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  • C++ and C#, "Casting" Functions to Delegates, What's the scoop?

    - by Jacob G
    In C# 2.0, I can do the following: public class MyClass { delegate void MyDelegate(int myParam); public MyClass(OtherObject obj) { //THIS IS THE IMPORTANT PART obj.SomeCollection.Add((MyDelegate)MyFunction); } private void MyFunction(int myParam); { //... } } Trying to implement the same thing in C++, it appears I have to do: MyDelegate del = gcnew MyDelegate(this, MyFunction); obj-SomeCollection-Add(del); Obviously I can create a new instance of the delegate in C# as well instead of what's going on up there. Is there some kind of magic going on in the C# world that doesn't exist in C++ that allows that cast to work? Some kind of magic anonymous delegate? Thanks.

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  • JQuery Accordion - bottom-up in stead of top-down

    - by Tim Geerts
    Hi there, I have a question about the accordion plugin for jQuery. Basically, I've got it to work on my site nicely, there's just one thing that I'd have liked it to do and that is bottom-up opening in stead of top-down. What I mean by that is that my 3 buttons just stand in the vertical menu (div) in the bottom. And when you click it, they'll slide open but upwards, not downwards. Is there a way to achieve this easily? I've gone through the documentation, but can't find any native support for it, so I was wondering if it was possible to do it in the javascript of the plugin itself. Thanks in advance.

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  • Obtain the pathName dynamically for ASP.NET MVC

    - by vikitor
    Hello, I'm looking for a solution that allows me to get the parent page pathname from a partialView invoked. For example I have an Action baa and a controller boo so the javascript to obtain this will be window.location.pathname, and it returns /boo/baa. The thing is that I use a partial view, so when I try to retrieve the pathname via the URL helper, what I obtain is the PartialView one, and what I need is the pathname for the action that invokes it. I want to do this because I want to show certain things of the partial view depending on the pathname of the parent view that invokes it. Is there a way to do this with ASP.NET MVC? Thank you all in advance,

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  • JUnit 4 test suite problems

    - by Hypnus
    Hi, i have a problem with some JUnit 4 tests that i run with a test suite. If i run the tests individually they work with no problems but when run in a suite most of them, 90% of the test methods, fail with errors. What i noticed is that always the first tests works fine but the rest are failing. Another thing is that a few of the tests the methods are not executed in the right order (the reflection does not work as aspected - or it does because the retrieval of the methods is not necessarily in the created order). This usually happens if there is more than one test with methods that have the same name. I tried to debug some of the tests and it seems that from a line to the next the value of some attributes gets null. Does anyone know what is the problem, or if the behavior is "normal"? Thanks in advance.

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  • What's causing “Session state has created a session id, but cannot save it because the response was

    - by mike nelson
    I'm getting this fault intermittently. I found this link which summarises fairly well what I was able to find on the Google: http://www.wacdesigns.com/2009/02/03/session-state-has-created-a-session-id-but-cannot-save-it-because-the-response-was-already-flushed-by-the-application/ Basically it says you can try setting the web config setting DisplayWhenNewSession, or try kicking the session state thing into life by getting the Session.SessionID in the Session_OnStart. But does anyone: a) have an explanation for this or even better, b) have a tried and tested fix I realise that I can't flush the response after doing anything that would affect the http response header. If I did this it would cause an error every time but this is intermittent. The SessionID should surely be created by ASP.NET at the beginning of the page response automatically, before anything in the ASPX page or the Page_Load (which is where all my flushes are called).

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  • $("body").scrollTop() doesn't update in safari

    - by Kristoffer Nolgren
    I'm working on a website: http://beta.projektopia.se/ the body has several background-images that are updated on scroll like this: $(document).ready(function(){ $(document).scroll(function(){ var scrollfactor=$("body").scrollTop()*0.2; var centerscrollpos =scrollfactor+613; var docheight = $(document).height(); var windowheight = $(window).height(); var bottompos = (docheight-980)-((docheight-windowheight)*0.2)+scrollfactor; var scrollpos = 'center '+scrollfactor+'px,center '+bottompos+'px, center '+ centerscrollpos+'px,center 0px'; $("body").css("background-position", scrollpos); }); }); Lots of calculations, but the important thing is that a scrollpos is created that should change the position of the background when you scroll, to create a parallax-effect. It works great in chrome, but in firefox, the variable scrollfactor, that is suppose to get the current scroll-position, doesn't update. ps, some people have this issue due to lack of correct doctype. I believe i have declared it correctly like this: <!DOCTYPE html>

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  • sending javascript array to external php file using POST

