creating a website in ASP.NET, is it possible to programmatically set the title of the page be some predefined value with some extra information tacked on? For example: Home Page Title = Site Name Links Title = Site Name: Links Stuff Title = Site Name: Stuff Basically, whatever I defined as the main title on the page I'm currently on, I want to tack ": Name" onto the end of the title so it stays consistent across the website. I was thinking of defining it as a ContentPlaceHolder and wrapping some logic around it, but it doesn't appear to work how I thought it would (AKA, not at all).

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• Can I just release the top object (iPhone)?

  - by yar

  If I release the object that's holding a reference to the variable that I need to release, is that sufficient? Or must I release at every level of the containment hierarchy? I fear that my logic comes from working with a garbage collector for too long. For instance, I assigned to this property of a UIPickerView instance by hand instead of using IB @property(nonatomic, assign) id<UIPickerViewDelegate> delegate Since it's an assign property, I can't just release the reference after I assign it. When I finally release my UIPickerView instance, do I need to do this: [singlePicker.delegate release]; [singlePicker release]; or is the second line sufficient? Also: Are these assign properties the norm, or is that mostly for Interface Builder? I thought that retain properties were the normal thing to expect.

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• Updating external Flex components from an action

  - by Scott

  Hello, I'm new to Flex and am having trouble understanding Events. I think Events are what I want to use for my situation. I have 2 components, addUser.mxml and listUsers.mxml. I access these from a ViewStack in my main application. When I load listUsers.mxml it shows a list of current users in a datagrid via a HTTPService call. When I add a user using the form on addUser.mxml I would like the datagrid in listUsers.mxml to refresh when I return to that view to show the new user. I've tried several different things with addEventListener and dispatchEvent but can't seem to get it working. Can someone help me with this logic?

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• How do you deal with non-logical people in the workplace?

  - by unrealtrip

  I ask this because you are probably the best audience I could think of. I program for a living, and it goes hand in hand with my personality type which is likely true for most of us, as such I live and work in the world of logic and logical decisions. A problem I have is in dealing with people that live and work in a world of emotional responses and reactions that typically make no sense, or have any real bearing on any given situation. What is the trick to dealing with these people? It is nothing but an act of futility, leading to utter exasperation dealing with people like this when attempting to get them to understand some pretty basic concepts. How do you do it?

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• How to invoke a Servlet (doGet) in a web application on startup?

  - by Dan

  I need to invoke a Servlet on application startup since it contains some application initialization logic. I know I can set load-on-startup configuration, but this will only invoke Servlet’s init method. I need to invoke a doGet method and pass some Url parameters to it. Servlet doGet method expects ServletRequest and ServletResponse objects. Also, since this is clustered application, I need to know exactly what node I am accessing (since one option is just to open a socket and invoke a Servlet). What is the best option to perform this?

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• I'm maintaining a java class that's 40K lines long.. problem?

  - by Billworth Vandory

  This may be a subjective question leading to deletion but I would really like some feedback. Recently, I moved to another very large enterprise project where I work as a C++ developer. I was aghast to find most classes in the project are anywhere from 8K to 50K lines long with methods that are 1K to 8K lines long. It's mostly business logic dealing with DB tables and data management, full of conditional statements to handle the use cases. Are classes this large common in large enterprise systems? I realize without looking at the code it's hard to make a determination, but have you ever worked on a system with classes this large?

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• Dispatcher.CheckAccess() isn't working from my console application, is there a better way.

  - by zimmer62

  I wrote an application in WPF / VB and separated the business logic and UI into different projects. The business layer uses a serial port which runs on a different thread, Now that I'm trying to write a command line interface for the same business layer, it seems to fail when .Invoke() is called. (no error, just doesn't work) I'm pretty sure the reason I had to add in checkaccess and .invoke was because I have collections that would be changed during processing the serial port data and wanted the NotifyCollectionChanged to be handled by WPF data binding. (The reason I'm not 100% sure is because it was months ago I wrote that part and it all worked great from the GUI, now adding the console app has made me rethink some of this) I would like my business layer to run these processes on the thread they were created, I need this to work from both my GUI version and the command line version. Am I misusing the Dispatcher in my business layer? Is there a better way to handle an event from the serial port, and then return to the main thread to processes the data?

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• Are hashCodes unique for Strings?

