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  • [C++] Start a thread using a method pointer

    - by Michael
    Hi ! I'm trying to develop a thread abstraction (POSIX thread and thread from the Windows API), and I would very much like it to be able to start them with a method pointer, and not a function pointer. What I would like to do is an abstraction of thread being a class with a pure virtual method "runThread", which would be implanted in the future threaded class. I don't know yet about the Windows thread, but to start a POSIX thread, you need a function pointer, and not a method pointer. And I can't manage to find a way to associate a method with an instance so it could work as a function. I probably just can't find the keywords (and I've been searching a lot), I think it's pretty much what Boost::Bind() does, so it must exist. Can you help me ?

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  • UnknownHostException in java (that too only sometimes)

    - by Nitesh Panchal
    Hello, I am trying to read rss feed of Yahoo but i am unable to make it work properly. The code is absolutely correct , i am sure about it. It works sometimes but sometimes i get UnknownHostException. What can be the reason? Is there some problem with my internet or something else? This is my code :- public List<RssFeed> getRssFeed() { try { List<RssFeed> objList = new ArrayList<RssFeed>(); DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance(); DocumentBuilder db = dbf.newDocumentBuilder(); Document doc = db.parse("http://rss.news.yahoo.com/rss/india"); //doc.getDocumentElement().normalize(); Element docElement = doc.getDocumentElement(); NodeList objChannelList = docElement.getChildNodes(); for (int intIndex = 0; intIndex < objChannelList.getLength(); intIndex++) { if (objChannelList.item(intIndex).getNodeType() == Node.ELEMENT_NODE) { Element elemItem = (Element) objChannelList.item(intIndex); NodeList itemList = elemItem.getElementsByTagName("item"); //show only 3 news int count = itemList.getLength() > 3 ? 3 : objChannelList.getLength(); for (int intSubIndex = 0; intSubIndex < count; intSubIndex++) { NodeList itemDetailList = itemList.item(intSubIndex).getChildNodes(); String strTitle = ((Node) itemDetailList.item(RSS_VALUES.TITLE.getValue())).getFirstChild().getNodeValue(); String strdescription = ((Node) itemDetailList.item(RSS_VALUES.DESCRIPTION.getValue())).getFirstChild().getNodeValue(); String strLink = ((Node) itemDetailList.item(RSS_VALUES.LINK.getValue())).getFirstChild().getNodeValue(); //System.out.println(strTitle + "\n" + strdescription + "\n" + strLink + "\n\n\n\n"); objList.add(new RssFeed(strTitle, strdescription, strLink)); } } } return objList; } catch (SAXException ex) { Logger.getLogger(Utils.class.getName()).log(Level.SEVERE, null, ex); } catch (IOException ex) { Logger.getLogger(Utils.class.getName()).log(Level.SEVERE, null, ex); } catch (ParserConfigurationException ex) { Logger.getLogger(Utils.class.getName()).log(Level.SEVERE, null, ex); } return null; } Thanks in advance :). This problem has been bugging me since 1 month. Don't know why does Java in this case behave as per its mood :(

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  • jQuery changing images with animation and waiting for it to trigger hyperlink

    - by user1476298
    I want to switch images on .click() using the url attr I can do so, but I can't figure out how to make it wait, until the animation is done to redirect to the new webpage. Here's the js $(function() { $('.cv').click(function(){ $("#cv img").fadeOut(2000, function() { $(this).load(function() { $(this).fadeIn(); }); $(this).attr("src", "images/cv2.png"); return true; }); }); }); Here's the html: <div id="cv" class="img one-third column"> <a class="cv" target="#" href="cv.joanlascano.com.ar"> <img src="images/cv1.png" alt="Curriculum"/> <br />CV</a> </div> Thank you in advantage!

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  • Problem in to navigate on UITableView on the UIButtonClick which is present in UITabBarController sc

    - by Rajendra Bhole
    Hi, I develop an application in which i want to on UIButton Click the application navigate on UITableViewcontroller class.The UIButton is already on UITabBarController during the navigation the tab bar should be visible.The calling method in first tab bar controller class is, [appDelegate.nvcHome pushViewController:itemMenuTable animated:YES]; [itemMenuTable release]; itemMenuTable = nil; But it given me the following problem in GDB, Application tried to push a nil view controller on target . Also i want to display the icon and title of UITabBarController in programmatically, the code is, homeViewControllerLink = [[homeViewController alloc]initWithNibName:@"homeViewController" bundle:nil]; nvcHome = [[UINavigationController alloc]initWithRootViewController:homeViewControllerLink]; nvcHome.navigationBar.barStyle = UIStatusBarStyleBlackOpaque; UIImage *imgHomeTab = [UIImage imageNamed:@"home"]; [nvcHome.tabBarItem initWithTitle:@"Home" image:imgHomeTab tag:101]; [homeViewControllerLink release]; But it does not display when i running my app on iphone simulator.

