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• Branch prediction , correlation bit

  - by Maciej Adrzej

  Problem ; Consider following simplified code fragment; if (d==0) d=1; if (d==1) ... Construct the action table for the 1-bit predictor with 1-bit correlation assuming predictor initialized to NOT TAKEN and the correlation bit is initialized to TAKEN. The value of d alternates 1,2,1,2 Note count the instances of misprediction. I tried to solve question my answer is ; |d=?|B1 |B1 |New B1 |B2 |B2 | New B2 | | |Prediction|Action|Prediction|Prediction|Action|Prediction| |1 | NT/NT | T | T/NT | NT/NT | NT | NT/NT | |2 | T/NT | T | T/NT | NT/NT | T | NT/T | |1 | T/NT | T | T/NT | NT/T | NT | NT/NT | |2 | T/NT | T | T/NT | NT/NT | T | NT/T | I doubt whether it is true or not ? Any idea ?

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• Generic Data Structure Description Language

  - by Jon Purdy

  I am wondering whether there exists any declarative language for arbitrarily describing the format and semantics of a data structure, that can be compiled to a specific implementation of that structure in any of a set of target languages. That is, something like a generic data definition language but geared toward describing arbitrary data structures such as vectors, lists, trees, etc., and the semantics of operations on those structures. I ask because I had an idea for a feasible implementation of this concept, and I'm just wondering whether it's worth it, and, consequently, whether it's been done before. Another, slightly more abstract question: is there any real difference between the normative specification of a data structure (what it does) and its implementation (how it does it)?

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• Convert 2 bytes to a number

  - by Vaccano

  I have a control that has a byte array in it. Every now and then there are two bytes that tell me some info about number of future items in the array. So as an example I could have: ... ... Item [4] = 7 Item [5] = 0 ... ... The value of this is clearly 7. But what about this? ... ... Item [4] = 0 Item [5] = 7 ... ... Any idea on what that equates to (as an normal int)? I went to binary and thought it may be 11100000000 which equals 1792. But I don't know if that is how it really works (ie does it use the whole 8 items for the byte). Is there any way to know this with out testing? Note: I am using C# 3.0 and visual studio 2008

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• WPF Error when implementing Login.xaml

  - by LnDCobra

  I am getting the following exception: "Nullable object must have a value" Everything was working when I was using StartupURI="MainWindow.xaml" but I wanted to implement a login screen so I changed this to Startup="Application_Startup" and then created the following method in App.xaml.cs: private void Application_Startup(object sender, StartupEventArgs e) { UpdateAccounts(); bool result = true; ///* LoginWindow login = new LoginWindow(); result = login.ShowDialog().Value; /* */ if (!result) { return; } MainWindow window = new MainWindow(); bool main = window.ShowDialog().Value; } Does anyone have any idea what is going on? Or any suggestions on what is the best practice for implementing login interface.

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• Mapping <C-Tab> in my vimrc fails in Ubuntu

  - by nfm

  I want to map ctrl-tab to :tabn, and ctrl-shift-tab to :tabp. I had it working for gVim in Windows XP, but moved it to my .vimrc in Ubuntu 9.10 and it doesn't work (vim 7.2). Here's the relevant section of my .vimrc: nmap <C-Tab> :tabn<CR> nmap <C-S-Tab> :tabp<CR> nmap <C-t> :tabnew<CR> <C-t> works fine, so mapping the ctrl key doesn't seem to be a problem. I really have no idea where to start! What could be going wrong here, considering it worked fine under Windows?

