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• Validationattribute only when value is changed?

  - by boris callens

  I want to write a custom ValidationAttribute that checks if the given value is unique or not. The problem is that in the edit screen, it is not guaranteed that the user actually changed the value, resulting in a false error. Is there a way to check in my attribute whether the value actually changed? Or can I trigger the attribute only when the value has changed? I'm getting the feeling this requirement maybe just doesn't belong in an attribute?

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• Google App Engine getting verbose_name of a property from an instance

  - by Brian M. Hunt

  Given a model likeso: from google.appengine.ext import db class X(db.Model): p = db.StringProperty(verbose_name="Like p, but more modern.") How does one access verbose_name from x=X() (an instance of X)? One might expect that x.p.verbose_name would work, or alternatively x.properties()['p'].verbose_name, but neither seems to work. Thanks! EDIT: x.name.verbose_name = x.p.verbose_name

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• Freelance Apple Mac Development

  - by morgs

  I'm looking to contract with a freelance Apple Mac developer to write a custom application for me. Can anyone point me in the direction of any good Apple Mac developers in the UK or Internationally or websites where I can upload my project requirements and obtain quotes? Thanks in advance!

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• autoexp.dat does not seem to take affect in Visual Studio C++ 2005 debugger.

  - by Pradyot

  autoexp.dat does not seem to take affect in Visual Studio C++ 2005 debugger. I am not trying to add any custom rules. Just want commonly used stuff like stl::string, to display in a friendlier manner. Does anyone know. how I can accomplish this? Is this just question of specifying a path to the autoexp.dat file somewhere. The file is available under the Visual Studio installation directory.

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• can a .class file be added to the urlpath of a URLClassLoader

  - by java_geek

  I have a custom class loader which extends from a URLClassLoader. I added a .class file to the urlpath using addURL(); but when i do a class.forname() using this loader i get a ClassNotFoundException. However, if i create a jar and add the jar to the urlpath, i do not get any exception. What can be added to the urlpath of a URLClassLoader usign addURL()

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• Is there a good .Net CSS aggregator that combines style sheets and minifies them?

  - by vfilby

  I am looking to see if there is an open source/free project that provides a CSS manager. I am looking for this mainly for performance tweaking and hoping there is a readymade project rather than building from scratch. Features I am looking for include: Combines multiple .css files into a single css file Optionally minifies the resulting .css file Works well with .Net (a user control, custom handler, etc) Is there a project out that that handles this?

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• How to get a single widget to set 2 fields in Django?

  - by kender

  Hi, I got a model with 2 fields: latitude and longitude. Right now they're 2 CharFields, but I want to make a custom widget to set it in admin - was thinking about displaying Google Maps, then getting the coordinates of the marker. But can I have 1 widget (a single map) to set 2 different fields?

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• Implement animation in UIButton

  - by sasayins

  I'm new to cocoa and iphone programming and I want to implement an animation in UIButton. For example, I create a custom UIButton with a square image. Then when I press that UIButton, the square image will flip. Note that the square image is the image of the UIButton. [UIButton setImage:[UIImage imageNamed:@"square.png"]];

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• Using @Resource to load environment entries

  - by a1ex07

  Hi, I'm trying to load bean runtime configuration. @Stateless public class MyBean implements MyLocal{ @Resource String runtimeSetting1="default_value"; //.... } I cannot find out how to create custom resource on app server side (Glassfish) - I have no idea what I should enter in "Factory Class" field. Maybe there is a better way of loading configuration... Thanks.

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• How are neural networks used when the number of inputs could be variable?

  - by Jeremy E

  All the examples I have seen of neural networks are for a fixed set of inputs which works good for images and fixed length data. How do you deal with variable length data such sentances, queries or source code. Is there a way to encode variable length data into fixed length inputs and still get the generalization properties of neural networks? Thanks

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• How to analyze PermGen contents?

  - by Daniel

  I want to get a dump of the PermGen to see why it is filling. Is there a way to analyze this? I already know about the common suspects like log4j, tomcat webapp reloading etc, but I have some custom proxy generation code in my application, too, and just want to look under the hood. Is this possible somehow?

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• BetterAuthorizationSample prompt not changing

  - by Nano8Blazex

  I'm using BAS in a Cocoa app with a custom prompt for admin password... But now I want to change the prompt. I changed it in the strings file and it doesn't change. I rebuilt everything and deleted the sockets in /var/run and the launchdaemon and privelegedhelpertools folders. But the prompt just won't change!!! Help?

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• How to access xmlParserCtxt structure from within xmlSAXHandler callbacks?

