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  • Custom class object in Initialization list

    - by Michael
    I have a class Bar: class Bar { public: Bar(void); ~Bar(void); }; And a class Foo that gets a reference to Bar object as a constructor parameter and needs to save it in a private member bar_ : class Foo { private: Bar& bar_; public: Foo(Bar& bar) : bar_(bar) {} ~Foo(void) {} }; This doesn't compile : overloaded member function not found in 'Parser' missing type specifier - int assumed. Note: C++ does not support default-int Now i suspect couple of things that i need to assure, the second error is for Bar& bar_; declaration in Foo. Do i need to use an explicit constructor when declaring bar_ ? I am interested in learning how the compiler works regarding this matter, so a detailed explanation would be highly appreciated. Thanks.

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  • Are raw C++ pointers first class objects?

    - by Shailesh Kumar
    According to Wikipedia: An object is first-class when it: can be stored in variables and data structures can be passed as a parameter to a subroutine can be returned as the result of a subroutine can be constructed at runtime has intrinsic identity (independent of any given name) Somebody had once told me that raw pointers are not first class objects while smart pointers like std::auto_ptr are. But to me, a raw pointer (to an object or to a function) in C++ does seem to me to satisfy the conditions stated above to qualify as a first class object. Am I missing something?

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  • exportDocument() 'destination folder does not exist' error

    - by dvb
    I'm trying to make a script in photoshop that will modify some layers and than export them as a PNG image. I've copied the following code from another place: function SavePNG(saveFile){ var pngOpts = new ExportOptionsSaveForWeb; pngOpts.format = SaveDocumentType.PNG pngOpts.PNG8 = false; pngOpts.transparency = true; pngOpts.interlaced = true; pngOpts.quality = 100; activeDocument.exportDocument(saveFile,ExportType.SAVEFORWEB,pngOpts); } The function export the active document of photoshop to the file specified by the saveFile parameter. It's working fine with simple paths like 'C:\images\result.png' but when trying with different paths like '~/Desktop/' or paths with some special characters the file isn't exported, and a 'destination folder does not exist' error massage appear. Any idea how can I solve it?

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  • how do I send stuff to method using the JQuery Ajax method

    - by nisardotnet
    $.ajax({ type: "POST", url: "WebService.asmx/AddVisitor", data: "{'fname':'dave', 'lname':'ward'}", contentType: "application/json; charset=utf-8", dataType: "json" }); I have an Asp.Net WebMethod that takes a firstName, lastName.....as a parameter, how do I send that stuff to that method using the JQuery Ajax method. if i hardcode the above it works without any problem but if i pass dynamic it fails var firstName = $("[id$='txtFirstName']"); var lastName = $("[id$='txtLastName']"); //data: "{'firstName':'Chris','lastName':'Brandsma'}"<br> data: "{'firstname':'" + escape(firstName.val()) + "','lastName':'" + escape(lastName.val()) + "'}", my WebMethod looks like this [WebMethod] public bool AddVisitor(string firstName, string lastName) { return true; } what wrong here? i have tried with eval and escape none of that works. Thanks for any help.

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  • Anonymous types based in Interface

    - by Bhaskar
    Can I create anonymous implementations of an interface , in a way similar to the way delegate() { // type impl here , but not implementing any interface} Something on the lines of new IInterface() { // interface methods impl here } The situations where I see them to be useful are for specifying method parameters which are interface types, and where creating a class type is too much code. For example , consider like this : public void RunTest() { Cleanup(delegate() { return "hello from anonymous type"; }); } private void Cleanup(GetString obj) { Console.WriteLine("str from delegate " + obj()); } delegate string GetString(); how would this be achieved if in the above code , the method Cleanup had an interface as a parameter , without writing a class definition ? ( I think Java allows expressions like new Interface() ... )

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  • How can I add Copperplate Gothic Bold font in my iPhone program ?

    - by srikanth rongali
    Hi, I need to display some text in cocos2d layer. I added UITextView to it. I added the text in the text View. But, for setting the font by ( UIFont class), I could not do it. I saw the list of supported fonts for iPhone, In that list Copperplate Gothic Bold is not there. I downloaded it from net. It is working good for CCLabel and CCFontMenuItem. How can I make it work for UILabel ? * Assertion failure in -[UILabel setFont:], /SourceCache/UIKit/UIKit-963.10/UILabel.m:445 2010-05-19 16:07:43.282 testOfGameScreen[1155:207] * Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'Invalid parameter not satisfying: font != nil' 2010-05-19 16:07:43.285 testOfGameScreen[1155:207] Stack: ( I am getting the above error when using UIFont with Copperplate Gothic Bold Thank you.

