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• Assign multiple test categories using TestCategoryAttribute

  - by Michael Freidgeim

  I am using TestCategoryAttribute to filter which tests to run during builds and wandered, how to -how to assign multiple test categories.According to constructor documentation only single category can be specified.  However TestCategories Property (plural!)can return multiple categories.Grouping Tests into Test Categories: You can add an automated test to one or multiple test categories using a test attribute. Each test can belong to multiple test categories.The recommended approach from MSDN How to: Group and Run Automated Tests Using Test Categories is to specify multiple TestCategory attributes like the following[TestCategory("Nightly"), TestCategory("Weekly"), TestCategory("ShoppingCart"), TestMethod()]public Void DebitTest() { }Article http://toddmeinershagen.blogspot.com.au/2010/09/create-custom-test-category-attributes.htmlshows how enums can be used instead of strings.It also explains, that TestCategories Property can be used in derived custom attributes.v

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• Switching CSS to use asset pipeline in Rails?

  - by John

  I have a lot of legacy CSS files from what was a Rails 2.x app that got upgraded to Rails 3.2.8, and I want to switch over to using the Rails asset pipeline for stylesheets. The issue is, the CSS stuff is messy in terms of huge lines of code, duplicate file names, and unorganized folder structure. After looking through individual pages, and trying to add individual stylesheets and folders into the asset pipeline and spending some cycles debugging, I realized there's probably a better approach. Is there a way to test to make sure the old CSS matches up with the asset pipeline CSS? What are some good tools for testing and debugging CSS?

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• how to set owner and permission to a cryptsetup made device?

  - by Antoine Rodriguez

  I have an encrypted loopback volume. I need to mount and umount manually the volume so I use cryptsetup luksOpen and cryptsetup luksClose . However, When I invoke this command it pops up the /dev/mapper device under all the sessions under gnome/xfce/kde/unity ... And then it let the user to mount (with password), expulse and unmount the volume. It's quite annoying in a multi user server (you are working on your files and the volume is being unmounted). How can I define ownership and permission on the device ? I've tried chown and chmod approach witch gives nothing. Cryptsetup doesn't have any options that let you do that. crypttab auto mount the filesystem on boot witch is unwanted (only manual mount)

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• Data binding directly to a store query (DbSet, DbQuery, DbSqlQuery) is not supported.

  - by Chandradev

  HiI was doing some test with code first approach in EF. Then while populating the Gridview i was getting error like thisData binding directly to a store query (DbSet, DbQuery, DbSqlQuery) is not supported. Instead populate a DbSet with data, for example by calling Load on the DbSet, and then bind to local data. For WPF bind to DbSet.Local. For WinForms bind to DbSet.Local.ToBindingList().For solving this error we have to write the code like this private void FillGrid()        {            using (var Context = new EmpDatabaseContext())            {                var query = Context.Emps.Select(m => m);                //var query = from m in Context.Emps                //            select m;               // Gridview1.DataSource = query;                Gridview1.DataSource = query.ToList();                Gridview1.DataBind();            }        }  We canot bind Iqueryable directly. We have to change into ToList()

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• In case you missed our Febrary Oracle Database Webcasts....

  - by jenny.gelhausen

  Click below to register and listen to the February Database Webcast replays: Maximize Availability with Oracle Database 11g with Oracle Database expert Joe Meeks. Think Your Database Applications are Secure? Think Again. with Oracle Security expert Roxana Bradescu. SANS Oracle Database Security: A Defense in Depth Approach with SANS senior instructor Tanya Baccam. Upgrading to Oracle Database 11g with Roger Snowden from Oracle Support's Center of Expertise. Consolidate for Business Advantage: From Storage to Scorecard with Oracle Business Intelligence and Enterprise Performance Management expert Tobin Gilman. Enjoy! var gaJsHost = (("https:" == document.location.protocol) ? "https://ssl." : "http://www."); document.write(unescape("%3Cscript src='" + gaJsHost + "google-analytics.com/ga.js' type='text/javascript'%3E%3C/script%3E")); try { var pageTracker = _gat._getTracker("UA-13185312-1"); pageTracker._trackPageview(); } catch(err) {}

