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• Easiest way to generate P/Invoke code?

  - by Ope

  I am an experienced .Net programer, but have not compiled a C/C++ program in my life. Now I have this C-dll, headers and documentation (3rd party, not from Win API), from which I need to call about ten methods. I was thinking of using Platform Invoke. I found these three tools that would create the code for me: PInvoker: http://www.pinvoker.com P/Invoke Interop Assistant: http://www.codeplex.com/clrinterop P/Invoke Wizard: http://www.paulyao.com/res/pinvoke/pinvoke.aspx and possibly Swig: http://www.swig.org/ Pinvoker seems to have a bit different approach than the Interop assistant and the Wizard. Swig I just found when checking that this question has not been asked here. What are the pros and cons of these tools? What would be the best = easiest and safest way for me to produce the P/Invoke code given that I don't know much about C/C++?

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• Can I remove items from a ConcurrentDictionary from within an enumeration loop of that dictionary?

  - by the-locster

  So for example: ConcurrentDictionary<string,Payload> itemCache = GetItems(); foreach(KeyValuePair<string,Payload> kvPair in itemCache) { if(TestItemExpiry(kvPair.Value)) { // Remove expired item. Payload removedItem; itemCache.TryRemove(kvPair.Key, out removedItem); } } Obviously with an ordinary Dictionary this will throw an exception because removing items changes the dictionary's internal state during the life of the enumeration. It's my understanding that this is not the case for a ConcurrentDictionary as the provided IEnumerable handles internal state changing. Am I understanding this right? Is there a better pattern to use?

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• How do I link against Intel TBB on Mac OS X with GCC?

  - by SilverSun

  I can't for the life of me figure out how to compile and link against the Intel TBB library on my Mac. I've run the commercial installer and the tbbvars.sh script but I can't figure this out. I have a feeling it is something really obvious and it's just been a bit too long since I've done this kind of thing. tbb_test.cpp #include <tbb/concurrent_queue.h> int main() { tbb::concurrent_queue<int> q; } g++ tbb_test.cpp -I /Library/Frameworks/TBB.framework/Headers -ltbb ...can't find the symbols. Cheers!

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• SVN project folder tree structure vs production folder tree structure

  - by Marco Demaio

  While developing a PHP+JS web application we always try to separate big blocks of code into small modules/components, in order to make these last ones as much reusable as possible in other applications. Let's say we now have: the EcommerceApp (an ecommerce main application) a Server-file-mgr component (a component to view/manage file on server) a Mylib (a library of useful functions) a MailistApp (another main application to handle mail lists) ... EcommerceApp needs both Server-file-mgr component and Mylib to work Server-file-mgr needs Mylib to work MaillistApp needs both Server-file-mgr component and Mylib to work too. My idea is to simply structure the SVN project folder tree putting everything at the same level: trunk/EcommerceApp trunk/Server-file-mgr trunk/Mylib trunk/MaillistApp But in real life to make these apps to work the folder tree structure must be the following: EcommerceApp |_ Mylib |_ Server-file-mgr MaillistApp |_ Mylib |_ Server-file-mgr I mean Mylib and Server-file-mgr needs to be inside the EcommerceApp/MaillistApp folder. How would you then structure the SVN folder, as I did or in a different/better/smarter way???

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• Visual Studio HTML Cursor-within-HTML-Element Syntax-highlighting color

  - by David Murdoch

  I can't, for the life of me, figure out how to change grey highlight color in the screenshot below to something that will make the text a little more legible. Does anyone know what the "Display Item" name is that I need to change? To get to the "theme editor" select Tools = Options = Environment = Fonts and Colors. I can't find what to edit. I've also looked through Tools = Options = Text Editor = HTML = Formatting to no avail. In case you are wondering the theme is a slightly modified Coding Instinct Theme

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• .NET invoking against an arbitrary control.