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  • Faster way to update 250k rows with SQL

    - by pablo
    I need to update about 250k rows on a table and each field to update will have a different value depending on the row itself (not calculated based on the row id or the key but externally). I tried with a parametrized query but it turns out to be slow (I still can try with a table-value parameter, SqlDbType.Structured, in SQL Server 2008, but I'd like to have a general way to do it on several databases including MySql, Oracle and Firebird). Making a huge concat of individual updates is also slow. What about creating a temp table and running an update joining my table and the tmp one? Will it work faster?

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  • What's void *userData exactly?

    - by mystify
    In a C function declaration, I have seen this parameter definition: void *userData so, what exactly is that? My guess: the void says it can be anything arbitrary, or even nothing. Almost similar to id of objective-c. It just allows to pass in whatever data structure you like. The star in front of userData says, that the argument must be passed in by reference. So when using this stuff in the function body, typically it must be casted and dereferenced. So if I pass in an pointer to SomeClass instance, I would get that like this: SomeClass *myObj = (SomeClass*)userData; In the case I had nothing special to pass along, I would provide NULL as argument. Are my assumptions correct? Or did I get something wrong?

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  • iPhone SDK - keep data in modal view

    - by swalkner
    Hi all, I've got a modal view loaded the following way: ModalViewController *modalController = [[ModalViewController alloc] initWithNibName:@"ModalViewController" bundle:nil]; searchController.delegate = self; [self.navigationController presentModalViewController:modalController animated:YES]; [modalController release]; When the modal view appears, "viewDidLoad" is called. When I dismiss the modal view via [self.navigationController dismissModalViewControllerAnimated:YES]; the method "viewDidUnload" ISN'T called, but the next time I let the modal view appear, "viewDidLoad" is called again. My problem now is that I'm creating an NSArray in the modal view's "viewDidLoad" - and as I'm fetching the data from the web, I would like to do it only once. But this way, it's fetched every time... Any hints how I could achieve that the data is only fetched once? I would really like to do it in the modal view and not in the parent and provide the array as parameter to the modal view... Thanks!

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  • Problem with "write" function in linux

    - by Dumitru Catalin
    I am trying to write 2 server/client programs under Linux, in which they communicate through named pipes. The problem is that sometimes when I try to write from the server into a pipe that doesn't exist anymore (the client has stopped), I get a "Resource temporarily unavailable" error and the server stops completely. I understand that this is caused by using a O_NONBLOCK parameter when opening the fifo chanel, indicating the point where the program would usually wait until it could write again in the file, but is there a way to stop this behavior, and not halt the entire program if a problem occurs (shouldn't the write command return -1 ad the program continue normally)? And another strange thing is that this error only occurs when running the programs outside the ide (eclipse). If I run both programs inside eclipse, on error the write function just returns -1 and the programs continues normally.

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  • php code for geeting paramenter and image from the post request

    - by abdulsamad
    Hi all can any one guide me how to get parameter specially image from the given post request. --0xKhTmLbOuNdArY Content-Disposition: form-data; name="source" lighttable --0xKhTmLbOuNdArY Content-Disposition: form-data; name="title" Google (The top search engine). --0xKhTmLbOuNdArY Content-Disposition: form-data; name="isbn" 9780077282073 --0xKhTmLbOuNdArY Content-Disposition: form-data; name="price" 5 --0xKhTmLbOuNdArY Content-Disposition: form-data; name="condition" Execlent --0xKhTmLbOuNdArY Content-Disposition: form-data; name="media" Content-Type: image/jpg Content-Transfer-Encoding: binary ÿØÿà NoTE:: ÿØÿà is the image in that request.

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  • c++ : list(vector) definition with array

    - by Meloun
    I have Class Email, there is parameter "bcc" in her construktor. Its actually list of emails for copies. There is no fixed number of these emails and later i have to have possibility to extend this list. //construktor prototype Email::Email(vector<string> bcc) So i want to use type vector or list for that and function push_back(). How can i make a new instance with bcc emails? I need actually declaration with definition for my list. I've found this definition with iterator for integer type: int myints[] = {16,2,77,29}; Email myEmail(vector<int> (myints, myints + sizeof(myints) / sizeof(int) )); , but its not very user friend and i need it with strings. Is there something like this? Email myEmail(vector<string> ("first","second","third"));

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  • how to fetch a range of files from an FTP server using C#

    - by user260076
    hello all, i'm stuck at a point where i am using a wildcard parameter with the FtpWebRequest object as suck FtpWebRequest reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri("ftp://" + ftpServerIP + "/" + WildCard)); now this works fine, however i now want to fetch a specific range of files. say the file naming structure is *YYYYMMDD.* and i need to fetch all the files prior to today's date. i've been searching for a wildcard pattern for that with no good results, one that will work in a simple file listing. and it doesn't look like i can use regex here. any thoughts ?

