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  • Regular expressions in c++ STL

    - by Radek Šimko
    Is there any native library in STL which is tested and works without any extra compiler options? I tried to use <regex>, but the compiler outputs this: In file included from /usr/include/c++/4.3/regex:40, from main.cpp:5: /usr/include/c++/4.3/c++0x_warning.h:36:2: error: #error This file requires compiler and library support for the upcoming ISO C++ standard, C++0x. This support is currently experimental, and must be enabled with the -std=c++0x or -std=gnu++0x compiler options.

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  • C++ stl collections or linked lists

    - by Lucas
    I'm developing a OpenGL based simulation in C++. I'm optmizing my code now and i see throughout the code the frequently use of std:list and std:vector. What is the more performatic: to continue using C++ stl data structs or a pointer based linked list? The main operation that involve std::list and std::vector is open a iterator and loop through all items in the data structs and apply some processing

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  • Memory Allocation by STL C++ Objects

    - by Vaibhav
    I am using malloc_stats() function to display the amount of "system bytes" and "in use" bytes used by the process. I wanted to know if the in use bytes also include the memory used by STL C++ Objects like map, vector, sets? If yes, is it safe to assume that this is only amount of memory that will be used by the process?

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  • OS X 10.6 won't automatically connect to wireless even though remember network is checked

    - by Hendy
    Upgraded to 10.6 recently. 10.5 would connect to my home network whenever I was home. 10.6 constantly pops up the network selection dialog and asks me what network I want to join. I click my home network and the password is already entered (so it "remembers" the network). "Remember network" is checked... but it does it every time. How do I get 10.6 to connect to networks automatically whenever it sees them?

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  • Get Checked RadioButtons using JavaScript

    - by Rudi
    so I’m trying to build a win 8 app, which includes a WebView. The WebView contains the HTML code (+JavaScript) below. <!DOCTYPE HTML PUBLIC " -//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <?xml version='1.0' encoding='UTF-8' standalone='yes'?> <html> <head> <meta http-equiv='Content-Type' content='text/html; charset=utf-8' > <script type='text/javascript'> function get_radio_value() { for (var i=0; i < document.myForm.frage1.length; i++) { if (document.orderform.frage1[i].checked) { var rad_val = document.myForm.frage1[i].value; return rad_val; } } } </script> <title>Kundenfragebogen</title> </head> <body> <h1>Kundenfragebogen</h1> <div id='myDiv'>Hello</div> <form name='myForm' action=''> <table border='2'> <tr> <td></td> <td>sehr gut</td> <td>gut</td> <td>schlecht</td> </tr> <tr> <td>Wie geht es Ihnen?</td> <td><input type='radio' name="frage1" value='1'/>Mir ging es noch nie besser!</td> <td><input type='radio' name="frage1" value='2'/>Es geht mir so wie immer.</td> <td><input type='radio' name="frage1" value='3'/>Heute geht einfach gar nichts…</td> </tr> <tr> <td>Können Sie Auto fahren?</td> <td><input type='radio' name="frage2" value='1'/>Ja</td> <td></td> <td><input type='radio' name="frage2" value='3'/>Nein</td> </tr> <tr> <td>Möchten Sie unseren Newsletter abonnieren?</td> <td><input type='radio' name="frage3" value='1'/>Ja</td> <td></td> <td></td> </tr> </table> <input type='button' value='Formular absenden' onclick="return get_radio_value()"/> </form> </body> </html> So the html contains some radio buttons and a button. I’ve used JavaScript ~2 years ago (just a little), so I don’t really know how to write the exact code. I’ve found something on the internet, but it doesn’t do what I want. I want to have the following: The user can check the RadioButtons. When the user clicks the Button, the JavaScript function should return all the checked radio buttons (I only need to know which RadioButton is checked). Since I know the name of the RadioButtons in my Windows 8 App, I can do the following: var object = WebView.InvokeScript("JavaScriptFunctionNAME", NameOfRadiobutton); So the WebView invokes the script and should get as a return the VALUE of the RadioButton, which is checked. “JavaScriptFunctionNAME” = name of the function in Javascript NameOfRadiobutton = the name of the RadioButton as a parameter (for example “frage1”). Currently I’m returning the value of the radiobutton, which is checked in the RadioGroup “frage1”. How can I check every RadioButton by it’s parameter? By this I mean I have a parameter “frage1” and return the value of the checked RadioButton. After this, I call the function again with the parameter “frage2” and return the checked RadioButtons value. Could anyone help me out with the JavaScript-function?