  - by kerkeslager

  I have a method which takes in a .NET control and calls invoke against it like so: Form.Invoke(Target); However, I've run into an issue numerous times calling this method where due to timing or whatever, the form handle on the form doesn't exist, causing a Invoke or BeginInvoke cannot be called on a control until the window handle has been created error. In frustration, I jokingly changed the code to: MainForm.Invoke(Target); where MainForm is the main window of the application (the form handle for the main form is created at startup and remains active for the entire life cycle of the application). I ran all the tests and manually tested the application and everything seems to work fine despite the fact that this is used everywhere. So my question is, what exactly is the meaning of invoking against a specific control? Is there any downside to just always invoking against a control you know will be active? If not, why does .NET have you invoke against a control in the first place (instead of just creating a static GuiThread.InvokeOnGuiThread(Blah);)?

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• Debugging asp.net with firefox and visual studio.net - very slow compared to IE

  - by john

  Debugging asp.net websites/web projects in visual studio.net 2005 with Firefox is loads slower than using IE. I've read something somewhere that there is a way of fixing this but i can't for the life of me find it again. Does anyone know what i'm on about and can point me in the right direction please? Cheers John edit sorry rob i haven't explained myself very well(again). I prefer Firefox for debugging (firebug etc) hitting F5 when debugging with IE the browser launches really quickly and clicking around my web application is almost instant and when a breakpont is hit i get to my code straight away with no delays. hitting F5 when debugging with FireFox the browser launches really slowly (ok i have plugins that slow FF loading) but clicking around my web application is really really slow and when a breakpoint is hit it takes ages to break into code. i swear i've read something somewhere that there is a setting in Firefox (about:config maybe?) that when changed to some magic setting sorts all this out.

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• Using a PreparedStatement to persist an array of Java Enums to an array of Postgres Enums

  - by McGin

  I have a Java Enum: public enum Equipment { Hood, Blinkers, ToungTie, CheekPieces, Visor, EyeShield, None;} and a corresponding Postgres enum: CREATE TYPE equipment AS ENUM ('Hood', 'Blinkers', 'ToungTie', 'CheekPieces', 'Visor', 'EyeShield', 'None'); Within my database I have a table which has a column containing an array of "equipment" items: CREATE TABLE "Entry" ( id bigint NOT NULL DEFAULT nextval('seq'::regclass), "date" character(10) NOT NULL, equipment equipment[] ); And finally when I am running my application I have an array of the "Equipment" enums which I want to persist to the database using a Prepared Statement, and for the life of me I can't figure out how to do it. StringBuffer sb = new StringBuffer("insert into \"Entry\" "); sb.append("( \"date\", \"equipment \" )"); sb.append(" values ( ?, ? )"); PreparedStatement ps = db.prepareStatement(sb.toString()); ps.setString("2010-10-10"); ps.set???????????

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• jQTouch Spinning Wheel (Cubiq) Implementation Won't Work

  - by Peter

  I am trying to get a nice Spinning Wheel working within my webapp; http://bit.ly/89oWud However, I keep receiving an error within Mobile Safari that the variable 'blabla' cannot be found. I have implemented both of these suggested solutions: 1# Change SpinningWheelCSS 2# Change JQTouch CSS, JS files, and add JQTouch wrapper to body Neither worked for me. I am trying to use the incredible Spinning Wheel by Cubiq.org. I'm likely doing something wrong, but for the life of me I can't figure out what it is. Help is very much appreciated.