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  • Can't inherit from auto_ptr without problems

    - by fret
    What I want to do is this: #include <memory> class autostr : public std::auto_ptr<char> { public: autostr(char *a) : std::auto_ptr<char>(a) {} autostr(autostr &a) : std::auto_ptr<char>(a) {} // define a bunch of string utils here... }; autostr test(char a) { return autostr(new char(a)); } void main(int args, char **arg) { autostr asd = test('b'); return 0; } (I actually have a copy of the auto_ptr class that handles arrays as well, but the same error applies to the stl one) The compile error using GCC 4.3.0 is: main.cpp:152: error: no matching function for call to `autostr::autostr(autostr)' main.cpp:147: note: candidates are: autostr::autostr(autostr&) main.cpp:146: note: autostr::autostr(char*) I don't understand why it's not matching the autostr argument as a valid parameter to autostr(autostr&).

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  • How to validate a form reCaptcha in MVC C#

    - by Alexidze
    I have a page that contains several forms, by submitting each one of them, next form becomes visible. the last form contains a recaptcha validator, my problem starts here, if i declare an action result for that page like this [CaptchaValidator] public ActionResult myAction(SomeModel model, string lang) { return View("towing", model); } I'm getting an argument null exeption parameter "Challenge", which in fact means that you have to POST those fields from recaptcha for the validation to appear and I cannot post anyting untill the last for is visible and posted. then I've added a news ActionResult like myActionValidated, defined a route for it like: mypage/validate pointing to that actionresult and then i don't know where to go from here, i want simply do display a message if the reCaptcha did not validate and redirect to a URL if it succeeded. I hope I made myself clear. Thank you in advance

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  • NHibernate Criteria Transform Result

    - by isuruceanu
    Hi I have an SecurityGroup entity witch has Memebers and Application properties. Application is a lookup. So securityGroups is in many-to-many relationship with User table and one-to-many with LookupApplciation (FK) Now I want to select all application linked to a specific user. I have follow criteria: public IList<LookupApplication> GetApplicationByUser(User user) { return this.Session.CreateCriteria(typeof(SecurityGroup), "sg") .CreateAlias("Members", "u") .CreateAlias("Application", "al") .Add(Restrictions.Eq("u.Id", user.Id)) .List<LookupApplication>(); } It trows an exception The value "Edi.Advance.Core.Model.Security.SecurityGroup" is not of type "Edi.Advance.Core.Model.Lookups.LookupApplication" and cannot be used in this generic collection. Parameter name: value and it is right. How can I transform the result to IList<LookupApplication>? Thanks

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  • Interesting Row_Number() bug

    - by Joel Coehoorn
    I was playing with the Stack Exchange Data Explorer and ran this query: http://odata.stackexchange.com/stackoverflow/q/2828/rising-stars-top-50-users-ordered-on-rep-per-day Notice down in the results, rows 11 and 12 have the same value and so are mis-numbered, even though the row_number() function takes the same order by parameter as the query. I know the correct fix here is to specify an additional tie-breaker column in the order by clauses, but I'm more curious as to why/how the row_number() function returned different results on the same data? If it makes a difference anywhere, this runs on Azure.

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  • failure on creating a Scikits.TimeSeries object

    - by user311906
    Hi All I am trying to create a scikit.timeseries object starting from 2 datetime objects. If I understood correctly it should be possible to create a scikits.timeseries starting from datetime objects. I try the following code but it says that Insufficient parameters. The 2 datetime differs for few microseconds. In this case what should be the value for freq parameter? Is what I am trying allowed? In theory, since timeseries can be based on datetime objects it should be possible to hanlde up to microsecond , is this correct? I think that this is not really clear to me. Regards Eo import datetime import sckilits.timeseries as ts tm1 = datetime.datetime( 2010,1,1, 10,10,2, 123456 ) tm2 = datetime.datetime( 2010,1,1, 10,10,2, 345678 ) d = [ tm1, tm2 ] tseries = ts.time_series( dates=d ) tseries = ts.time_series( d )

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  • Using switch and enumerations as substitute for named methods