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• How to ask the boss to pay for training courses

  - by jiceo

  Recently I came upon a well known local consulting company that has some interesting courses I'd like to take. The course is not cheap enough for me to pay out of my own pocket and not feel bad afterwards. The thing is that my startup company uses one set of framework (Python+Django) for most of the stuff I have to deal with, but the course covers Ruby on Rails 3. Since I've not had exposure to Ruby on Rails, and after seeing so many people speak highly of the course, I really thought it would be a good opportunity. I know that I'd have to approach my boss at the angle of 'how this might benefit the company' but other than this, any suggestions?

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• Are there examples of non CRUD approaches?

  - by Pieter B

  I'm a programmer but also have worked as an archivist. As archivist it's a lot about keeping data. I often get into arguments with colleagues when it comes to operations on data. I don't like the U and the D in CRUD too much. Rather then update a record I prefer to add a new one and have a reference to the old record. That way you build a history of changes. I also don't like deleting records but rather mark them as inactive. Is there a term for this? Basically only creating and reading data? Are there examples of this approach?

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• Merck Serono Gains Deep Understanding of Product Portfolio Value-Drivers, Risks, and Sales Expectations Through Forecasting Solution

  - by Melissa Centurio Lopes

  Normal 0 false false false EN-US X-NONE X-NONE MicrosoftInternetExplorer4 /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-qformat:yes; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin-top:0in; mso-para-margin-right:0in; mso-para-margin-bottom:10.0pt; mso-para-margin-left:0in; line-height:115%; mso-pagination:widow-orphan; font-size:11.0pt; font-family:"Calibri","sans-serif"; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin; mso-bidi-font-family:"Times New Roman"; mso-bidi-theme-font:minor-bidi;} Merck Serono S.A. is the biopharmaceutical division of Merck KGaA. It offers leading brands in 150 countries to help patients with cancer, multiple sclerosis, infertility, endocrine and metabolic disorders, as well as cardiovascular diseases. Challenges: Establish a better decision-making framework for its complex, development portfolio of pharmaceutical products, where single-point estimates or expected averages of portfolio values, portfolio risks, and sales forecasts are insufficient and can be misleading Enable the company to be aware at all times of the range of possible outcomes of technical and market risks and uncertainties, such as the technical uncertainty of whether a product will produce the desired clinical outcomes, or the market-related uncertainty of whether a product will be outperformed by its competitors Solutions to Overcome the Challenges: Used Oracle Crystal Ball to devise a Monte-Carlo-based approach to better analyze and define the values and risks of the company’s development portfolio, laying the groundwork for optimized decision-making Enabled a better understanding of the range of potential values and risks to improve portfolio planning Enabled detailed analysis of the likelihood of favorable or unfavorable outcomes, such as the likelihood of whether Merck Serono can meet its sales targets planned for the next ten years with its existing product portfolio Gained the ability to take into account correlative risks, synergies and project interactions, enabling Merck Serono to better forecast what the company may achieve—for example, that there is a 70% probability of a particular sales target being met Established Monte-Carlo-based analysis using Oracle Crystal Ball as a useful element in decision-making at the board level, as the approach provides a better analysis of values and risks associated with the company’s product portfolio “Oracle Crystal Ball enables us to make Monte Carlo simulations of the potential value and sales of our development portfolio. It is a very powerful tool for gaining a thorough understanding and improved awareness of value drivers, uncertainties, and risks, along with associated probabilities.” – Riccardo Lampariello, Associate Director, Merck Serono S.A Why Oracle “We chose Oracle Crystal Ball to enable us to perform Monte Carlo analysis, which gives us a deeper understanding and improved awareness of the value drivers, uncertainties and risks of our portfolio of development projects,” said Kimber Hardy, head of valuation and analysis, Merck Serono S.A. Normal 0 false false false EN-US X-NONE X-NONE MicrosoftInternetExplorer4 /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-qformat:yes; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin-top:0in; mso-para-margin-right:0in; mso-para-margin-bottom:10.0pt; mso-para-margin-left:0in; line-height:115%; mso-pagination:widow-orphan; font-size:11.0pt; font-family:"Calibri","sans-serif"; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin; mso-bidi-font-family:"Times New Roman"; mso-bidi-theme-font:minor-bidi;} Click here to read the full version of the customer success story Normal 0 false false false EN-US X-NONE X-NONE MicrosoftInternetExplorer4 /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-qformat:yes; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin-top:0in; mso-para-margin-right:0in; mso-para-margin-bottom:10.0pt; mso-para-margin-left:0in; line-height:115%; mso-pagination:widow-orphan; font-size:11.0pt; font-family:"Calibri","sans-serif"; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin; mso-bidi-font-family:"Times New Roman"; mso-bidi-theme-font:minor-bidi;}