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• Sonar default, meet "container state was: CONSTRUCTED"

  - by larry cai

  Environment: hudson/sonar/maven2 in ubuntu locally with default parameters And I got the log from hudson below, I can't figure out where is the problem. [INFO] Sonar host: http://localhost:9000 [INFO] Sonar version: 2.0.1 [INFO] [sonar-core:internal {execution: default-internal}] [INFO] Database dialect class org.sonar.api.database.dialect.Derby [INFO] ------------- Analyzing Game of Life business logic module [INFO] ------------------------------------------------------------------------ [ERROR] BUILD ERROR [INFO] ------------------------------------------------------------------------ [INFO] Can not execute Sonar Embedded error: Can not analyze the project Cannot stop. Current container state was: CONSTRUCTED [INFO] ------------------------------------------------------------------------ [INFO] Trace org.apache.maven.lifecycle.LifecycleExecutionException: Can not execute Sonar And I notice it also has problem when run it command line without hudson mvn sonar:sonar

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• JavaScript setTimeout setInterval within one function

  - by dagoof

  I think I might be overtired but I cannot for the life of me make sense of this, and I think it's due to a lack of knowledge of javascript var itv=function(){ return setInterval(function(){ sys.puts('interval'); }, 1000); } var tout=function(itv){ return setTimeout(function(){ sys.puts('timeout'); clearInterval(itv); }, 5500); } With these two functions I can call a=tout(itv()); and get a looping timer to run for 5.5 seconds and then exit, essentially. By my logic, this should work but it simply is not var dotime=function(){ return setTimeout(function(){ clearInterval(function(){ return setInterval(function(){ sys.puts("interval"); }, 1000); }); }, 5500); } any insight in this matter would be appreciated.

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• Associating Worksheets with their Names using OpenXML SDK 1.0

  - by John Price

  I'm using version 1.0 of Microsoft's OpenXML SDK to do some basic parsing of .xlsx files. I can get and parse the worksheets, and I can get a list of worksheet names, but I cannot for the life of me figure out how to link up what name goes with what worksheet. I understand that an element like <sheet name="My Sheet" sheetId="1" r:id="rId1"/> in the workbook is linked up to a specific worksheet via the relationships defined in xl/_rels.xml, but I can't see where any of the relationship info is exposed in the API. I'm using C#, but any VB.NET examples would be just as helpful. I feel like this should be dead simple, but I can't figure it out. It also looks like it may be more straightforward in v2.0 of the SDK, but upgrading isn't an option at the moment.

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• Qt 4.6 QLineEdit Style. How do I style the gray highlight border so it's rounded?

  - by krunk

  I'm styling a QLineEdit to have rounded borders for use as a search box. The rounding of the borders themselves were easy, but I can't figure out for the life of me how to round the highlighted portion of the widget when it has focus. I've tried QLineEdit::focus, but this only modifies the interior border. The images below show how the illusion of a rounded qlineedit is lost when it gains focus. QListView, QLineEdit { color: rgb(127, 0, 63); selection-color: white; border: 2px groove gray; border-radius: 10px; padding: 2px 4px; } Images with and without focus:

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• Saving Interface Builder Changes when building in Xcode

  - by Tony Eichelberger

  I know many of you have experienced the same the scenario, where you are banging your head against the wall wondering what is wrong with your app only to find that you have forgotten to save your Interface Builder changes. Well, this never happens to me, because for some reason Xcode will prompt me to save any changes in Interface Builder whenever I build. A coworker and I are trying to figure out how to change this on his machine, with no success. I must have done something in the very early stages of my iphone development life to configure this. Does anyone know how to link IB with Xcode so that it will prompt to save changes to IB files during a build?

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• MS SQL Return 1 Row Per Boat

  - by Tyler

  Basically, what I want to do is join 4 tables together and return 1 row for each boat. Table Layouts [Boats] id, date, section, raft [Photos] id, boatid, pthurl, purl [River_Company] id, sort, company, company_short [River_Section] id, section Its very simple as far as structure, however, I've having the time of my life trying to get it to return only 1 row. No boat will ever be on the same day, the only thing that's messing this up is the photo table. If you know a better way for it to return the record table for all the boats boats and only 1 photo from the photo table, please, please post it!!