    - by user1472224
    I am trying to send a javascript array to an external php page, but the only thing the php page is picking up is the fact that I am sending array, not the actual data within the array. javascript - var newArray = [1, 2, 3, 4, 5]; $.ajax({ type: 'POST', url: 'array.php', data: {'something': newArray}, success: function(){ alert("sent"); } }); External PHP Page - <?php echo($_POST['something'])); ?> I know this question has been asked before, but for some reason, this isn't working for me. I have spent the last couple days trying to figure this out as well. Can someone please point me in the right direction. current output (from php page) - Array (thats all the page outputs)

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  • My app crashes on Iphone SDK 3.2

    - by Mladen
    Hi Guys, My app worked ok on iPhone SDK 3.1. However, when I try to run it in 3.2 simulator, I get the following error and it crashes: bool _WebTryThreadLock(bool), 0x5148280: Tried to obtain the web lock from a thread other than the main thread or the web thread. This may be a result of calling to UIKit from a secondary thread. Crashing now... Program received signal: “EXC_BAD_ACCESS”. When I debug it, it leads me to this peace of code: - (void)LoginViewToCheckView:(id)sender { CheckViewController *tempTestController = [[CheckViewController alloc] initWithStyle:UITableViewStyleGrouped]; [tempTestController setDelegate:self]; [self setCheckViewController: tempTestController]; [tempTestController release]; [navigationController pushViewController:checkViewController animated:YES];} Other thing worth mentioning is maybe that I am calling this function from a separate thread. Any ideas what could be wrong?

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  • Can't find Peopleware anywhere?

    - by ooo
    Many folks say that Peopleware is one of the best books for software professionals and managers, as I see a lot of people recommending it in the "have to read list." The strange thing is that I can't find a bookstore anywhere that actually has it. I found it on Amazon, but Borders, Barnes & Nobles, etc. don't have it and keep telling me it's out of print. Can anyone shed some light on whats going on here? Amazon doesn't stock it, it says its available from a few 3rd party sellers, but I tried two of them and both of them eventually refunded me and cancelled the order after stalling for a month.

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  • Multithreading with STL container

    - by Steven
    I have an unordered map which stores a pointer of objects. I am not sure whether I am doing the correct thing to maintain the thread safety. typedef std::unordered_map<string, classA*>MAP1; MAP1 map1; pthread_mutex_lock(&mutexA) if(map1.find(id) != map1.end()) { pthread_mutex_unlock(&mutexA); //already exist, not adding items } else { classA* obj1 = new classA; map1[id] = obj1; obj1->obtainMutex(); //Should I create a mutex for each object so that I could obtain mutex when I am going to update fields for obj1? pthread_mutex_unlock(&mutexA); //release mutex for unordered_map so that other threads could access other object obj1->field1 = 1; performOperation(obj1); //takes some time obj1->releaseMutex(); //release mutex after updating obj1 }

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  • Pattern for iPhone background loading during init?

    - by Rob S.
    Hi everyone, I'm currently kicking off a background thread to do some REST queries in my app delegate's didFinishLaunchingWithOptions. This thread creates some objects and populates the model as the rest of the app continues to load (because I don't block, and didFinishLaunchingWithOptions returns YES). I also put up a loading UIViewController 'on top' of the main view that I tear down after the background initialization is complete. My problem is that I need to notify the first view (call it the Home view) that the model is ready, and that it should populate itself. The trick is that the background download could have finished before Home.viewDidAppear is called, or any of the other Home.initX methods. I'm having difficulty synchronizing all of this and I've thought about it long enough that it feels like I'm barking up the wrong tree. Are there any patterns here for this sort of thing? I'm sure other apps start by performing lengthy operations with loading screens :) Thanks!

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  • Autocomplete for generic types in Eclipse

    - by AvrDragon
    "Refer to objects by their interfaces" is a good practise, as mentioned in Effective Java. So for example i prefer List<String> al = new ArrayList<String>(); over ArrayList<String> al = new ArrayList<String>(); in my code. One annoying thing is that if i type ArrayList<String> al = new and then hit Ctrl+Space in Eclipse i get ArrayList<String>() as propostal. But if i type List al = new and then hit Ctrl+Space i will get only propostal to define anonymous inner class, but not propostals such as new ArrayList<String>(), what is 99% the case, or for example new Vector<String>(). Is there any way to get the subclasses as propostals for generic types?

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  • How to undo SQL changes using installer

    - by Sunil Agarwal
    I have installer to install procedures, scripts, views, etc in SQL server 2005/2008. Now I want to add a condition in the installer like if there is any error while installing, I want to undo all the changes done in SQL server. I tried to store the procedures, views, etc which I am changing while installing and reverting them back if I get any error. But am not able to do it the way I want. Can someone guide me if he had done the same thing? To specify I am using WIX installer. Also if someone has tried SMO, it will be of great help.