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• UIAlertView Dismiss Not Really Dismissed

  - by Jim Bonner

  Below is the code I'm using to do a retry on an FBConnect session. When the [self loginToFaceBook] fires FBConnect adds a subview to 'window' which is still the UIAlert view, so when the UIAlert really dismisses it takes the FBConnect view with it. Any idea as to the best way to wait for the UIAlert view to be gone. -(void)alertView:(UIAlertView *)alertView didDismissWithButtonIndex:(NSInteger)buttonIndex { if([self respondsToSelector:@selector(alertContinue)]) { [self alertContinue]; } } -(void)alertContinue { SocialLiteAppDelegate *appDelegate = (SocialLiteAppDelegate *)[[UIApplication sharedApplication] delegate]; [appDelegate.fbSession logout]; [self loginToFaceBook]; }

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• Custom Forum ~ Suggestions for topics pages (eg. active topics page, unanswered topics page) +1 othe

  - by Joe

  Lets say I was to develop a small forum script, what types of topics pages would you find most helpful? I'd like to get an idea of what should be added. Viewing popular phpBB forums, they offer "Unanswered Posts", "Active Topics" and "Unread Topics". Obviously I'm already including a page to view your own topics and posts. My other question was, is it a big deal that I'm not tracking whether or not you've read a topic? I already provide the page showing all topics you've participated in... just not ones that you've "viewed". Would this be something forum users would only end up complaining about? I don't like the options available to track topics that are read/not read, that's the only reason I am not considering adding this feature at this stage. Many thanks everyone for any help.

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• silverlight 3.0 communication with winforms

  - by abusemind

  I would like to create a winform on the client side for interaction with Silverlight 3.0. The basic idea is using the winform browser. I definitely need both the directions of communication. Would it be impossible by using JavaScript as a midware for the interaction or some better ways? Or is there any new features of Silverlight 3.0 supported for this kind of winform application communication? The original one is one the client's browser to run but now I would like to migrate it to the winform application. For the sake of time-saving, please don't mention about the WPF because of the gap between WPF and the Silverlight.

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• What is the scope of xsl apply-imports?

  - by calavera.info

  My original idea about apply-imports was that if there are two templates which matches the same node, then using apply-imports in a template with higher priority runs the template with the lower priority. But I recently find out that it's important how are imports organized. Two cases interests me particularly. Will apply imports work on a template which is imported in imported file (nested import)? How about a "sibling import" (master file imports two files with templates matching the same nodes) It seems to me that this is not clearly described in specification. Could someone provide authoritative guidelines? EDIT: I can try those cases on my own, but there is always a danger that it will be implementation specific behavior.

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• adding an existing implementation file to an xcode project won't work

  - by karsten

  As I write most of my code using MacVIM, I need to add the new files to the XCode project in order to compile them into the executable. Today however I encoutered an implementation file (.m) wich XCode won't allow to be added. It appears light gray the appropriate finder window as if it were already included in the project, but when I try to build, I get a linker error, stating that the symbol defined this implementation file could not be found. The corresponding header file could be added without problems. Any idea what could have caused this problem? Btw. I deleted a former version of the same file from the "Classes" tree before, as well as many others wich were successfully re-added. Thanks in advance.

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• Eclipse + PDT hides files extensions

  - by pzearfoss

  Eclipse is now hiding file extensions in PDT, in the PHP Explorer. They show up on tabs when the file is opened. This applies to files of all types. While annoying, it didn't become problematic until I started including the .htaccess files in the list. They now show up with no filename at all. I've scoured the prefs and the web looking for a resolution. Anyone had this happen or have an idea of how to fix it? Running Eclipse 3.5.2 PDT 2.1 on MacOS 10.5

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• Adsense in a ajax based application?

  - by prashant_sp

  How do I add adsense or other ads in a asp.net ajax/ajax based application ? (ex. ra-ajax samples page) or GWT Is creating an iframe a viable solution? As stated below, placing adsense script is easy. But the google bot wont be able to scan my ajax based page, as all of the content is javascript. There wont be contextual ads. So wont be able to monetize. It would be great for static ads. Any idea/inputs?

