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• I'm a professional Java developer, should I learn .NET?

  - by Alex Spurling

  Java and .NET seem to have a great number of parallels especially in the web application area. Both languages have many of the same technologies especially in terms of open source libraries (JUnit and NUnit, Hibernate and NHibernate) but there are also plenty of differences and different approaches to solving certain software development problems. As a Java developer I get the feeling I'm missing out on learning about web application development from the .NET point of view and I could learn a lot about the general principles by learning two languages rather than getting stuck in the details of Java and not seeing the bigger picture. So the first question is, do you agree? Does learning two separate but similar languages such as Java and .NET make you a better programmer? Secondly, I'm worried that if I choose to take, for example, a MCPD ASP.NET 3.5 certification it won't actually help me get work doing .NET development because it goes against all my existing experience. Is trying to broaden your skills a good career choice or is it a better decision to choose one technology and stick with that?

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• Can a CouchDB document update handler get an update conflict?

  - by jhs

  How likely is a revision conflict when using an update handler? Should I concern myself with conflict-handling code when writing a robust update function? As described in Document Update Handlers, CouchDB 0.10 and later allows on-demand server-side document modification. Update handlers can process non-JSON formats; but the other major features are these: An HTTP front-end to arbitrarily complex document modification code Similar code needn't be written for all possible clients—a DRY architecture Execution is faster and less likely to hit a revision conflict I am unclear about the third point. Executing locally, the update handler will run much faster and with lower latency. But in situations with high contention, that does not guarantee a successful update. Or does the update handler guarantee a successful update?

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• Safari wrapping too early

  - by the Hampster

  I've created a class web page with a page for midterm review. It uses jsMath to turn Tex into nice math. (MathML looks awful) Anyway, I would occasionally like to have several problems per line. Each problem is in its own <span>, so if it needs to wrap, it won't split the problem. It all seems to work, except that Safari for the Mac seems overly anxious to wrap, sometimes wrapping at 30% paragraph width. Even under inspection, it reports a width of 663px, but wrapping occurs at around 150px. There is no padding. Firefox renders just fine. A comparison is here: http://davehampson.net/Images/Safaribug.png Sometimes Safari works just fine. The original web page is here: http://math.davehampson.net/index3.php (study guide 2) I don't know if this is a bug in safari, or if there is some odd/subtle css point I am missing. Any help would be appreciated. --Dave

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• C# How to redirect assembly loading using application config file

  - by Adi barda

  Hi Guys, I have an assembly with few versions registered in the GAC. Now, I want one of my clients which uses this assembly (version 1.3) to point to the newest version (1.4) without opening the source and recompiling the client. I saw an article demonstrating a technique for doing so using the application config file (winform application) here is the config file content : <?xml version="1.0" encoding="utf-8" ?> <configuration xmlns:asm="urn:schemas-microsoft-com:asm.v1"> <runtime> <asm:assemblyBinding> as you can see, there is a binding redirect from version 1.3.0.0 to 1.4.0.0 for assembly named MyFacade. Now, there's only a Minor issue with this approach. It doesn't work :) I'm sure it's something with my code. Any suggestions? Thanks, Adi Barda

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• How to rotate an SSE/AVX vector

  - by user1584773

  I need to perform a rotate operation with as little clock cycle as possible. In the first case let's assume __m128i as source and dest type source: || A0 || A1 || A2 || A3 || dest : || A1 || A2 || A3 || A0 || dest = (__m128i)_mm_shuffle_epi32((__m128i)source, _MM_SHUFFLE(0,3,2,1)); Now I want to do the same whit AVX intrinsics So let's assume this time __m256i as source and dest type source: || A0 || A1 || A2 || A3 || A4 || A5 || A6 || A7 || dest : || A1 || A2 || A3 || A4 || A5 || A6 || A7 || A0 || The Avx intrinsics is missing most of the corresponding SSE integer operations. Maybe there is some way go get the desider output working with the floating point version. I've tryed with: dest = (__m256i)_mm256_shuffle_ps((__m256)source, (__m256)source, _MM_SHUFFLE(0,3,2,1)); but what I get is: || A0 || A2 || A3 || A4 || A5 || A6 || A7 || A1 || Any Idea on how to solve this in an efficient way? (without mixing SSE and AVX operation and without "manually" inverting A0 and A1 Thanks in advance!