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• Testing with Profiler Custom Events and Database Snapshots

  We've all had them. One of those stored procedures that is huge and contains complex business logic which may or may not be executed. These procedures make it an absolute nightmare when it comes to debugging problems because they're so complex and have so many logic offshoots that it's very easy to get lost when you're trying to determine the path that the procedure code took when it ran. Fortunately Profiler lets you define custom events that you can raise in your code and capture in a trace so you get a better window into the sub events occurring in your code. I found it very useful to use custom events and a database snapshot to debug some code recently and we'll explore both in this article. I find raising these events and running Profiler to be very useful for testing my stored procedures on my own as well as when my code is going through official testing and user acceptance. It's a simple approach and a great way to catch any performance problems or logic errors.

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• Using AntiXss As The Default Encoder For ASP.NET

  Scott Guthrie recently wrote about the new <%: %> syntax for HTML encoding output in ASP.NET 4. I also covered the topic of HTML encoding code nuggets in the past as well providing some insight into our design choices for the approach we took. A commenter to Scotts blog post asked, Will it be possible to extend this so that is uses libraries like AntiXSS instead? See: http://antixss.codeplex.com/ The answer is yes! ASP.NET 4 includes a new extensibility point which allows you to replace...Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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• Best practice to propagate preferences of application

  - by Shebuka

  What is your approach with propagation to all classes/windows of preferences/settings of your application? Do you share the preference_manager class to all classes/windows who need it or you make variables in each classes/windows and update them manually each time setting are changed? Currently I have a PreferencesInterface class that hold all preferences and is responsible to default all values with a dedicated method called on create and when needed, all values are public, so non getters/setters, also it have virtual SavePreferences/LoadPreferences methods. Then I have PreferencesManager that extends from PreferencesInterface and is responsible for actually implementation of SavePreferences/LoadPreferences. I've made this basically for cross-platform so that every platform can have a different implementation of actual storage (registry, ini, plist, xml, whatever).

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• Cocos2dx- Draw primitives(polygons) on Update

  - by Haider

  In my game I'm trying to draw polygons on on each step i.e. update method. I call draw() method to draw new polygon with dynamic vertices. Following is my code: void HelloWorld::draw(){glLineWidth(1);CCPoint filledVertices[] = {ccp(drawX1,drawY1),ccp(drawX2,drawY2), ccp(drawX3,drawY3), ccp(drawX4,drawY4)};ccDrawSolidPoly( filledVertices, 4, ccc4f(0.5f, 0.5f, 1, 1 ));} I call the draw() method from the update(float dt) method. The engine is behaving inconsistently i.e. sometimes it displays the polygons and on other occasions it does not. Is it the right approach to do such a task? If not what is the best way to display large number of primitives?

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• IValidatableObject vs Single Responsibility

  - by Boris Yankov

  I like the extnesibility point of MVC, allowing view models to implement IValidatableObject, and add custom validation. I try to keep my Controllers lean, having this code be the only validation logic: if (!ModelState.IsValid) return View(loginViewModel); For example a login view model implements IValidatableObject, gets ILoginValidator object via constructor injection: public interface ILoginValidator { bool UserExists(string email); bool IsLoginValid(string userName, string password); } It seems that Ninject, injecting instances in view models isn't really a common practice, may be even an anti-pattern? Is this a good approach? Is there a better one?