    - by MatthewMartin
    This pattern pops up a lot. It looks like a very verbose way to move what would otherwise be separate named methods into a single method and then distinguished by a parameter. Is there any good reason to have this pattern over just having two methods Method1() and Method2() ? The real kicker is that this pattern tends to be invoked only with constants at runtime-- i.e. the arguments are all known before compiling is done. public enum Commands { Method1, Method2 } public void ClientCode() { //Always invoked with constants! Never user input. RunCommands(Commands.Method1); RunCommands(Commands.Method2); } public void RunCommands(Commands currentCommand) { switch (currentCommand) { case Commands.Method1: // Stuff happens break; case Commands.Method2: // Other stuff happens break; default: throw new ArgumentOutOfRangeException("currentCommand"); } }

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  • Sending url params and POST body to a MVC 2 Controller

    - by Luiggi
    Hi, I'm having some issues trying to make a HTTP PUT (or POST) using WebClient against a MVC 2 controller. The exception is: The parameters dictionary contains a null entry for parameter 'total' of non-nullable type 'System.Int32' for method 'System.Web.Mvc.ActionResult Company(System.Guid, Int32, Int32, System.String)' The controller action is: [HttpPut] public ActionResult Company(Guid uid, int id, int total, string url) The route is: routes.MapRoute( "CompanySet", "job/active/{uid}/company/{id}", new { controller = "Job", action = "Company" } ); As you may see, what I want is to send the 'uid' and 'id' parameters via url, but the 'total' and 'url' parameters as part of the PUT or POST body. I've also tried to merge the latter parameters into a class (i.e., CompanySetMessage), doing it no longer raises an exception but I dont receive the values on the server side. Any ideas? Thank you!

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  • Is it possible to create an efficient UDF alternative to Excel's CUBEVALUE function?

    - by bright
    We'd like to create a simpler alternative to Excel's CUBEVALUE function for retrieving data from an OLAP server. The details aren't critical, but briefly, our function will "know" the source connection and accept a very simple ticker-like parameter and a date, in place of CUBEVALUE's MDX-style parameters. This is for internal use within our firm, just FYI. However, Excel has optimized CUBEVALUE so that calls to the OLAP server are batched. Question: Is there a way to code the new function so that it can similarly batch calls rather than issue a separate query for each cell?

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  • Address calling class

    - by Samuel
    I have an abstract class Moveable with the method abstract void move() which is extended by the class Bullet and the abstract class Character, and Character is extended by the class Survivor and the class Zombie. In Survivor and Bullet the move() method doesnt require any parameters while in the class Zombie the move() method depends on the actual position of the survivor. The survivor and multiple zombies are created in the class Gui. I wanted to access the survivor in Zombie - what's the best way of doing this? In Gui i wrote a method getSurvivor() but i don't see how to access this method in Zombie? I am aware that as a workaround i could just pass a [Survivor survivor] as parameter in move() and ignore it in Bullet and Survivor, but that feels so ... bad practice.

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  • How to ensure YouTube API only returns videos that are playable on iPhone?

    - by prendio2
    I'm building some YouTube search functionality into an iPhone app and want to ensure that I only receive results that will be playable on the device. According to the Searching for videos section in the API reference doc this seems to be relatively straightforward: The format parameter specifies that videos must be available in a particular video format. Your request can specify any of the following formats: I've currently set my project to only return videos with "format=1" which will limit to: RTSP streaming URL for mobile video playback. H.263 video (up to 176x144) and AMR audio. I'd love if someone could confirm that this is in fact the appropriate setting or let me know if I'm missing something. Cheers.

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  • What is the current standard for authenticating Http requests (REST, Xml over Http)?

    - by CodeToGlory
    The standard should solve the following Authentication challenges like- Replay attacks Man in the Middle Plaintext attacks Dictionary attacks Brute force attacks Spoofing by counterfeit servers I have already looked at Amazon Web Services and that is one possibility. More importantly there seems to be two most common approaches: Use apiKey which is encoded in a similar fashion like AWS but is a post parameter to a request Use Http AuthenticationHeader and use a similar signature like AWS. Signature is typically obtained by signing a date stamp with an encrypted shared secret. This signature is therefore passed either as an apiKey or in the Http AuthenticationHeader. I would like to know weigh both the options from the community, who may have used one or more and would also like to explore other options that I am not considering. I would also use HTTPS to secure my services.

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  • objective c - release problem

    - by amir
    Hello, I have the following code: NSNumber *number = [NSNumber numberWithInt:5]; int i = [number retainCount]; [number release]; i = [number retainCount]; [number release]; i = [number retainCount]; the problem is that in line 2 , the value of parameter i is 2 and in line 4 the value is 1. then in line 6 the value is still 1.???????? first i dont understand why after init *number the retaincount is 2 and not 1?? second i dont understand why after release it 2 times retaincount is not 0? it doesnt matter how many times i release the object the retaincount stay 1.

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