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• Rails and Searchlogic: finding products that matching all given product categories by using searchlo

  - by Roland

  I have a model Publication and a model Category in my Rails app. Both are connected with a has_and_belongs_to_many association. Now I would like to search publications that match one or more categories. If more than one category is given they have all assigned to the publication. I want to specify the categories in a multiple select_box. Publication.released.categories_id_is([1,2]) is not working because the categories are connected with OR. With Publication.categories_id_is_all([1,2]) the categories are connected with AND, but no result is given back. Any idea's on that? Am I mising the right point in the docs. Thanks for your very welcome help!

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• Tracking fitness in a genetic algorithm

  - by Chuck Vose

  I'm still hacking on my old ruby for the undead post (I know, I know, stop trying to bring the post back from the dead Chuck). But the code has gotten a little out of hand and now I'm working on a genetic algorithm to create the ultimate battle of living and dead with the fitness being how long the battle lasts. So, I've got the basics of it down; how to adjust attributes of the game and how to acquire the fitness of a solution, what I can't figure out is how to store the fitness so that I know when I've tried a combination before. I've not been able to find much genetic code to look at let alone code that I can read well enough to tell what's going on. Does anyone have an idea how this is normally done or just simply an algorithm that could help point me in the right direction?

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• TFS: How to dectet changed files when loading a solution?

  - by marco.ragogna

  I am new to TFS integration with Visual Studio 2010, and I have a problem I would like to solve. Practically, when I open a solution, how can I detect, looking only at the Solution Explorer which file has been changed since my last login? I am able to discover the changed files if I look at the Latest column of Source Control Explorer but it is not so intuitive. I attach you an image for better understanding. I would like to have a different icon, not the lock, for frmAbout.vb (in this case), associated to the item in Solution Explorer. Do you have any idea how can I achieve this behavior? Or some alternatives?

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• iPhone like red badge notification in a WPF project?

  - by Norbert

  I have a C# WPF project which generates daily and weekly reports automatically. I want to inform the user when new reports are available, so I thought of a badge like on the iPhone where the number of new messages appears on a little red circle: I thought of three images: Two images with semi circles on the left and right if the number to display is small. And a third image for the middle for the case that the number is large (123) and wouldn't fit in a circle. I want a glossy effect, so I've thought of pictures. Does anyone have a good idea how to do this without pictures but programmatically?

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• Calling Oracle Function with "complex" return value from C#

  - by devdimi

  I have an Oracle function returning record defined in the package, so one can do: select a,b,c FROM my_function(...); Calling this oracle function from .NET is as simple as executing normal sql query. Unfortunately the function has to do updates now and when it is called like this Oracle complains that updates are not allowed within selects and that makes sense. So now I am left with the choice to change the function call or to split the function. Basically I have to get rid of the select in the function call and need something like this in C#: EXEC :var:= my_func(...); where the type of var is custom tuple defined in the package. I have already tried using ParameterDirection.ReturnValue without success. Does anyone have an idea?

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• Visual Studio ignore try catch - debug only

  - by Praesagus

  I think error handling is a good idea. :) When debugging it can get in the way - especially with nice user friendly messages. In VB6 I could just check a box for the compiler to ignore my error handling. I found the dialog that allows me to do something similar in VS, but it's about 10,000 check boxes instead of one - which is too many to change every time I want a production compilation. Is there a way to set VS up so when I am in debugging mode I get one set of conditions and when I am in production I get another? ...or is there just another method to handling errors and debugging more efficiently? Thanks

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• Ruby DEPRECATION WARNING: You are using the old router DSL which will be removed in Rails 3.1.

  - by user297221

  Hi guys. I am using rails 3 and at the moment i am writing tests for my application. I get this weird deprecation warning: DEPRECATION WARNING: You are using the old router DSL which will be removed in Rails 3.1. Please check how to update your routes file at: http://www.engineyard.com/blog/2010/the-lowdown-on-routes-in-rails-3/. (called from at /Users/jeljer/Dropbox/webCMS/config/environment.rb:6) Of course my routes file is this: WebCMS::Application.routes.draw do #... end but no luck. If I look at the place what it is pointing to in my enviroment.rb: WebCMS::Application.initialize! I did a gem cleanup without any luck. Does anybody have an idea? ps. i am using rvm with ruby 1.9.2

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• YouTube player api - addEventListener() does not work for me?