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• Coded ui to measure performance

  - by Mike Weber

  I have been tasked with using coded UI to measure performance on a proprietary windows desktop application. The need is to measure how long it takes for the next page/screen to display after a user clicks on a control. For example - a user enters their ID and PW and clicks sign-in. The need is to measure how long it takes for the next screen to display when the user clicks the sign-in button. I understand the need to define what indicates the screen is loaded and ready for use. One approach is to use control.WaitForControlReady and use BeginTimer/EndTimer. Is coded ui a dependable and accurate way of measuring time? Is WaitForControlReady the best method to determine when a control is ready for use?

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• Should each app have its own database, or should small apps be merged into one?

  - by King

  We have a bunch of small to medium sized apps, each of which has its own database (MSSQL Server). There was a suggestion that we consoldate the 'related' databases into a smaller set amount of larger databases. They don't particularly share a lot of data, they would just be under a similar business group. For example, using a 'Finance' DB to hold the tables and procedures for finance apps. Would it be appropriate to use a different schema for each app? E.g. App1.SomeTable App1.SomeOtherTable AppTwo.SomeTable What are the pros and cons of this approach? What should I watch out for? Thanks

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• what is best book to learn optimized programming in java [closed]

  - by Abhishek Simon

  Possible Duplicate: Is there a canonical book for learning Java as an experienced developer? Let me elaborate a little: I used to be a C/C++ programmer where I used data structure concept like trees, queues stack etc and tried to optimize as much as possible, minimum no. of loops, variables and tried to make it efficient. It's been a couple of years that I started writing java codes, but it is simply not that efficient in terms of performance, memory intensive etc. To the point: I want to enter programming challenges using java so I need to improve my approach at things I program. So please suggest me some books that can help me learn to program better and have a chance in solving challenges in programming.

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• Dynamic Tab Implementation in ADF

  - by Vijay Mohan

  Well, this can be a common usecase across apps to open tabs dynamically at runtime based on the request.Well, in order to achieve this you can have a parent container, lets say a panelTab component.Inside panelTab , u can have a showDetailItem inside an af:foreach or an af:iterator binded to a bean static list which will have as many show detail items as you wish to be shown.something like this.private static List = { new showDetailItem("1"),new ShowDetailItem("2") ...};now in the backing bean you can have a method that takes care of rendering and disclosing an specific tab based on the index.public void openMyTab(){List<MyItems> list = refToParentContainer.getChildren();int indexOfTabToBeOpened = //Write a method that will compute the tab index of the next //tab.list.get(index).setRendered(true);list.get(index).setDisclosed(true);similarly you can set other properties too.}Else, instead of having af:foreach/iterator iterating through the SD items , you can go for static SDs in the page with render property set to false and then you can follow the same approach to render/disclose it at runtime.

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• What are some good practices when trying to teach declarative programming to imperative programmers?

  - by ChaosPandion

  I offered to do a little bit training in F# at my company and they seemed to show some interest. They are generally VB6 and C# programmers who don't follow programming with too much passion. That being said I feel like it is easier to write correct code when you think in a functional matter so they should definitely get some benefit out of it. Can anyone offer up some advice on how I should approach this? Ideas Don't focus on the syntax, instead focus on how this language and the idioms it promotes can be used. Try and think of examples that are a pain to write in an imperative fashion but translates to elegant code when written in a declarative fashion.

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• How do I let customers run arbitrary code as securely as possible?

  - by Tyler

  I'd like to offer a service where customers can write arbitrary java code, send it to me, and I'll run it for them on Amazon EC2. My question is: how can I do this without exposing one customer's data to another customer? Right now I'm thinking that each customer can be sandboxed as their own OS-level user with restricted permissions. Is that good enough? I understand that this is a tricky issue, but it seems to be one that many people, such as the designers of multi-user OS's and Amazon themselves are solving, so I am optimistic that there might be a good approach.