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  • SharePoint 2010 - two web applications - single sign on --> do I need claims based auth.?

    - by user333571
    Hi! We are planning to create two sharepoint web applications using SharePoint 2010 Enterprise Edition. All Users that have access to web app 1, should also be able to access web app 2. This authentication shall be powered by server 2003 active directory. -- do I need to use claims based authentication? If so -- can I use Windows Based Authentication with NTLM for that? The only thing I really want is that users navigating from web app 1 to web app 2 (and vice versa) do not have to authenticate twice. I do NOT want to configure Kerberos if it is not absolutely necessare though... Can you give me any hints? Thanks!

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  • Google Chrome "window.open" workaround?

    - by McBonio
    Hi Folks! I have been working on a web app and for part of it I need to open a new window. I have this working on all browsers, my sticking point is with Google Chrome. Chrome seems to ignore the window features which is causing me issues, the thing I'm struggling with is I need the address bar to be editable within the new window. FF, IE, Safari and Opera do this fine, Chrome does not. My Code: <script language="javascript" type="text/javascript"> <!-- function popitup(url) { newwindow=window.open(url,'name','toolbar=1,scrollbars=1,location=1,statusbar=0,menubar=1,resizable=1,width=800,height=600'); if (window.focus) {newwindow.focus()} return false; } // --> </script> Any help would be gratefully received! Thanks in advance :)

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  • Shell Screen -X Stuff problems

    - by user1621988
    OPTIONS="java -Xms1024M -Xmx1024M -jar craftbukkit.jar" PROCESS=server01 screen -dmS $PROCESS $OPTIONS nogui # Starting the application screen -x $PROCESS -X stuff `printf "stop\r"` # Closing the application screen -x $PROCESS # Attaching to the terminal of the application Starting the application work fine, however I got problems with stuff 'printf "stop/r"' It seems not to work when I just start up, wait some time and then try to Stop it with command above. But the strange thing is, that IF I did screen -x $PROCESS and detach (ctrl-A & ctrl-D) and then I use the Stop command it does work. So is there a way around to stuff printf without -screen -x the $PROCESS? Thank You in Advance

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  • get timestamp using OracleCachedRowSet

    - by chetan
    Code : OracleCachedRowSet rowSet = new OracleCachedRowSet(); ResultObject obj = new ResultObject(0,null); PreparedStatement pstat = connection.prepareStatement(strQry); rowSet.populate(pstat.executeQuery()); rowSet.beforeFirst(); while(rowSet.next()){ System.out.println("Conference name "+rowSet.getString(1)); System.out.println("StartTime "+rowSet.getTimestamp(5)) ; } When i run above code i got error like : java.sql.SQLException: Invalid column type at oracle.jdbc.rowset.OracleCachedRowSet.getTimestamp(OracleCachedRowSet.java:4399) at test.Test.main(Test.java:102) Same thing is working fine(check below correct code) if i use ResultSet instead of OracleCachedRowSet PreparedStatement pstat = connection.prepareStatement(strQry); ResultSet rset = pstat.executeQuery(); while(rset.next()){ System.out.println("Conference name "+rset.getString(1)); System.out.println("StartTime "+rset.getTimestamp(5)) ; } Is there any way to getTimestamp() using OracleCachedRowSet

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  • sqrt(int_value + 0.0) ? The point?

    - by Earlz
    Hello, while doing some homework in my very strange C++ book, which I've been told before to throw away, had a very peculiar code segment. I know homework stuff always throws in extra "mystery" to try to confuse you like indenting 2 lines after a single-statement for-loop. But this one I'm confused on because it seems to serve some real-purpose. basically it is like this: int counter=10; ... if(pow(floor(sqrt(counter+0.0)),2) == counter) ... I'm interested in this part especially: sqrt(counter+0.0) Is there some purpose to the +0.0? Is this the poormans way of doing a static cast to a double? Does this avoid some compiler warning on some compiler I do not use? The entire program printed the exact same thing and compiled without warnings on g++ whenever I left out the +0.0 part. Maybe I'm not using a weird enough compiler?

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  • improve my jquery validation plugin code

    - by Jared
    Hi All Just hoping soemone can help me to write better code than I can come up with on my own. I am using the jquery validation plugin. I have some fields that are mandatory ONLY if certain options are chosen. The below code works fine. But the thing is, is that that my list of 'OR's is much longer than I've put here. and it needs to be applied not just to 'directorsName' but a whole long list of inputs, selects etc. My question is.. how can I wrap up the code contained inside the RETURN? (so I dont have to keep repeating my 'OR's. I'm guessign I need a function but I'm unsure of the syntax) $("#myForm").validate({ rules: { directorsName : { required: function(element) { return ( $('#account_for').val() == "Joint" || $('#directors_number').val() == "2" || $('#directors_number').val() == "3" ); } } } }); Thanks in advance

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  • how to debug a query that has valid syntax, executes, but returns no results?