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  • How to check if a checkbox/ radio button is checked in php

    - by user225269
    I have this html code: <tr> <td><label><input type="text" name="id" class="DEPENDS ON info BEING student" id="example">ID</label></td> </tr> <tr> <td> <label> <input type="checkbox" name="yr" class="DEPENDS ON info BEING student"> Year</label> </td> </tr> But I don't have any idea on how do I check this checkboxes if they are checked using php, and then output the corresponding data based on the values that are checked. Please help, I'm thinking of something like this. But of course it won't work, because I don't know how to equate checkboxes in php if they are checked: <?php $con = mysql_connect("localhost","root","nitoryolai123$%^"); if (!$con) { die('Could not connect: ' . mysql_error()); } mysql_select_db("school", $con); $id = mysql_real_escape_string($_POST['idnum']); if($_POST['id'] == checked & $_POST['yr'] ==checked ){ $result2 = mysql_query("SELECT * FROM student WHERE IDNO='$id'"); echo "<table border='1'> <tr> <th>IDNO</th> <th>YEAR</th> </tr>"; while($row = mysql_fetch_array($result2)) { echo "<tr>"; echo "<td>" . $row['IDNO'] . "</td>"; echo "<td>" . $row['YEAR'] . "</td>"; echo "</tr>"; } echo "</table>"; } mysql_close($con); ?>

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  • C++ STL library in XCode - memset not defined in this scope

    - by Sharath
    I am trying to create a STL based C++ library in XCode with a bunch of C++ files that I have. Basically my end output should be a shared library (dylib) that can be consumed by a Objective-C application. When trying to compile, I get the following error.. 'memset' was not declared in scope. Since my codebase uses a lot of external 3rd party codebases, I thought i'll include or to resolve this, but I tried both and even that didn't work. Does it have something to do with the SDK? Am currently running 10.5 with GCC 4.2 Need help with setting up the Target properly. Any help is appreciated. Thanks.

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  • C++ boost or STL `y += f(x)` type algorithm

    - by aaa
    hello. I know I can do this y[i] += f(x[i]) using transform with two input iterators. however it seems somewhat counterintuitive and more complicated than for loop. Is there a more natural way to do so using existing algorithm in boost or Stl. I could not find clean equivalent. here is transform (y = y + a*x): using boost::lambda; transform(y.begin(), y.end(), x.begin(), y.begin(), (_1 + scale*_2); // I thought something may exist: transform2(x.begin(), x.end(), y.begin(), (_2 + scale*_1); // it does not, so no biggie. I will write wrapper Thanks

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  • Floating point comparison in STL, BOOST

    - by Paul
    Is there in the STL or in Boost a set of generic simple comparison functions? The one I found are always requiring template parameters, and/or instantiation of a struct template. I'm looking for something with a syntax like : if ( is_greater(x,y) ) { ... } Which could be implemented as : template <typename T> bool is_greater(const T& x, const T& y) { return x > y + Precision<T>::eps; }

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  • How to open links in new window ONLY IF the check box is checked

    - by Travis
    Here is what i have so far. I have it so they open in new windows, but i want it only if the check box is checked... <!DOCTYPE html> <html> <head> <script> function new() { if ( document.getElementById('checkbox').checked ) window.open( 'y', 'n', 't', 'New Window' ); } else { break; } var OpenNew = document.getElementById('opennew'); OpenNew.addEventListener('click', OpenWin, false ); </script> </head> <body> <p> <form name="test"> <p>Open link in a new window &nbsp; <input type="checkbox" id="checkbox" name="check" /></p> </form> </p> <p> <h2>My favorite Websites to visit</h2> <a href="http://www.youtube.com" target="new" id="y">Youtube</a><br /> <a href="http://www.newegg.com" target="new" id="n">Newegg</a><br /> <a href="http://www.twitch.tv" target="new" id="t">Twitch.tv</a><br /> </p> </body> </html> I am unsure how to actually do the if statement if it is checked then open. It does currently open in a new tab.. i just need it to be only when its checked. Any help with this will be greatly appreciated! Thanks!

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  • Can I use MFC objects in STL containers?

    - by Jesse Stimpson
    The following code doesn't compile for me in MSVC2005: std::vector<CMenu> vec(10); CMenu is an MFC menu object (such as a context menu). Through some testing I learned that CMenu does not have a public copy constructor. To do what I wanted to do, I needed to use a dynamic array. CMenu* menus = new CMenu[10]; // ... delete [] menus; Of course, now I've lost all the benefits of using an STL container. Do I have any other options?