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• How to represent a tree structure in NoSQL

  - by Vlad Nicula

  I'm new to NoSQL and have been playing around with a personal project on the MEAN stack (Mongo ExpressJs AngularJs NodeJs). I'm building a document editor of sorts that manages nodes of data. Each document is actually a tree. I have a CRUD api for documents, to create new trees and a CRUD api for nodes in a given document. Right now the documents are represented as a collection that holds everything, including nodes. The children parent relationship is done by ids. So the nodes are an map by id, and each node has references to what nodes are their children. I chose this "flat" approach because it is easier to get a node by id from a document. Being used to having a relation table between nodes and documents, a relation table between nodes and children nodes I find it a bit weird that I have to save the entire "nodes" map each time I update a node. Is there a better way to represent such a data type in NoSQL?

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• What are the downsides to using dependency injection?

  - by kerry

  I recently came across an interesting question on stack overflow with some interesting reponses.  I like this post for three reasons. First, I am a big fan of dependency injection, it forces you to decouple your code, create cohesive interfaces, and should result in testable classes. Second, the author took the approach I usually do when trying to evaluate a technique or technology; suspend personal feelings and try to find some compelling arguments against it. Third, it proved that it is very difficult to come up with a compelling argument against dependency injection. What are the downsides to using dependency injection?

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• How to create contracts in python

  - by recluze

  I am just moving to python from Java and have a question about the way the two do things. My question relates to contracts. An example: an application defines an interface that all plugins must implement and then the main application can call it. In Java: public interface IPlugin { public Image modify(Image img); } public class MainApp { public main_app_logic() { String pluginName = "com.example.myplugin"; IPlugin x = (IPlugin) Class.forName(pluginName); x.modify(someimg); } } The plugin implements the interface and we use reflection in main app to call it. That way, there's a contract between the main app and the plugin that both can refer to. How does one go about doing something similar in Python? And also, which approach is better? p.s. I'm not posting this on SO because I'm much more concerned with the philosophy behind the two approaches.

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• Renderbuffer to GLSL shader?

  - by Dan

  I have a software that performs volume rendering through a raycasting approach. The actual raycasting shader writes the raycasted volume depth into a framebuffer object, through gl_FragDepth, that I bind before calling the shader. The problem I have is that I would like to use this depth in another shader that I call later on. I figured out that the only way to do that is to bind the framebuffer once the raycasting has finished, read the depthmap through something like glReadPixels(0, 0, m_winSize.x , m_winSize.y, GL_DEPTH_COMPONENT, GL_FLOAT, pixels); and write it to a 2D texture as usual glTexImage2D(GL_TEXTURE_2D, 0, GL_DEPTH_COMPONENT24, m_winSize.x, m_winSize.y, 0, GL_DEPTH_COMPONENT, GL_FLOAT, pixels) and then pass this 2D texture that contains a simple depth map to the other shader. However, I am not entirely sure that what I do is the proper way to do this. Is there anyway to pass the framebuffer that I fill up in my raycasting shader to the other shader?

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• What's the better user experience: Waiting once at startup for a long time or waiting frequently for a short time?

  - by Roflcoptr

  I'm currently design an application that involves a lot of calculation. Now I have generally two possibilities which I have both tested: 1) During startup of the application I calculated only the most important values and these values that consume a lot of time. So the user has to wait approximately 15 seconds during startup. But on the other hand a lot of user interactions require recalculation so that the user often has to wait 2-3 seconds after clicking somewhere until the application has calculated and loaded all values 2) I load everything during startup. This takes from 90 to 120 seconds... This is quite a long time, but the big advantage is that all the user interactions are executed immediately. So what would you generally consider the better approach? Loading all time-consuming operations during startup or when needed?

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• Release an upgraded iOS app with a different revenue model

  - by tassock

  I am starting a new iOS project and initially plan release a simple free version to gather feedback. I don't intend to monetize or market this initial version. However, I believe "Version 2" of this app will be good enough to pay for. I would prefer to release Version 2 as an upgrade from Version 1 rather than release it as a separate app. This way I can reserve a name for the app. It will also be easier to keep everything in a single repository. Are there any downsides of this approach? It's my understanding that I can change the price of an app at any point in time, so it shouldn't be an issue transitioning to a paid app, should it?

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