    - by Ty W
    So I'm writing a fairly involved query with a half dozen joins, a dependent subquery for [greatest-n-per-group] purposes, grouping, etc. It is syntactically valid, but I've clearly made at least one mistake because it returns nothing. In the past I've debugged valid queries that return nothing by removing joins, executing subqueries on their own, removing WHERE conditions, and removing grouping to see what I would get but so far this one has me stumped. Are there better tools or techniques to use for this sort of thing? This particular query is for MySQL if it matters for any platform-specific tools.

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  • Oracle curcular join sometimes give duplicates, but sometimes does not

    - by Kaushik
    By mistake I wrote a query like this: select * from a,b,c where a.col=b.col and b.col2=c.col2 and c.col3=a.col4 So there is a circular join here. Now the thing is sometimes this query returns duplicate result, sometimes it returns unique(correct) results. I am trying to understand why it does not give duplicate results always. Also if circular joins are not allowed, how come Oracle does not throw an error. EDIT: This is the actual query. After reading ti carefully, I am not sure anymore if this is a circular join or not.It does not seem so...but why I get duplicates only sometime? select * from a,b,c,d where a.col=b.col and b.col=c.col and c.col2=d.col2 and d.col2 =a.col2

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  • iphone threading speed up startup of app

    - by BahaiResearch.com
    I have an app that must get data from the Sqlite database in order to display the first element to the User. I have created a domain object which wraps the DB access and is a thread safe singleton. Is this following strategy optimal to ensure the fastest load given the iPhone's file access and memory management capabilities in threaded apps: 1) In the AppDelegate's FinishedLaunching event the very first thing I do is create the domain singleton within a new thread. This will cause the domain object to go to Sqlite and get the data it needs without locking the UI thread. 2) I then call the standard Window methods to add the View and MakeKeyAndVisible etc. Is there an earlier stage in the AppDelegate where I should fire off the thread that creates the Domain Object and accesses Sqlite?

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  • Build turns partially transparent image pixels black

    - by Sean O'Hollaren
    I'm very new to C# and I've run into a problem and haven't been able to solve it. I have a row of buttons that have .png images assigned to them. The images are in .png format to allow transparency, and smoothing the edges in GIMP leaves some semi-transparent pixels. I've set the Image List Toolbar (imglToolbar)'s properties to recognize "Transparent" as the designated color to show up as transparent. I'm working in Visual Studio 2005. The strange thing is that everything looks great when I'm viewing the Visual C# form preview window. The icons look exactly as they should. However, once I actually build the project, the buttons treat every semi-transparent pixel near the edge of the image as if it's black. It seems like it can't handle one that's both transparent and has color. Image of it via the Visual C# form editor: Image of what it looks like when built: Any ideas as to why this is happening?

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  • Membership systems for MVC4 that support RavenDB

    - by brad oyler
    I create a lot of quick "proof of concept" MVC apps and I actually found the SimpleMembership provider that shipped with the MVC4 templates to be very handy since it gets me up and running with user registration & OAuth in a matter of minutes. But...I've started to use RavenDb (on RavenHQ for a lot for my projects). So, I starting trying to implement my own "custom membership provider" based on the ExtendedMembershipProvider and while doing that I realized that didn't make much sense. I later stumbled upon 2 interesting projects that try to solve this exact problem: WorldDomination.Web.Auth: https://github.com/PureKrome/WorldDomination.Web.Authentication MemFlex: https://github.com/OdeToCode/Memflex Both are pretty interesting recent efforts and was wondering if these are the only ones being built right now. I'm essentially looking for nuget pkg that I can drop into a MVC4 app, connect to my RavenDb and be done. I'm willing to build this thing but don't want to duplicate any efforts that are already in motion. Thx!

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  • Working with multiple jQuery libraries and Prototype.

    - by Derek
    Ok, i saw some other posts about this sort of thing, but not exactly related. This is not what I want to do, but need to do unfortunately. We have in this order right now Prototype 1.6 jQuery 1.2.6 with noConflict on jQuery with j I need to add jQuery 1.4.2 in that mix as well. It will always be the last one loaded. No option. Is there anyway i can do this currently? I know this is not good, yada, yada, but it has to be done for now unfortunately. Thanks, Derek

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