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• How do you redirect https to http

  - by mauriciopastrana

  that is, the opposite of what (seemingly) everyone teaches. I have a server on https for which I paid an SSL cert for and a mirror for which I haven't and keep around for just for emergencies so it doesn't merit getting a cert for. On my client's desktops I have SOME shortcuts which point to http://production_server and https://productionserver (both work), however; I know that if my prod. server goes down, then DNS forwarding kicks in and those clients which have https on their shortcut will be staring at https://mirrorserver (Which doesnt work) and a big fat IE7 red screen of uneasyness for my company. Unfortunately, I can't just switch this around at the client level. These users are very computer illiterate: and are very likely to freak out from seeing https "insecurity" errors (specially the way FFX3 and IE7 handle it nowadays: FULL STOP, kinda thankfully, but not helping me here LOL). It's very easy to find apache solutions for http-https redirection, but for the life of me I can't do the opposite. Ideas? Cheers, /mp

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• Where can I find the F# runtime for Silverlight 4

  - by Mark Pearl

  I have been playing around with Silverlight & F# and tried to make a Silverlight 4 application in VS2010 Professional. When I try and compile my application I get the following error message... Error 12 F# runtime for Silverlight version v4.0 is not installed. Please go to http://go.microsoft.com/fwlink/?LinkId=177463 to download and install matching.. For the life of me I cannot find the runtime on this page or a place to download it. Does anyone know of the actual URL

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• Boost Thread Specific Storage Question (boost/thread/tss.hpp)

  - by Hassan Syed

  The boost threading library has an abstraction for thread specific (local) storage. I have skimmed over the source code and it seems that the TSS functionality can be used in an application with any existing thread regardless of weather it was created from boost::thread --i.e., this implies that certain callbacks are registered with the kernel to hook in a callback function that may call the destructor of any TSS objects when the thread or process is going out of scope. I have found these callbacks. I need to cache HMAC_CTX's from OpenSSL inside the worker threads of various web-servers (see this, detailed, question for what I am trying to do), and as such I do not controll the life-time of the thread -- the web-server does. Therefore I will use the TSS functionality on threads not created by boost::thread. I just wanted to validate my assumptions before I started implementing the caching logic, are there any flaws in my logic ?

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• nunit2 Nant task always returns exit code 0 (TeamCity 5.0)

  - by Jonathan

  Hello, I just cannot for the life of me get my nant build file to terminate upon a test failure and return (thus preventing the packaging and artifact step from running) This is the unit part of the nant file: <target name="unittest" depends="build"> <nunit2 verbose="true" haltonfailure="false" failonerror="true" failonfailureatend="true"> <formatter type="Xml" /> <test assemblyname="Code\AppMonApiTests\bin\Release\AppMonApiTests.dll" /> </nunit2> </target> And regardless what combination of true/false i set the haltonfailure, failonerror, failonfailureatend properties to, the result is always this: [11:15:09]: Some tests has failed in C:\Build\TeamCity\buildAgent\work\ba5b94566a814a34\Code\AppMonApiTests\bin\Release\AppMonApiTests.dll, tests run terminated. [11:15:09]: NUnit Launcher exited with code: 1 [11:15:09]: Exit code 0 will be returned.1 Please help as i don't want to be publishing binarys where the unit tests have failed!!! TeamCity 5.0 build 10669 AppMonApiTests.dll references nunit.framework.dll v2.5.3.9345 unit isn't installed on the build server or GAC'd Using Nant-0.85 and Nantcontrib-0.85 Thanks, Jonathan

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• How to Use an Environment Variable as an Environment Variable Name

  - by Synetech inc.

  Hi, In my pursuit of a solution to another environment-variable/batch-file related problem, I have once again come across a problem I have visited before (but cannot for the life of me remember how, or even if I solved it). Say you have two BAT files (or one batch file and the command line). How can one pass an environment variable name to the other so that it can read the variable? The following example does not work: A.BAT: @call b.bat path B.BAT: @echo %%1% > A.BAT > %1 > B.BAT path > %1 It is easy enough to pass the environment variable name, but the callee cannot seem to use it. (I don’t remember if or how I dealt with this the last time it came up, but I suspect it required the less-than-ideal use of redirecting temporary BAT files and calling them and such.) Any ideas? Thanks.