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  • Unable to pass attribute from controller to view

    - by MDS
    I'm using Spring MVC 3 for a web app. In the app a URI template is supposed to be handled by a controller method, which then passes an attribute to a view. Currently, the controller does handle the request, and it even forwards to the correct view. However, it does NOT pass the attribute to the view. Below are the URI template, controller method and relevent jsp tags. Anyone see what is wrong? URI: /home/{status} Controller: @RequestMapping("/home") @Controller public class HomeController { ... ... @RequestMapping(value="/{status}") public String homeStatusView(@PathVariable("status") String status, ModelMap model) { model.addAttribute("status", status); return "home"; } } JSP: ... <c:if test="${not empty status}"> <span class="status">Your status is available...</span> </c:if> ...

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  • Parent selector in jquery

    - by matthewsteiner
    I have a table row that needs to be hidden when the anchor with class "removerow" is clicked. <tr><td>Product Name</td><td><a class="removerow">Remove</a></td></tr> I've been trying this, but it doesn't work: $("a.removerow").click(function(){ $(tr > this).hide(); }); How can I select the entire table row with a child of ".removerow". What am I doing wrong? Thanks.

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  • CSS Question - Any way to set (eg. a font-size) to a group of styles, by linking the style to anothe

    - by Joe
    .small_fonts{ font-size:10px; } .fonts_blue{ color:blue; } .fonts_red{ color:red; } .fonts_green{ color:green; } Any way to apply "small_fonts" to each of the "fonts_blue, _red, _green" w/o doing this: .fonts_blue, fonts_red, fonts_green { font-size:10px; } I am just trying to update my css to be more organized. I realised I don't need to define the font-size for each of the "small" fonts. When adding the class btw... I know you can do this: class="small_fonts fonts_blue" ~ however I'm talking about combining within the css stylesheet

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  • Not defined? Submit iframe from modal box post to iframe

    - by Steven
    Hello, I have <iframe src="correctdata.php" frameborder="0" width="100%" height="330" id="correctdata"></iframe> <div class="floatright"><a class="button bigger" onclick="window.frames['correctdata'].document.form['correct'].submit();">Submit</a></div> And correctdata.php contains a form <form method="post" action="correctdata.php" name="correct" id="correct"></form> (There is other stuff, but I'd much rather not post it. Yet when I press submit I get window.frames.correctdata is undefined [Break On This Error] window.frames.correctdata.document.form.correct.submit();

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  • Prevent "jQuery( html )" from triggering the browser to request images and other referenced content

    - by Chris Dutrow
    Using jQuery to create new DOM elements from text. Example: jQuery('<div><img src="/some_image.gif"></img></div>'); When this statement is executed, it causes the browser to request the file 'some_img.gif' from the server. Is there a way to execute this statement so that the resulting jQuery object can be used from DOM traversal, but not actually cause the browser to hit the server with requests for images and other referenced content? Example: var jquery_elememnts = jQuery('<div><img class="a_class" src="/some_image.gif"></img></div>'); var img_class = jquery_elememnts.find('img').attr('class'); The only idea I have now is to use regex to remove all of the 'src' tags from image elements and other things that will trigger the browser requests before using jQuery to evaluate the HTML. How can jQuery be used to evaluate HTML without triggering the browser to make requests to the server for referenced content inside the evaluated HTML? Thanks!

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  • How does make_pair know the types of its args?

    - by bobobobo
    The definition for make_pair in the MSVC++ "utility" header is: template<class _Ty1, class _Ty2> inline pair<_Ty1, _Ty2> make_pair(_Ty1 _Val1, _Ty2 _Val2) { // return pair composed from arguments return (pair<_Ty1, _Ty2>(_Val1, _Val2)); } I use make_pair all the time though without putting the argument types in angle brackets: map<string,int> theMap ; theMap.insert( make_pair( "string", 5 ) ) ; Shouldn't I have to tell make_pair that the first argument is std::string and not char* ? How does it know?

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  • How do I select the item with the highest value using LINQ?

    - by mafutrct
    Imagine you got a class like this: class Foo { string key; int value; } How would you select the Foo with the highest value from an IEnumeralbe<Foo>? A basic problem is to keep the number of iterations low (i.e. at 1), but that affects readability. After all, the best I could find was something along the lines of this: IEnumerable<Foo> list; Foo max = list.Aggregate ((l, r) => l.value > r.value ? l : r); Can you think of a more better way?

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  • Jquery, div with two classes hide one show the other - conflict?????

