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• erroneous Visual C float / double conversion?

  - by RED SOFT ADAIR

  In Visual C++ i wrote the following sample in a C++ program: float f1 = 42.48f; double d1 = 42.48; double d2 = f1; I compiled the program with Visual Studio 2005. In the debugger i see the following values: f1 42.480000 float d1 42.479999999999997 double d2 42.479999542236328 double d1 by my knowledege is OK, but d2 is wrong. The problem occurs as well with /fp=precise as with /fp=strict as with /fp=fast. Whats the problem here? Any hint how to avoid this Problem? This leads to serious numerical problems.

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• How does git-diff generate hunk descriptions?

  - by RobM

  (git version 1.6.5.7) When I run git diff the output has a nice scope hint after the line numbers for my Python scripts, e.g.: diff --git a/file.py b/file.py index 024f5bb..c3b5c56 100644 --- a/file.py +++ b/file.py @@ -14,6 +14,8 @@ TITF: Test Infrastructure Tags Format ... @@ -1507,13 +1533,16 @@ class Tags( object ): ... Note that the line numbers are followed by TITF: Test Infrastructure Tags Format and class Tags( object ):. The first patch applies to module scope and the description TITF: Test Infrastructure Tags Format is the module's description. The second patch applies to a method of the Tags class. How does git generate these descriptions? How can I tweak them to show the method name that the patch applies to?

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• How to configure XMPP to allow all logged in user to see each other and chat with each other?

  - by Nachiket

  Hello guys, I am new to XMPP. I am using Openfire server, and created a console client using Smack library. My usecase: All users anonymous, logged in (In future, website visitors) will be able to see other anonymous, logged-in users. And they can initiate a private chat (one-to-one) with any of them. So, I am able to logged in as Anonymous user, but I am not able to see other Anon / Logged in users (using Roster), because they are not in anon user's roster. So, What should be configuration OR custom=component/code to to achieve this usecase? Do I need to create server component? Any hint? OR It can be done using proper configuration? Cheers

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• How many parameters in C# method are acceptable?

  - by Valentin Heinitz

  I am new to C# and have to maintain a C# Application. Now I'v found a method vaving 32 Parameters (not auto-generated code). From C/C++ I remember the rule of thumb "4 Parameters". It may be an old-fashioned rule rooting back to old 0x86 compilers, where 4 Parameters could be accomodated in registers (fast) or on stack otherwise. I am not concerning about performance, but I do have a feeling, that 32 parameters per functions are not easy to maintain even in C#. Or am I completly not up to date? What is the rule of thumb for C#? Thank you for any hint!

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• Spring security oauth2 provider to secure non-spring api

  - by user1241320

  I'm trying to set up an oauth 2.0 provider that should "secure" our restful api using spring-security-oauth. Being a 'spring fan' i thought it could be the quicker solution. main point is this restful thingie is not a spring based webapp. boss says the oauth provider should be a separate application, but i'm starting to doubt that. (got this impression by reading spring-security-oauth) i'm also new here so haven't really got my hands into this other (jersey-powered) restul api (core of our business). any help/hint will be much appreciated.

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• Generating Source Info For Flex BitmapData.

  - by Joshua

  Instead of populating the BitmapData class from an IMAGE. I would like to (within Actionscript) GENERATE some new BitmapData by capturing the Bitmap representing say, a TextArea component on the stage. In other words, sort of take a "screen capture" or "screenshot" of one of the components, and convert that into an image. Am I silly to even wonder if such a thing is feasible? Can an Air/Flex app "look at itself" in this way? Can it turn a datagrid or a canvas or a textinput into the corresponding image AS IF via screen capture? Even a hint in the right direction would be appreciated, Thanks In Advance.

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• Vim Editor is very smart?

  - by Narek

  I am programming in C++ or Java. So I want to use Vim editor, because it is very flexible. I have heard that I can configure the Vim editor to be able to go from object to the definition from function to the definition from class name to the definition Do we have any professional Vim-er that could tell me how exactly to configure Vim for that? Thanks in advance. P.S. In case readers will consider this question is not connected with programming, I would say that this is improving speed of programming. So it is a help to the programmer. So please don't close this question. EDIT: Also I would like to know how vim works with code completion and can vim hint the list of methods that are available for the certain object? If yes, then I would like to know how to configure these options too?