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  • Adapting Map Iterators Using STL/Boost/Lambdas

    - by John Dibling
    Consider the following non-working code: typedef map<int, unsigned> mymap; mymap m; for( int i = 1; i < 5; ++i ) m[i] = i; // 'remove' all elements from map where .second < 3 remove(m.begin(), m.end(), bind2nd(less<int>(), 3)); I'm trying to remove elements from this map where .second < 3. This obviously isn't written correctly. How do I write this correctly using: Standard STL function objects & techniques Boost.Bind C++0x Lambdas I know I'm not eraseing the elements. Don't worry about that; I'm just simplifying the problem to solve.

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  • Scalable stl set like container for C++

    - by Pqr
    Hi, I need to store large number of integers. There can be duplicates in the input stream of integers, I just need to store distinct amongst them. I was using stl set initially but It went OutOfMem when input number of integers went too high. I am looking for some C++ container library which would allow me to store numbers with the said requirement possibly backed by file i.e container should not try to keep all numbers in-mem. I don't need to store this data persistently, I just need to find unique values amongst it.

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  • Set @Html.RadioButtonFor as Checked by default

    - by minchiya
    I am not able to set the default radio button to "Checked" ! I am using @Html.RadioButtonFor : <div id="private-user"> @Html.RadioButtonFor(m => m.UserType, "type1", new { @class="type-radio" , **@Checked="checked"** }) 1 </div> <div id="proff-user"> @Html.RadioButtonFor(m => m.UserType, "type2", new { @class="type-radio" }) 2 </div> Is it possible to set a radio button as cheched using @Html.RadioButtonFor ? Thx

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  • ASP.NET Binding integer to CheckBox's Checked field

    - by Sung Meister
    I have a following ListView item template, in which I am trying to bind integer value to Checked property of CheckBox. IsUploaded value contains only 0 and 1... <asp:ListView ID="trustListView" runat="server"> <ItemTemplate> <asp:CheckBox ID="isUploadedCheckBox" runat="server" Checked='<%# Bind("IsUploaded") %>' /> </ItemTemplate> </asp:ListView> But ASP.NET complains that Exception Details: System.InvalidCastException: Sepcified cast is not valid Even though following code using DataBinder.Eval() works, I need to have a 2-way binding, thus need to use Bind(). <asp:CheckBox ID="isUploadedCheckBox2" runat="server" Checked='<%# Convert.ToBoolean( DataBinder.Eval(Container.DataItem, "IsUploaded"))) %>' /> How can I convert 0's and 1's to boolean using Bind()? [ANSWER] I have extended auto-generated type through partial class by adding a new property mentioned in the answer by Justin

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  • edge case for selecting a checked radio input with jquery

    - by altvali
    Hi all! I have a problem selecting a checked radio button with jquery. The radio buttons are generated by a function from a MVC that i'd rather not change and its name is like id[number]. Simply put, I have to check if any of these buttons are checked: <input type="radio" name="id[1]" value="1"/ <input type="radio" name="id[1]" value="2"/ The problem is that jQuery('input:radio[name=id[1]]:checked').val() will select some function from the jQuery library. Any help will be much appreciated.

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  • Jquery - check if atleast one checkbox is checked

    - by Vincent
    All, I have the following HTML form and it can have many checkboxes. When the submit button is clicked, I want the user to get a javascript alert to check atleast one checkbox if none are checked. Is there an easy way to do this using Jquery? <form name = "frmTest" id="frmTest"> <input type="checkbox" value="true" checked="true" name="chk[120]"> <input type="checkbox" value="true" checked="true" name="chk[128]"> <input type="checkbox" name="chk[130]"> <input type="checkbox" name="chk[143]"> <input type="submit" name="btnsubmit" value="Submit"> </form> Thanks

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  • Check if checkbox is checked or not (ASPX)

    - by cthulhu
    I have the following code: (some.aspx.cs) if(Page.IsPostBack) { bool apple2 = false; bool pizza2 = false; bool orange2 = false; if (apple.Checked) apple2 = true; if (pizza.Checked) pizza2 = true; if (orange.Checked) orange2 = true; } (some.aspx) <tr> <td>Food:</td> <td>Apple <input type="checkbox" name="food" id="apple" value="apple" runat="server" />Pizza <input type="checkbox" name="food" id="pizza" value="pizza" runat="server" />Orange <input type="checkbox" name="food" id="orange" value="orange" runat="server" /></td> Now, i send the Boolean variables to SQL database. The problem is only with unchecked boxes. I mean, when you check some checkboxes it sends it as true (and that's right) but when i uncheck them it remains the same (true).