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• Hibernate - hibernate.hbm2ddl.auto = validate

  - by azp74

  I am interested in how hibernate.hbm2ddl.auto=validate actually works and I am struggling to find comprehensive documentation. We've recently discovered production system was affected by http://opensource.atlassian.com/projects/hibernate/browse/HHH-3532 (Hibernate matches foreign keys on name, rather than signature and so will recreate them for you) and hibernate.hbm2ddl.auto=update is being removed from our next release. I would be quite happy to just get rid of hibernate.hbm2ddl.auto altogether and manage our database ourselves. However, not all my colleagues share this world view and some are keen to add back in hibernate.hbm2ddl.auto=validate. I'm concerned this will hit the same problem and I'm interested in finding more documentation about how this validation actually works. The Hibernate Community Documentation (http://docs.jboss.org/hibernate/core/3.3/reference/en/html/session-configuration.html) really just makes reference to the values. Does anyone have any good documentation pointers, or any real life experience of using validate in a production system?

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• jQuery plug-in with additional methods.

  - by Kieron

  I've a jQuery plug-in that operates on some ULs, adding and removing classes etc. During the life-cycle of the page, I'll need to add/ remove some classes in code, and as my plug-in needs to perform some additional operations when this happens I came up with the following: // This is the initialiser method... $.fn.objectBuilder = function (options) {...}; // These are the two new methods I need. $.fn.objectBuilder.setSelected(element) {...}; $.fn.objectBuilder.removeSelected() {...}; I'd then like to call them like this: $("#ob1").objectbuilder.removeSelected(); Any thoughts? Thanks, Kieron edit I suppose what I'm asking is, whats the best way of adding additional methods to a jQuery plug-in where it'll have access to the root object, in this case #obj when the method is called.

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• Xcode is not building the Binary

  - by Stephen Furlani

  Hello, Xcode is doing something bizzare which I at one point in time fixed but now for the life of me I can't figure out what's wrong. Xcode is building my project fine - no errors on a clean-all build. All my product names and info.plists agree, all the settings appear to be correct. I've only got the one build configuration (I always delete all of them except when I got to actually release something - waay to many invisible problems with these things). Except that it is not generating binaries for my code. Eh wot? I have recently checked the code out on a new computer, and I checked all the paths and everything exists where it should. any help is appreciated. It is not throwing any errors and neither the binary for the .app nor the .plugin (project.app/Contents/MacOS/THERE IS NOTHING HERE). Thanks!!! -Stephen

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• Are some data structures more suitable for functional programming than others?

  - by Rob Lachlan

  In Real World Haskell, there is a section titled "Life without arrays or hash tables" where the authors suggest that list and trees are preferred in functional programming, whereas an array or a hash table might be used instead in an imperative program. This makes sense, since it's much easier to reuse part of an (immutable) list or tree when creating a new one than to do so with an array. So my questions are: Are there really significantly different usage patterns for data structures between functional and imperative programming? If so, is this a problem? What if you really do need a hash table for some application? Do you simply swallow the extra expense incurred for modifications?

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• MSBuild Starter Kits...

  - by vdh_ant

  Hi guys Just wondering if anyone knows if there are any MSBuild starter kits out there. What I mean by starter kits is that from the looks of it most builds to kinda the same sort of steps with minor changes here and there (i.e. most builds would run test, coverage, zip up the results, produce a report, deploy etc). Also what most people in general want from a CI build, test build, release build is mostly the same with minor changes here and there. Now don't get me wrong i think that most scripts are fairly different in the end. But I can't help but think that most start out life being fairly similar. Hence does anyone know of any "starter kits" that have like a dev/CI/test/release build with the common tasks that most people would want that you can just start changing and modifying? Cheers Anthony

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