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• Convert my aspx page to png image

  - by Izabela

  I am generating an aspx page which then I need to convert to png and store it somewhere. A similiar situation with mine was asked before here but got still no response. I tried also the code that the Swapnil Fegade has asked but the code is looping continually making request to loading page and no conversion is actually being done. I found some solutions on the web also but they require WebBrowser control which i understood can be used in windows form but i am building a web project. Can you give me any hint or suggest any article that shows a full example doing this task. Thank you guys in advance.

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• how to store dynamically generated pages in html?

  - by Dharmik Bhandari

  I'm working on ASP.net MVC3 Web application that is facing scalability issue. For improving performance I want to store dynamically generated pages in html and serve them from generated html directly rather then querying database for each page request. I'm sure this will dramatically increase performance. Can any one share any hint / example / tutorial on how to do it? And what are challenges? I would also like to know how others are handling performance issue for large e-commerce sites with at-least thousand categories and 200k products with at least 200-500 concurrent visitors? What are the best approaches? Thanks in advance.

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• looking for a set union find algorithm

  - by Mig

  I have thousands of lines of 1 to 100 numbers, every line define a group of numbers and a relationship among them. I need to get the sets of related numbers. Little Example: If I have this 7 lines of data T1 T2 T3 T4 T5 T6 T1 T5 T4 T3 T4 I need a not so slow algorith to know that the sets here are: T1 T2 T6 (because T1 is related with T2 in the first line and T1 related with T6 in the line 5) T3 T4 T5 (because T5 is with T4 in line 6 and T3 is with T4 in line 7) but when you have very big sets is painfully slow to do a search of a T(x) in every big set, and do unions of sets... etc. Do you have a hint to do this in a not so brute force manner? I'm trying to do this in python. Thanks

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• How to display recently installed programs and when they were installed?

  - by salvationishere

  I have a Windows XP and I just installed about 12 new programs. Big mistake! Before I installed these programs, my internet connection was running great. But now after installing and restarting my laptop, the internet is crawling. How can I see what was changed? Hint: prior to installing these 12 programs, I installed IE version 8. So probably if I removed that it would fix it, but the problem is I need IE in order for my SQL/C# web application to work properly.

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• WPF Show wait cursor before application fully loads

  - by e28Makaveli

  I want to show the wait cursor before my WPF application, composed using CAL, fully loads. In the constructor of the main window, I have the following code: public MainWindow([Dependency] IUnityContainer container) { InitializeComponent(); Cursor = System.Windows.Input.Cursors.Wait; Mouse.OverrideCursor = System.Windows.Input.Cursors.Wait; ForceCursor = true; //this.Cursor = System.Windows.Input.Cursors.AppStarting; // event subscriptions PresenterBase.EventAggregate.GetEvent<ModulesLoadedEvent>().Subscribe(OnModulesLoaded); } After all modules have been loaded, the following handler is invoked: private void OnModulesLoaded(EventArgs e) { allModulesLoaded = true; Mouse.OverrideCursor = null; Cursor = System.Windows.Input.Cursors.Arrow; } Problem is, I do not see this wait cursor. What I am missing here? FWIW, I got a hint from this post http://stackoverflow.com/questions/2078766/showing-the-wait-cursor TIA.

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• Using type hints in Clojure for Java return values

  - by mikera

  I'm working on some Java / Clojure interoperability and came across a reflection warning for the following code: (defn load-image [resource-name] (javax.imageio.ImageIO/read (.getResource (class javax.imageio.ImageIO) resource-name))) => Reflection warning, clojure/repl.clj:37 - reference to field read can't be resolved. I'm surprised at this because getResource always returns a URL and I would therefore expect the compiler to use the appropriate static method in javax.imageio.ImageIO/read. The code works fine BTW so it is clearly finding the right method at run time. So two questions: Why is this returning a reflection warning? What type hint do I need to fix this?

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• I can't change HTTP request header Content-Type value using jQuery

  - by Matt

  Hi I tried to override HTTP request header content by using jQuery's AJAX function. It looks like this $.ajax({ type : "POST", url : url, data : data, contentType: "application/x-www-form-urlencoded;charset=big5", beforeSend: function(xhr) { xhr.setRequestHeader("Accept-Charset","big5"); xhr.setRequestHeader("Content-Type","application/x-www-form-urlencoded;charset=big5"); }, success: function(rs) { target.html(rs); } }); Content-Type header is default to "application/x-www-form-urlencoded; charset=UTF-8", but it obviously I can't override its value no matter I use 'contentType' or 'beforeSend' approaches. Could anyone adivse me a hint that how do I or can I change the HTTP request's content-type value? thanks a lot. btw, is there any good documentation that I can study JavaScript's XMLHttpRequest's encoding handling?