    - by user349223
    Sorry if this was answered in a previous thread, i couldn't find one. I have 4 sections: Section1, Section2, Section3, Section4 There are classes for each section, so I am hiding and showing based on the section. The problem is some classes need to be showin in Section1 and Section2. <div class="section1 section2"> blah blah </div> $('a.homeLink').click(function(){ $('.section1').show(); $('.section2, .section3, .section4').hide(); return false; }); As you see in this case I have a div in two sections, but as i thought would happen it remains hidden due to hiding class section2 work arounds or solutions?? thanks

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  • How to initialize std::vector from C-style array?

    - by dehmann
    What is the cheapest way to initialize a std::vector from a C-style array? Example: In the following class, I have a vector, but due to outside restrictions, the data will be passed in as C-style array: class Foo { std::vector<double> w_; public: void set_data(double* w, int len){ // how to cheaply initialize the std::vector? } Obviously, I can call w_.resize() and then loop over the elements, or call std::copy(). Are there any better methods?

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  • Why does var evaluate to System.Object in "foreach (var row in table.Rows)"?

    - by DanM
    When I enter this foreach statement... foreach (var row in table.Rows) ...the tooltip for var says class System.Object I'm confused why it's not class System.Data.DataRow. (In case you're wondering, yes, I have using System.Data at the top of my code file.) If I declare the type explicitly, as in... foreach (DataRow row in table.Rows) ...it works fine with no errors. Also if I do... var numbers = new int[] { 1, 2, 3 }; foreach (var number in numbers) ...var evaluates to struct System.Int32. So, the problem is not that var doesn't work in a foreach clause. So, there's something strange about DataRowCollection where the items don't automatically evaluate to DataRow. But I can't figure out what it is. Does anyone have an explanation?

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  • CString a = "Hello " + "World!"; Is it possible?

    - by Sanctus2099
    I'm making my own string class and I was wondering if there's any way to replace the compiler behaviour around " characters. As I said in the title I'd like to make it so that CString a = "Hello " + "World!"; would actually work and not give a compiler error telling that it can't add 2 pointers. My string class automatically converts to char* when needed and thus writing printf(a) would not break the code. I'm sure this is a rather weird question but if it's possible I'd really like to know how to do it. Thank you very much

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  • Include only the latest/newest associated record with active record?

    - by railsnewbie
    is it possible to load only the latest associated record of an associated table? an example: class author attr_accessible :first_name, :last_name, :birthday has_many :books end class book attr_accessible :pages, :date of publication, :title belongs_to :author end Is there a way to generate a scope to load only the newest released book the author wrote? Or the book with the most pages? I know, that I could include or join all books. But I don't know if its possible to load only a specific book for each author. So that I could do a query like this: Author.authors_and_their_newest_book So that I could get these results first_name_author_1, last_name_author_1, birthday_author_1, pages_book_3, date of publication_book_3, title_book_3 first_name_author_2, last_name_author_2, birthday_author_2, pages_book_5, date of publication_book_5, title_book_5 first_name_author_3, last_name_author_3, birthday_author_3, pages_book_9, date of publication_book_9, title_book_9 ...

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  • GWT : Composite not displaying

    - by animatrix30
    I have a this code for the layout : grid = new Grid(15, 15); tiles = new Tile[15][15]; for (int i = 0; i != 15; i++) { for (int j = 0; j != 15; j++) { tiles[i][j] = new Tile('a'); grid.setWidget(i, j, tiles[i][j]); tiles[i][j].setVisible(true); } } initWidget(grid); I know it is working, because if I change the tile, by a Button, it works well. Now my Tile class : public class Tile extends Composite { char character; public Tile (Character c) { this.character = c; buildWidget(); } private void buildWidget() { Label l = new Label(this.character+""); initWidget(l); } Why does all tiles are not displayed ? Thanks for your help !

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  • Access to related Objects inside a model propery

    - by aliem
    Hi, I just run into some problems with django models. Example code is better than any word: class Cart(models.Model): updated_at = models.DateTimeField(auto_now=True) created_at = models.DateTimeField(auto_now_add=True) def __unicode__(self): return u'date %s;'%(self.created_at) def __str__(self): return self.__unicode__() def _total_items(self): """ Totale n di oggetti """ a = 0 for i in self.items.all: a += i.quantity return a total_items = property(_total_items) class Item(models.Model): cart = models.ForeignKey(Cart) quantity = models.PositiveIntegerField() def __unicode__(self): return u'product %s'%(self.id) def __str__(self): return self.__unicode__() but, when i call the cart property here's what i get in the python console: >>> a.total_items Traceback (most recent call last): File "<console>", line 1, in <module> File "models.py", line 49, in _total_items for i in self.item_set.all: TypeError: 'RelatedManager' object is not callable

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  • What is the problem with this code?