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• When is assembler faster than C?

  - by Adam Bellaire

  One of the stated reasons for knowing assembler is that, on occasion, it can be employed to write code that will be more performant than writing that code in a higher-level language, C in particular. However, I've also heard it stated many times that although that's not entirely false, the cases where assembler can actually be used to generate more performant code are both extremely rare and require expert knowledge of and experience with assembler. This question doesn't even get into the fact that assembler instructions will be machine-specific and non-portable, or any of the other aspects of assembler. There are plenty of good reasons for knowing assembler besides this one, of course, but this is meant to be a specific question soliciting examples and data, not an extended discourse on assembler versus higher-level languages. Can anyone provide some specific examples of cases where assembler will be faster than well-written C code using a modern compiler, and can you support that claim with profiling evidence? I am pretty confident these cases exist, but I really want to know exactly how esoteric these cases are, since it seems to be a point of some contention.

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• WMI, WQL, Management Event Objects, MEWatcher Etc, Tutorials (C#)???

  - by IbrarMumtaz

  Anybody got any any tutorials that cover these subjects ... the official MS 70-536 book covers this but I don't want to take any chances as I want additional reading materials problem is, its proving difficult to find anything on it. It's a fairly big subject so am hoping somone on here as here as got some good reading materials on that cover these subjects. At this very moment in time, im reading this; Tutorial01 Its not much, but its a good starting point. I'm not a big fan MSDN and the way its structured and layout, I mainly use it for framework related questions like classes and interfaces and etc. WHen it comes to tutorials, i prefer thrid party websites. Lastly, this extra reading which I am asking for is really revision for the 70-536 exam. TIA. Ibrar

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• What HTML is permitted within Flash text fields.

  - by JasonS

  Hi, Could someone clarify for me what input Flash accepts for its text fields? I am tasked with managing a content management system, this then generates XML which power's flash sites. I have nothing to do with Flash. I work with PHP. Currently we use a rather temperamental Flash Text Editor which is prone to all sorts of troubles. I tried to plug-in tinyMce but it broke the Flash templates. I then recently spoke to someone who said that flash should take any HTML. Now I am confused as this would point to a dodgy template. Can someone clarify. Do Flash text fields handle all HTML or just a limited subset of HTML. If it is the latter, what happens if it comes across a tag it doesn't recognise? Does it display the tag or break? Thanks, Jason

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• Name of the concept of designing an interface to allow expert users to become more efficient?

  - by Grundlefleck

  I'm searching for sources and further information on a particular concept in user experience design. It's not a particularly complicated concept, just that when designing user interfaces, you should both make it intuitive and simple for new users, but also provide way for users to become more efficient as they become more familiar with the application. An example could be including a prominent button for a common action for new users, but also providing a keyboard shortcut / mnemonic for expert users. However, that's just an example, another example could be providing full functionality through a GUI, but allow expert users to script the same actions. The point is it's more difficult to learn, but it makes them more efficient. I'm pretty sure there's a name for that which I can't recall, and I'm having trouble searching for sources and references on it. Name of the concept of designing an interface to allow expert users to become more efficient?

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• using Swing components in javafx if they're not in the NetBeans javafx palette

  - by Jason S

  I'm just getting started with javafx in NetBeans, and I have it doing simple stuff (windows with buttons + the like) but would like to try something slightly more realistic. The "Swing/AWT Components" palette has a whole bunch of stuff that the "JavaFX Script Code Clips" palette does not (it has Button, CheckBox, ComboBox, ComboBoxItem, Label, RadioButton, Slider, TextField, and ToggleButton). How do I add stuff to this palette? I would like to try using some of the components in org-netbeans-swing-outline.jar edit: Aha. I was missing the point somewhat: there are only some javafx-wrapped Swing components available in javafx.ext.Swing.*, so if you want one of the other Swing components you have to wrap them yourself.