  - by Lux In Tenebris

  I'm parsing (X)HTML pages content with libxml using the following call: htmlDocPtr doc = htmlSAXParseDoc(content, NULL, &html_handler, NULL); But for debugging purposes I need to analyze some of the current node properties in the start/end element callbacks. I know that the fourth argument of htmlSAXParseDoc can be used to pass any user defined data to the callbacks, but I don't have a pointer to xmlParserCtxt.

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• What is the best credit card processing service?

  - by JerSchneid

  We're looking to add credit card payments to our system (and it needs to be fairly custom, handling variable "per use" charges each month). We would like the integration to be simple and secure (i.e. no storing of credit card data on our system). What, in your opinion, is the best credit card processing provider to offer this kind of security and flexibility. List only one provider per answer to let the voting system do it's thing.

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• When is 'drawRect' called?

  - by Egil

  I have some custom drawing code in drawRect which also performs some calculation of sizes. When is the earliest I can be sure that this code has been loaded, e.g. if I want to modify it's containers size accordingly?

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• C# - Image as a clickable button

  - by fonix232

  I want to make some custom controls, with images as buttons. I don't want images ON buttons - I want to totally replace the button with an image read from a file. Is it possible?

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• Recommendations for a programmable drivers license scanner?

  - by Slapout

  Our motor pool wants to scan drivers’ licenses and have the data imported into our custom system. We're looking for something that will allow us to programmatically get the data from the scanner (including the picture) and let us insert it into our application. I was wondering if anyone has had experience with this type of system and could recommend one or tell us which ones to avoid. Our application is written in PowerBuilder and uses a DB2 database.

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• How make data entry using autogenerated texboxes in ASP.NET MVC?

  - by elbaid

  I'm asking a simple question on how to do data entry when using a custom number of textboxes. Usualy, in books, or tutorials, we consider a fixed number of entries for the controller. But what if the number of entries varies? For a concrete example, imagine some number of products which we need to enter quantity. How to manage this if one time we have 3 products and the other time we have 10 products? Thank you.

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• Target Framework does not change in Visual Studio 2010

  - by Adam Driscoll

  When I change the target framework of any project in Visual Studio 2010 it does not actually change the System assembly references. For example if I target v2.0 and check the properties of System and System.Data I can see that they are still both v4.0. If i change the target to v3.5, System stays at v4.0 but System.Core changes to v3.5. Because of this I am truly not targeting anything except v4.0.

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• SEO for Computer Software Engineering Topics

  - by Michael Aaron Safyan

  I'm currently trying to SEO my development and coding search custom search engine as well my website that has a variety of coding and development resources. I would like to increase the number of links to my website, but I don't want to simply generate spam. What are some places that I should submit my website, where the content would be considered relevant rather than just spam? Thanks.

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• accessing Ruby variable(from model or controller) in SASS

  - by corroded

  Is there a way to access ruby variables in sass or do i have to make a custom function for it? What im trying to do is to generate a stylesheet for each user so in the controller, i do something like: def show respond_to do |format| format.css{render :partial => "styles"} end end then in the view name _styles.haml i do this: :sass #header :background url(user.banner.url) is this possible at all?

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• How to use an external file for database configuration in EJB environment

  - by bosnic

  I need to have a file for database configuration outside of EAR file of my EJB application. Even if I define a datasource and call it via JNDI, I still have some properties that I want to change, like hibernate.dialect or hibernate.show_sql, for example. I tried using: <property name="hibernate.ejb.cfgfile" value="some-file.xml" /> and it works fine when some-file.xml is in jar file, but how to call it from another location. I tried file:/// but didn´t work. thanks

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• Tootip steals mouse click

  - by deerchao

  I'm writing a custom TreeView from ScrollableControl. I decided to show tooltips when mouse is hover nodes with text too long to display. I find out when tooltips are shown, user would not be able to click the node to select it, because (I think) he's clicking the tooltip window, not my control. Is there any easy solutions? As I can see System.Windows.Forms.TreeView don't have this problem. Thanks!

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• WCF - StructureMap - Caching objects for the duration of the request only

  - by Maxim

  So I already have a working implementation of StructureMap with the WCF service (including custom instance provider, behaviors, etc.) When I try to have an object that is instantiated only once per user request, I use the InstanceScope.HttpContext and it throws because the context is null. Do anyone have a proper way of doing that?

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• Save previous context

  - by Ann

  I use CALayers and I`ve override this delegate -(void)drawLayer:(CALayer*)layer inContext:(CGContextRef)context { //draw some rectangle depends on some custom parameters } Then I want to add to this layer another rectangle. And when I call [layer setNeedsDisplay] I expect to see 2 different rectangles in layer but I see only last added rectangle. So please advice me how can I do what I want. Thank you in advance.

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