  - by user246114

  Hi, I'm using the youtube player api. I'm following the doc here: http://code.google.com/apis/youtube/js_api_reference.html having a problem adding an event listener on the player, it seems to just get stuck there. I put an alert statement directly after, which never gets called: ytplayer.addEventListener("onStateChange", "onytplayerStateChange"); alert("I never get called..."); any idea why this would happen? Running it through FF chrome safari, same thing happens on all. Other player features all work fine. I'm using the swfobject version. I'm running this live from a server too. I don't get it. Thanks

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• Needed list of special characters classification with respective characters

  - by pravin

  I am working on one web application , It's related to machine translation support i.e. which takes source text for translation and translated in to user specified language Currently it's in unit testing phase. Here, i want to check that, whether my machine translation feature is fully working for all the special characters. Because of different test cases I stuck at one point where i need all the special characters with classification. I needed all the special characters listing with classification. e.g. 1st : class name : Punctuation Characters : !?,"| etc test cases : segment1? segment2! segment3. 2nd : Class name : HTML entities characters : all the characters which belong under this class test cases : respective test cases 3rd : Class name : Extended ASCII characters :all the characters which belong under this class test cases : respective test cases Please folks provide this, if anyone has any idea or links so that i can make product perfect Thanks a lot

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• How to configure iReports to use grails domain class ?

  - by fabien-barbier

  I'm using JasperGrails plugins (http://www.grails.org/Jasper+Plugin) to generate reports. When I configure iReports dataSource with Database JDBC connection everything works well. But how to configure iReports with grails and Jasper plugin ? I try to configure my dataSource by selecting "JavaBeans set data source", but I have this error message : ClassNotFoundError ! (I try to add my domain in classpath by pointing to my IDEA project folder, but I have always same message). What is the best way to configure iReports with grails/groovy ?

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• Java3D getting time problem

  - by Meko

  HI ..I made little Shooter game that on screen two ships firing each other.I ahve method on paintComponent like drawing or moving object.But in some reason it works different speed on each komputer.I searchand made some modification to my game like drawing and moving objects in thread..Now it works on every ?omputer same speed.Also if I change size.But problem is I used J3DTimer.getValue() .For this library I donwnloaded Java3d. Problem is If on machine there is no this library or installation my game doesnot working .How can I solw this problem? I should say every one to setup Java#d? :)) ALso I used standart System.currentTimeMillis(); but now my game works very slow...Any idea?

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• System.OutOfMemoryException on file download

  - by frosty

  I have an ashx handler with the following code. The idea is to hide the path of the file and prompt a download context.Response.Clear(); context.Response.AddHeader("Content-Disposition", "attachment; filename=" + fileName); context.Response.AddHeader("Content-Length", file.Length.ToString()); context.Response.ContentType = "application/octet-stream"; context.Response.WriteFile(file.FullName); This works fine for some files however on others i get Exception of type 'System.OutOfMemoryException' was thrown.

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• Cross-platform (microcontroller-PC) algorithm development

  - by Kyr

  Hello people! I was asked to develop a algorithm for network application on C. This project will be developed on Linux for PC and then it will be transferred to a more portable platform, something that will include a microcontroller. There are many microcontroller/companies out there that provide very nice and large libraries for TCP/IP. This software will hold statistics on the network performance. The whole idea of a cross platform (uC - PC) seems rubbish to me cause eventually the code should be written in a more platform specific way for the microcontroller, but I am not expert to judge anyway. Is there any clever way of doing this or is there a anyone that did this before? My brainstorming has "Wrapper library" and "Matlab"... Any ideas? Thx!

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