  - by Batty

  Recently, I came across a piece of code, where Map<Integer, String> is used, where Integer(key) is hashCode of some string and String value corresponding to that. Is this right thing to do? Because now, equals will not be called for the String when calling get. (get is also done using hashCode() method on String object. Or, hashCode(s) are unique for unique Strings? I checked equals od String class. There is logic written for that. I am confused.

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• How can I get my app ready for the iPhone 5

  - by RazorSharp

  Apple just announced the iPhone 5 with a 4 inch screen and a 16:9 aspect ratio. Of course, they only give developers two weeks to scramble to update their apps without being able to test. I'd like to update my app for the iPhone 5's new big screen, but there's nothing on Apple's developer site about the iPhone 5 or making your apps ready for a larger screen. It would be a pain to have to write my own logic for testing whether the device is an iPhone 5 and then displaying a custom storyboard file for it. Does anyone know how the new sizing works or if there are any hidden Xcode for this?

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• PHP Framework Benefits / Downfalls

  - by Lizard

  I have been a PHP developer for about 10 years now and until about a month ago I have never used a framework. The framework I am now using due to an existing codebase is cakePHP 1.2 I can see certain benefits of the frameworks with the basic helpers like default layouts. I can definitely see the benefits of MVC keeping the logic separate etc. But the query building just seems to be bloated. Is this expected? Am I likely to be able to build better queries than the framework could build? I just feel I could get my apps running better without a framework. What are your thoughts?

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• "Teach" a computer how to do addition?

  - by ffar

  The problem is to learn computer to do addition. Computer have as input a knowladge of a numbers: he "knows" that after 1 goes 2, after 2 goes 3 and so on... Having that data computer can easyly get next number. Next, computer have knowlandge as input that x+0=x and x+(y+1)=(x+1)+y. This axioms let computer to do addition. For example, to add 5 and 3, computer makes following: 5+3 = 5+(2+1) = (5+1)+2 = 6+2 = 6+(1+1) = (6+1)+1 = 7+1 = 8. But this is too long to add numbers in such way. The problem is to develop program which can improve this way of addition using the rules of mathemetics and logic. The goal addition must executed in O(log(N)) time, not O(N) time, N is magnitude of added numbers. Have this program any science value? Is any program can do such things?

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• mySQL .NET API - Delete all data from table

  - by keynesiancross

  Hi all, I'm trying to figure out if there is an easy way to delete all the data in a table using the mySQL .NET API. The only slightly more tricky part to this is that in the C# code, the business logic can be run in both cases where there is, or isn't, data in teh table. So in some regards I almost need an If statement... Currently I am using the following code, but it doesn't seem to ever delete data... string deleteSQL = "DELETE FROM `data`.`currentData`"; MySqlCommand cmd2 = new MySqlCommand(deleteSQL, conn); Any thoughts would be much appreciated! Cheers

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• Display (tier) prices with qty increments and taxes

  - by witrin

  I need to display (tier) prices based on the qty increments of a product. E.g. a simple product, with a regular price of 50¢, no taxes and qty increments of 20 should be displayed on product views with "$10 per 20". Without using taxes this should be quite easy. But there seems to be no "default" helper or model to do this with taxes enabled and different calulation algorithms (e.g. Mage_Tax_Model_Calculation::CALC_UNIT_BASE); expect for quotes in Mage_Tax_Model_Sales_Total_Quote_Tax and Mage_Tax_Model_Sales_Total_Quote_Subtotal. Did I miss something here, or do I have to write the business logic on my own? And how I would best encapsulate it?

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• If statements Evaluations

  - by user2464795

  Using the code below I get this result even though I put in a number that is greater than 18. run: How old are you? 21 You have not reached the age of Majority yet! BUILD SUCCESSFUL (total time: 3 seconds) I am new to java and trying to self learn can anybody help? import java.util.Scanner; public class Chapter8 { /** * @param args the command line arguments */ public static void main(String[] args) { Scanner reader = new Scanner (System.in); // TODO code application logic here //Excercise 15 System.out.print("How old are you? "); int x = Integer.parseInt(reader.nextLine()); if (x > 18){ System.out.println("You have not reached the age of Majority yet!"); }else { System.out.println("You have reached the age of Majority!"); }

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• Best way to ignore less specific click event with jquery?

  - by acidzombie24

  I have the code below. The main code is in the 2nd function however the first is called which is interfering with the more specific a.One code. Whats the best way to not run code in the first function if the div i click is a .main .a.One event? $('.main .a').live('click', function () { alert('first'); //2 lines of code }); $('.main .a.One').live('click', function () { alert('second'); //lots of logic });

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