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  • STL in C++ how does it work

    - by helloWorld
    I have very technical question, I was working with C, and now I'm studying C++, if I have for example this class class Team { private: list<Player> listOfPlayers; public: void addPlayer(string firstName, string lastName, int id) { Player newPlayer(string firstName, string lastName, int id); listOfPlayers.push_back(Player(string firstName, string lastName, int id)); } } this is a declaration of the Player: class Player{ private: string strLastName; string strFirstName; int nID; public: Player(string firstName, string lastName, int id); } and this is my constructor of Player: Player::Player(string firstName, string lastName, int id){ nId = id; string strFirstName = firstName; string strLastName = lastName; } so my question is when I call function addPlayer what exactly is going on with program, in my constructor of Account do I need to allocate new memory for new Account(cause in C I always use malloc) for strFirstName and strLastName, or constructor of string of Account and STL do it without me, thanks in advance (if you don't want to answer my question please at least give me some link with information) thanks in advance

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  • Design of std::ifstream class

    - by Nawaz
    Those of us who have seen the beauty of STL try to use it as much as possible, and also encourage others to use it wherever we see them using raw pointers and arrays. Scott Meyers have written a whole book on STL, with title Effective STL. Yet what happened to the developers of ifstream that they preferred char* over std::string. I wonder why the first parameter of ifstream::open() is of type const char*, instead of const std::string &. Please have a look at it's signature: void open(const char * filename, ios_base::openmode mode = ios_base::in ); Why this? Why not this: void open(const string & filename, ios_base::openmode mode = ios_base::in ); Is this a serious mistake with the design? Or this design is deliberate? What could be the reason? I don't see any reason why they have preferred char* over std::string. Note we could still pass char* to the latter function that takes std::string. That's not a problem! By the way, I'm aware that ifstream is a typedef, so no comment on my title.:P. It looks short that is why I used it. The actual class template is : template<class _Elem,class _Traits> class basic_ifstream;

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  • STLifying C++ classes

    - by shambulator
    I'm trying to write a class which contains several std::vectors as data members, and provides a subset of vector's interface to access them: class Mesh { public: private: std::vector<Vector3> positions; std::vector<Vector3> normals; // Several other members along the same lines }; The main thing you can do with a mesh is add positions, normals and other stuff to it. In order to allow an STL-like way of accessing a Mesh (add from arrays, other containers, etc.), I'm toying with the idea of adding methods like this: public: template<class InIter> void AddNormals(InIter first, InIter last); Problem is, from what I understand of templates, these methods will have to be defined in the header file (seems to make sense; without a concrete iterator type, the compiler doesn't know how to generate object code for the obvious implementation of this method). Is this actually a problem? My gut reaction is not to go around sticking huge chunks of code in header files, but my C++ is a little rusty with not much STL experience outside toy examples, and I'm not sure what "acceptable" C++ coding practice is on this. Is there a better way to expose this functionality while retaining an STL-like generic programming flavour? One way would be something like this: (end list) class RestrictedVector<T> { public: RestrictedVector(std::vector<T> wrapped) : wrapped(wrapped) {} template <class InIter> void Add(InIter first, InIter last) { std::copy(first, last, std::back_insert_iterator(wrapped)); } private: std::vector<T> wrapped; }; and then expose instances of these on Mesh instead, but that's starting to reek a little of overengineering :P Any advice is greatly appreciated!

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  • Html.CheckBoxFor() checked problem in ASP.Net MVC 2

    - by inolen
    It doesn't seem that the Html.CheckBoxFor helper adds the correct "checked" attribute when rendering the HTML. I have a bool property rendered like so: <%= Html.CheckBoxFor(m => m.Visible) %> And the outputted HTML is this: <input type="checkbox" value="true" name="Visible" id="Visible"> Is there some particular reason it does not add the "checked" attribute when the value is true?

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  • Change color of CheckboxColumn if checked

    - by user896692
    Searched a lot about this problem but never found a answer, that solved it. I´ve got the following CheckboxColumn in a WPF datagrid: <DataGridCheckBoxColumn Header="Erledigt" Binding="{Binding Path=erledigt}" /> The variable erledigt contains 0 or 1. Now I want, that if the Checkbox is checked, the cellbackground is green. Hopelessly searched for a checked property. How can I manage this?

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