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• CoreDumpDirectory isn't working on ubuntu; getting segmentation fault with php

  - by siran

  I'm trying to solve a segmentation fault. This message appears in my apache-error.log: [notice] child pid 3979 exit signal Segmentation fault (11) I've tried disabling some apache and php modules but I'm still getting the same error. I've also tried putting this in apache2.conf: CoreDumpDirectory /tmp/apache2-gdb-dump and then chmod 777, chown www-data... so that the server can write. I can see no core-dump files to give me a hint on the error. Does anybody have an idea why CoreDumpDirectory isn't working on Ubuntu?

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• Why am I getting this warning about my app delegate and CLLocationManageDelegate?

  - by Dan Ray

  Observe this perfectly simple UIViewController subclass method: -(IBAction)launchSearch { OffersSearchController *search = [[OffersSearchController alloc] initWithNibName:@"OffersSearchView" bundle:nil]; EverWondrAppDelegate *del = [UIApplication sharedApplication].delegate; [del.navigationController pushViewController:search animated:YES]; [search release]; } On the line where I get *del, I am getting a compiler warning that reads, Type 'id <UIApplicationDelegate>' does not conform to the 'CLLocationManagerDelegate' protocol. In fact, my app delegate DOES conform to that protocol, AND what I'm doing here has nothing at all to do with that. So what's up with that message? Secondary question: sometimes I can get to my navigationController via self.navigationController, and sometimes I can't, and have to go to my app delegate's property to get it like I'm doing here. Any hint about why that is would be very useful.

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• how to set imageview in webview

  - by mohsinpathan

  I am creating runtime images. i want to set that image in to web view. Please give me a hint or document.My source code is given below CGRect pdfSize = GetPdfSize(UIGraphicsGetCurrentContext(), initialPage, [filePath UTF8String],myTable,mainString); //UIImageView *imgV=[[UIImageView alloc]initWithFrame:CGRectMake(0, 0, 598,768)]; UIImageView *imgV=[[UIImageView alloc]initWithFrame:CGRectMake(0, 0, pdfSize.size.width,pdfSize.size.height)]; UIGraphicsBeginImageContext(CGSizeMake(pdfSize.size.width,pdfSize.size.height)); MyDisplayPDFPage(UIGraphicsGetCurrentContext(), initialPage, [filePath UTF8String],myTable,mainString); imgV.image=UIGraphicsGetImageFromCurrentImageContext(); imgV.image=[imgV.image rotate:UIImageOrientationDownMirrored];

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• make: invoke command for multiple targets of multiple files?

  - by marvin2k

  Hi, I looking to optimize an existing Makefile. It's used to create multiple plots (using Octave) for every logfile in a given directory using an scriptfile for every plot which takes a logfilename as an argument. In the Moment, I use one single rule for every kind of plot available, with a handwritten call to Octave, giving the specific scriptfile/logfile as an argument. It would be nice, if every plot has "his" octave-script as a dependency (plus the logfile, of course), so only one plot is regenerated if his script is changed. Since I don't want to type that much, I wonder how I can simplifiy this by using only one general rule to build "a" plot? To make it clearer: Logfile: "$(LOGNAME).log" Scriptfile: "plot$(PLOTNAME).m" creates "$(LOGNAME)_$(PLOTNAME).png" The first thing I had in mind: %1_%2.png: %1.log $(OCTAVE) --eval "plot$<2('$<1')" But this seems not to be allowed. Could someone give me a hint?

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• DataMapper: using auto_migrate! with many-to-many dependencies?

  - by pschuegr

  Hi, I'm trying to migrate my app from MySql to Postgresql, using Rails3-pre and the latest DataMapper. I have several models which are related through many-to-many relationships using :through = Resource, which means that DataMapper creates a join table with foreign keys for both models. I can't auto_migrate! these changes, because I keep getting this: ERROR: cannot drop table users because other objects depend on it DETAIL: constraint artist_users_owner_fk on table artist_users depends on table users constraint site_users_owner_fk on table site_users depends on table users HINT: Use DROP ... CASCADE to drop the dependent objects too. I have tried everything I can think of, and thought I had things working when I added :constraint = :skip to the field definition, but I keep getting that error back when I try and run auto_migrate. I thought that :skip meant that it would ignore the dependents, but maybe that only applies for deleting rows and not dropping tables? I should mention that I can run auto_migrate after i nuke the db once, but after that, errors. Any suggestions or advice much appreciated.