    - by eSKay
    #include<stdio.h> class A { public: int a;}; class B: public A { public: static int b; B(){ b++; printf("B:%d\n",b); } }; int main() { A* a1 = new B[100]; A* a2 = new B(); return 0; } Error: In function `main': undefined reference to `B::b' undefined reference to `B::b' undefined reference to `B::b' undefined reference to `B::b'

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  • get look up a string given a func<T,object> param

    - by Sammy
    given this code namespace GridTests { public class Grid<T> { IEnumerable<T> DataSource { get; set; } IList<Column> Columns = new List<Column>(); class Column { public string DisplayText { get; set; } Func<T, object> Rowdata { get; set; } } } } I need to be able to loop through the columns collection and get the Rowdata's object value using the DisplayText. Thanks

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  • Why Controller doesn't recognize a public method which (yet) appears in the intellisense ?

    - by Richard77
    Hello, I'm using an helper class that I called CreateEditOrganizationService where I put all the helper methods. In my controller, I've createService as object of that class. So far, I've got 5 methods. Now, I've just defined a 6th method called Set_TypeOrganization. I'm getting the Set_TypeOrganization in the intellisense, but after I've chose it, I get the following error: *CreateEditOrganizationService does not contain a definition for Set_TypeOrganization are you missing a directive or a reference?* public List<TypeOrganization> Set_TypeOrganization(string choice) { //Definition goes here... } and in my Controller CreateEditOrganizationService createService = new CreateEditOrganizationService(); //... ViewData["TypeOrganizations"] = createService.Set_TypeOrganization(choice); Unfortunately, VS shows me the error? Yet, the method appear in the intellisense when I type a dot after the createService object. Thannks for helping

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  • jQuery: How do I insert an html string an arbitrary number of times (i.e. not with an each() function)?

    - by Sam Bivins
    I just need to take a certain html query object and append it to an html element a lot of times. I have this: var box = $("<div class='box'>&nbsp</div>"); $("#firstbox").after(box); and it works fine, but it just adds one 'box' after the #firstbox element. I'd like to do something like this: var box = $("<div class='box'>&nbsp</div>"); $("#firstbox").after(box * 6000); so that it will insert 6000 copies of that 'box' html, but this is not working. This is I'm sure the easiest thing to do, but I can't seem to find how to multiply actions like this without using the each() function, which doesn't apply here because I don't have 6000 of anything on my page. Thanks.

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  • allignment issue of div tag

    - by Quasar the space thing
    I am trying to create a web page where on click of a button I can add div tags. What I thought to do was that I'll create two div tags within a single div so that over all presentation will be uniform and similar to a table having two columns and multiple rows and the first column contains only label's and second column will contain textbox. Here is the JS file : var counter = 0; function create_div(type){ var dynDiv = document.createElement("div"); dynDiv.id = "divid_"+counter; dynDiv.class="main"; document.body.appendChild(dynDiv); question(); if(type == 'ADDTEXTBOX'){ ADDTEXTBOX(); } counter=counter+1; } function question(){ var question_div = document.createElement("div"); question_div.class="question"; question_div.id = "question_div_"+counter; var Question = prompt("Enter The Question here:", ""); var node=document.createTextNode(Question); question_div.appendChild(node); var element=document.getElementById("divid_"+counter); element.appendChild(question_div); } function ADDTEXTBOX(){ var answer_div = document.createElement("div"); answer_div.class="answer"; answer_div.id = "answer_div_"+counter; var answer_tag = document.createElement("input"); answer_tag.id = "answer_tag_"+counter; answer_tag.setAttribute("type", "text"); answer_tag.setAttribute("name", "textbox"); answer_div.appendChild(answer_tag); var element=document.getElementById("divid_"+counter); element.appendChild(answer_div); } Here is the css file : .question { width: 40%; height: auto; float: left; display: inline-block; text-align: justify; word-wrap:break-word; } .answer { padding-left:10%; width: 40%; height: auto; float: left; overflow: auto; word-wrap:break-word; } .main { width: auto; background-color:gray; height: auto; overflow: auto; word-wrap:break-word; } My problem is that the code is working properly but both the divisions are not coming in a straight line. after the first div prints on the screen the second divisions comes in another line. How can I make both the div's come in the same line ? Thank You. PS : should I stick with the current idea of using div or should I try some other approach ? like tables ?

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  • Is read-only auto-imlemented property possible?

    - by abatishchev
    Hello. I found a topic on MSDN that talks that yes, this is possible. I did a test that seems to break this statement: using System; namespace Test { class Program { static void Main(string[] args) { Foo f = new Foo("1"); Console.WriteLine(f.Bar); // prints 1 f.Test("2"); Console.WriteLine(f.Bar);// successfully prints 2 } } class Foo { public Foo(string b) { this.Bar = b; } public string Bar { get; private set; } public void Test(string b) { // this would be impossible for readonly field! // next error would be occur: CS0191 or CS0191 // A readonly field cannot be assigned to (except in a constructor or a variable initializer) this.Bar = b; } } } Where am I wrong?

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