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• How to make a secure game in javascript ?

  - by rnaud

  Hello, I'm working on games using javascript some html and css, and I was wondering if there was any way to secure the game so that the user can't just call game.php?result=victory to finish the game and earn some point. As of right now here are the solution I have. For a chance game, start the page with the result already in place, win or loose, then just do some animations to show it, but all the score and win/loose stuff is done server-side. For a battle game, just get the action from the javascript call, and do the damage calculation, reaction of the oponent on the server and just send back the data. but the last solution imply that I will have to send actions each time the user do anything. This might work for a turn by turn battle game, but I think it would be to slow for any other kind of game. So my question is, is there some kind of secure way I can prep my javascript to secure the infomation sent.

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• Purpose of dereferencing a pointer as a parameter in C.

  - by Leif Andersen

  I recently came along this line of code: CustomData_em_free_block(&em->vdata, &eve->data); And I thought, isn't: a->b just syntactic sugar for: (*a).b With that in mind, this line could be re-written as: CustomData_em_free_block(&(*em).vdata, &(*eve).data); If that's the case, what is the point of passing in &(*a), as a parameter, and not just a? It seems like the pointer equivalent of -(-a) is being passed in in, is there any logic for this? Thank you.

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• How to setup RAM disk drive using python or WMI?

  - by Ming Xie

  Hi, The background of my question is associated with Tesseract, the free OCR engine (1985-1995 by HP, now hosting in Google). It specifically requires an input file and an output file; the argument only takes filename (not stream / binary string), so in order to use the wrapper API such as pytesser and / or python-tesser.py, the OCR temp files must be created. I, however, have a lot of images need to OCR; frequent disk write and remove is inevitable (and of course the performance hit). The only choice I could think about is changing the wrapper class and point the temp file to RAM disk, which bring this problem up. If you have better solution, please let me know. Thanks a lot. -M

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• What is better, a STL list or a STL Map for 20 entries, considering order of insertion is as importa

  - by Abhijeet

  I have the following scenario.The implementation is required for a real time application. 1)I need to store at max 20 entries in a container(STL Map, STL List etc). 2)If a new entry comes and 20 entries are already present i have to overwrite the oldest entry with the new entry. Considering point 2, i feel if the container is full (Max 20 entries) 'list' is the best bet as i can always remove the first entry in the list and add the new one at last (push_back). However, search won't be as efficient. For only 20 entries, does it really make a big difference in terms of searching efficiency if i use a list in place of a map? Also considering the cost of insertion in map i feel i should go for a list? Could you please tell what is a better bet for me ?

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• Purpose of lua_lock and lua_unlock?

  - by anon

  What is the point of lua_lock and lua_unlock? The following implies it's important: LUA_API void lua_gettable (lua_State *L, int idx) { StkId t; lua_lock(L); t = index2adr(L, idx); api_checkvalidindex(L, t); luaV_gettable(L, t, L->top - 1, L->top - 1); lua_unlock(L); } LUA_API void lua_getfield (lua_State *L, int idx, const char *k) { StkId t; TValue key; lua_lock(L); t = index2adr(L, idx); api_checkvalidindex(L, t); setsvalue(L, &key, luaS_new(L, k)); luaV_gettable(L, t, &key, L->top); api_incr_top(L); lua_unlock(L); } The following implies it does nothing: #define lua_lock(L) ((void) 0) #define lua_unlock(L) ((void) 0) Please enlighten.