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• what is value of x for load and store

  - by Kevinniceguy

  This is some challenge On a single processor system, in which load and store are assumed to be atomic, what are all the possible values for x after both threads have completed in the following execution, assuming that x is initialised to O? Hint: you need to consider how this code might be compiled into machine language. for (int i = 0; i < 5; i++) : x = x + 1; for (int j = 0; j < 5; j++) : x = x + 1;

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• How to use application config file in C#?

  - by badpanda

  I am trying to use a config file in my C# console application. I created the file within the project by going New -- Application Configuration File, and naming it myProjectName.config. My config file looks like this: <?xml version="1.0" encoding="utf-8" ?> <configuration> <appSettings> <add key="SSDirectory" value="D:\Documents and Settings\****\MyDocuments\****" /> </appSettings> </configuration> The code to access it looks like this: private FileValidateUtil() { sSDirFilePath = ConfigurationSettings.AppSettings["SSDirectory"]; if (sSDirFilePath == null) Console.WriteLine("config file not reading in."); } Can anyone lend a hint as to why this is not working? (I am getting the error message.) Thanks!! badPanda

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• Can Crystal Reports Scale to Fit Page

  - by Jacob Reyes

  Hello , Can a crystal report be scaled to fit page? I'm hoping to achieve something similar to Microsoft Excel's Scale To Fit feature wherein a large spreadsheet can be scaled to fit a 8.5"x 11" page. (On MS Excel 2007 goto Page Layout Scale To Fit). Im searching of a way to make a large report fit into a smaller page during print. for example a report designed in Legal(8.5"x 14") page must be able to shrink when print previewed for Letter(8.5"x 11") page. In my crystal report, it should be scaled to fit the page by default. I was thinking maybe theres a Crystal Report Setting or C# code technique that I missed out. Any hint or link to the right direction is appreciated. Thanks!

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• Postgres : Post statement (or insert) asynchronous, non-blocking processing.

  - by Hassan Syed

  I'm wondering if it is possible, that after a collection of rows is inserted, to initiate an operation that is executed asynchronously, is non-blocking, and doesn't need to inform the originator of the request - of the result. I am working with large amounts of events and I can guarantee that the post-insert logic will not fail -- I just want to have a single insert thread in my event-sources, and I want this thread to keep flying without blocking, and without being responsible for any post-delivery book-keeping. I can tell you that I would potentially have a 100 of these jobs executing concurrently and each job might operate on 5 tables with anywhere between 200-1000 inserts on each of these tables. A hint in the right direction should be enough.

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• ASP.NET client side validation with dataannotations - javascript minimumlength zero

  - by Kordonme

  Hi! I'm doing client side validation on a project I'm working on. Everything works, except for the minimumlength property of the StringLength attribute (it works when submitting and a serverside validation is done): [StringLength(50, MinimumLength = 6)] The javascript generated by Html.EnableClientValication(); is the following: // snip {"FieldName":"User.Password","ReplaceValidationMessageContents":true,"ValidationMessageId":"User_Password_validationMessage","ValidationRules":[{"ErrorMessage":"The field Password must be a string with a minimum length of 6 and a maximum length of 50.","ValidationParameters":{"minimumLength":0,"maximumLength":50},"ValidationType":"stringLength"}]}],"FormId":"form0","ReplaceValidationSummary":false}) The important thing is here: {"minimumLength":0,"maximumLength":50} It produces javascript with the wrong minimumproperty. You guys have a hint? Is this a possible bug?

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• Rails: Converting from MySQL to PostGres breaks Geokit Distance Calculations???

  - by Kevin

  I recently switched my database from MySQL to PostGres. I also use GeoKit. When I started my app up with the new database already seeded, I get the following error: PGError: ERROR: function radians(character varying) does not exist LINE 1: ...COS(0.661045389762993)*COS(-2.12957994527573)*COS(RADIANS(ti... ^ HINT: No function matches the given name and argument types. You might need to add explicit type casts. Anyone know why this is breaking now? I know GeoKit still works because it's still performing the geocoding in the model per ticket when the database is seeded, it just won't do the distance calculations correctly.

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