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• Memory issue regarding UIImageView on IPhone 4.0 / IPad

  - by Sagar Mane

  Hello All, My Application is crashing due to low memory [ Received memory warning level 1 + 2] To trace this I have used Instrument and come with following points Test Enviorment : Single view controller added on Window When I don't use UIImageView Real Memory is used 3.66 MB When I uses UIImageView with Image having size 25 KB : Real Memory is used 4.24 MB. almost 560 KB extra when compare to w/o UIImageView and which keep on adding as I am adding more UIImageview on the view. below is sample code for adding UIImageview which I am refering UIImageView* iSplashImage = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"Default-Landscape.png"]]; iSplashImage.frame = CGRectMake(0, 0, 320, 480); [self.window addSubview:iSplashImage]; AND dealloc if(iSplashImage) { [iSplashImage release]; iSplashImage = nil; } Issue is this 560 KB is not getting release and after some time application receives low memory warning. Can anyone point out if I am missing something or doing else. As My application uses lots of Images in One session. Thanks in Advance, Sagar

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• Code Formatter: cleaning up horribly formatted jsp code

  - by ahiru

  So I am working on a jsp/servlet that came to me and I'm looking at the jsp file and it is just a jungle of jstl tags, java code and html thrown together. At first it looked like someone ran the standard eclipse formatter on it and had the page width set to 40 so alot of stuff is broken up, I tried to format it with a larger page width but that seemed to make it worse to the point of not being able to tell what is going on without formatting parts of it first. Anyone have any luck with any jsp/code formatter?

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• Frequent Netbeans freezes

  - by danilo

  I'm using Netbeans 6.8 for PHP projects located on network drives in a Windows network. Frequently, the IDE gets really slow (like a temporary freeze) to a point where it's totally unusable. At first it seems like a total crash, but after some time (might be sevaral minutes) the IDE works again as before. This happens with Netbeans 6.7 as well as 6.8 on my Windows XP 32-bit installation. I'm using Java 1.6.0_13. This is a fresh Netbeans installation, so it can't have to do with too many temp files. I assume it has to do with the frequent code checks that Netbeans does. It's probably not very fast when doing this over the network connection. But it can't be that this feature renders the IDE useless... This thread deals with the same issue http://forums.netbeans.org/viewtopic.php?t=5548. Does anyone know a solution to this problem?

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• ASP.NET Development Server - Empty webResource.axd after conversion from 2.0 to 3.5

  - by David Casey

  I have moved a project from asp.net 2.0 to 3.5. The original project was using the atlas ajax extensions so I have modified the code to use the built in ajax features in 3.5. When running the project within the dev environemnt (VS2008 on Vista Business SP1) and using the asp.net dev server I receive javascript errors such as WebForm_PostBackOptions which point to a missing handler/module. If I deploy the project and run it stand alone within IIS or if I use Fiddler2 while running in VS2008 I do not see the errors and fiddler shows that the axd files are being downloaded correctly. Also deploying to a 2003 server does not show any issues. I could just carry on and forget this as it works when deployed but I would like to understand what is happening. Has anyone got an ideas as to what is going on here and how to get the same results accross all environments?

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• How hard is it to modify the Django Models?

  - by alex

  I am doing geolocation, and Django does not have a PointField. So, I am forced to writing in RAW SQL. GeoDjango, the Django library, does not support the following query for MYSQL databases (can someone verify that for me?) cursor.execute("SELECT id FROM l_tag WHERE\ (GLength(LineStringFromWKB(LineString(asbinary(utm),asbinary(PointFromWKB(point(%s, %s)))))) < %s + accuracy + %s)\ I don't nkow why GeoDjango library cannot do this in MYSQL database. I hate writing RAW SQL for calculating distances between two points. Is there a way I can create my own library for Django that can handle this? If so, how hard is it?

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• How to Use Grizzly Embedded Server for Mule as Well as Jersey

  - by Tim

  I'm currently using JerseyTest w/ Grizzly embedded server to test some code. I do some very simple configuration to point it to the proper resources: Map<String, String> initParams = new HashMap<String, String>(); initParams.put("com.sun.jersey.config.property.packages", "com.sample.service"); ApplicationDescriptor appDescriptor = new ApplicationDescriptor(); appDescriptor.setServletInitParams(initParams); super.setupTestEnvironment(appDescriptor); This works fine and the Jersey components are available and working as expected. I'm now trying to add some Mule functionality to some of these Jersey calls, but Mule is not being properly initialized/configured by Grizzly. Has anyone gotten this kind of setup running? What additional configuration do I need to do with JerseyTest/GrizzlyWebServer to get it to initialize Mule properly?

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• SQL Server: avoiding hard coding of database name in cross-database views

  - by codeulike

  So, lets say you have two SQL Server Databases on the same server that reference each others tables in their Views, Functions and Stored Procedures. You know, things like this: use database_foo create view spaghetti as select f.col1, c.col2 from fusilli f inner join database_bar.dbo.conchigli c on f.id = c.id (I know that cross-database views are not very good practice, but lets just say you're stuck with it) Are there any good techniques to avoid 'hard coding' the database names? (So that should you need to occasionally re-point to a different database - for testing perhaps - you don't need to edit loads of views, fns, sps) I'm interested in SQL 2005 or SQL 2008 solutions. Cheers.

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• Find height of ContextMenuStrip before showing it

  - by Nailuj

  I have a ContextMenuStrip (ctMenuMassEdit) that I want to display when left-clicking a button (btnMassEdit). I want the ContextMenuStrip to be displayed above the button, i.e. position (0,-ContextMenuStrip.Height) relative to the button: private void btnMassEdit_Click(object sender, EventArgs e) { ctMenuMassEdit.Show(btnMassEdit, new Point(0, -ctMenuMassEdit.Height)); } However, the Height property is 0 the first time the button is clicked (I assume the ContextMenuStrip isn't created before it is shown the first time), and the result is that the ContextMenuStrip appears on top of the button. The 2nd time I click the button however, it appears in the correct position, so the basic of my logic is at least correct. I tried adding the following before showing the ContextMenuStrip, but it didn't work as hoped: if (!ctMenuMassEdit.Created) { ctMenuMassEdit.CreateControl(); } So, is there a way I can create the ContextMenuStrip before showing it the first time, so I have the correct Height property? I could of course use the hack of showing it, hiding it and showing it again, but that doesn't seem really neat...

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• Ant target for compile-time code instrumentation with Spring aspects

  - by alecswan

  I have developed a web application using Netbeans 6.7 and Ant. The webapp works, but I would like to refactor the code to use @Configurable Spring annotation for cleaner dependency injection. I was able to get load-time weaving (LTW) of Spring aspects to work intermittently (see http://forum.springsource.org/showthread.php?t=86904). At this point I would like to use compile-time weaving with my tool set. Could anybody provide an Ant target that I can use to weave Spring aspects at compile time? An extra credit will be given to anybody who explains how to configure Netbeans to execute the new Ant target right after code compilation. Thanks.

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• Silverlight Binding to TranslateX

  - by Peanut

  I have a simple winphone7 application, but I think this would apply to any silverlight. Basically I have an ellipse and I would like to move it with the translate X and Y properties. Here is my attempt: <Ellipse Fill="#FFF4F4F5" Margin="0,0,-3,-3" Stroke="Black" RenderTransformOrigin="0.5,0.5" > <Ellipse.RenderTransform> <CompositeTransform TranslateY="{Binding Y}" TranslateX="{Binding X}"/> </Ellipse.RenderTransform> </Ellipse> I am pretty sure the Binding is set correctly; The problem is it gives me this error when I run the application: 2260 An error has occurred. [Line: 4 Position: 33] which is a XAML error. The error goes away when I comment out the composittransform line. Can anyone point me in a right direction? If you need more code let me know, i'll post more up. Thanks

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