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  • PHP Session Id changes between pages

    - by willl69
    Hi All, I have a problem where i am losing the PHP session between 2 pages. The session_start() is included in a file called session-inc.php into every page requiring a session to be set. This works for all pages on the site except one particular page, member-profile.php. When this page is visited a new session with a different id (same session name) is set and used instead. A few more details: Session name is set manually All pages are on the same server under the same domain name If i put an additional session_start() above the include('session-inc.php') in the member-profile.php file, the session is carried over correctly I have tried setting the session_cookie_domain and session.session_name in the .htaccess, this worked for this domain but it stopped the session being passed over to out payment domain We are running apache 2.2.6 with php 5.2.5 Putting the session_start() above the include('session-inc.php') in the member-profile.php file is the quick and dirty fix for this problem, but i am wondering if anybody know why this would be happening. Cheers Will

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  • What is sys/user.h used for ?

    - by dada
    I was inspecting the code of a linux application and i saw the #include in one of the code files. I tried looking it up on opengroup.org but i couldn't find it there, this is what the sys directory looks like: http://www.opengroup.org/onlinepubs/000095399/basedefs/sys/ . I guess it's not standard header file, but i checked it in my /usr/include/sys and it was there. What does it do and what it is used for ? If you can provide me with some manual for it, i would be grateful. Thanks.

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  • Matrix multiplication using Matrix Template library (MTL 4)

    - by Lxc
    The program is as following: #include <iostream> #include <boost/numeric/mtl/mtl.hpp> using namespace mtl; int main(int argc, char* argv[]) { dense_vector<double> a(5,1.0); dense_vector<double> b(5,2.0); a * trans(b); } I want to calculate a * trans(b), but there is a compling error :C2893. Will someone help me? Thanks a lot!

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  • How can I add a header folder to my project?

    - by VansFannel
    I'm developing an iOS application with latest Xcode 4.5.2. I have the following folder structure: /.../SourceCode/MyProjectFolder/projectName.xcodeproject /.../SourceCode/MyProjectFolder/projectName/ /.../SourceCode/MyProjectFolder/projectName/xxx.m /.../SourceCode/MyProjectFolder/projectName/xxx.h /.../SourceCode/MyProjectFolder/projectName/PVRT/ /.../SourceCode/MyProjectFolder/projectName/PVRT/header1.h /.../SourceCode/MyProjectFolder/projectName/PVRT/OtherFolder/header2.h If in my header files I add this: #include "header1.h" I get a "header1.h" not found error. But, if I add: #include "PVRT/header1.h" I get a "header2.h" not found. On project settings I have add the following path: ${SOURCE_ROOT}/projectName/PVRT But I'm getting the same error. How can I fix this?

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  • delete,copy,rename files and directories in WINAPI ..?

    - by Kristian
    hi I made a code that search in a givin path for a certain file name or folder and print the value BUT now how can i modify it to instead of printing its name perform on of the operations ( delete,copy,rename ) I searched on google and found nothin. #include "stdafx.h" #include <windows.h> int _tmain(int argc, _TCHAR* argv[]) { TCHAR *fn; fn=L"d:\\*"; HANDLE f; WIN32_FIND_DATA data; f=FindFirstFile(fn,&data); if(f==INVALID_HANDLE_VALUE){ printf("not found\n"); return 0; } else{ _tprintf(L"found this file: %s\n",data.cFileName); } while(FindNextFile(f,&data)){ { _tprintf(L"found this file: %s\n",data.cFileName); } } } FindClose(f); return 0; }

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  • searching for hidden files using winapi

    - by Kristian
    HI i want to search for a hidden files and directories in a specefic given path but I don't know how to do it for hidden files i do know how to search for normal files and dir i did this code but im stuck can't make it search for only hidden files #include "stdafx.h" #include <windows.h> int _tmain(int argc, _TCHAR* argv[]) { TCHAR *fn; fn=L"d:\\*"; HANDLE f; WIN32_FIND_DATA data; { FILE_ATTRIBUTE_HIDDEN; } f=FindFirstFile(fn,&data); if(f==INVALID_HANDLE_VALUE){ printf("not found\n"); return 0; } else{ _tprintf(L"found this file: %s\n",data.cFileName); while(FindNextFile(f,&data)){ _tprintf(L"found this file: %s\n",data.cFileName); } } FindClose(f); return 0; }

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  • Whats wrong with the following code, its not compiling

    - by Ganesh Kundapur
    #include <iostream> #include <vector> using namespace std; class Base { public: void Display( void ) { cout<<"Base display"<<endl; } int Display( int a ) { cout<<"Base int display"<<endl; return 0; } }; class Derived : public Base { public: void Display( void ) { cout<<"Derived display"<<endl; } }; void main() { Derived obj; obj.Display(); obj.Display( 10 ); } $test1.cpp: In function ‘int main()’: test1.cpp:35: error: no matching function for call to ‘Derived::Display(int)’ test1.cpp:24: note: candidates are: void Derived::Display() On commenting obj.Display(10), it works.

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  • syntax error, unexpected ',', expecting ')' RoR

    - by McDoku
    I am trying to get a collection select from an another model and I keep getting the above error. Looked everywhere, got rails casts but nothing makes sense. _form.rb <%= f.label :city %><br /> <%= f.collection_select (:share ,:city_id, City.all , :id, :name ) %> It highlights 'form' on the error report <h1>New share</h1> <%= render 'form' %> <%= link_to 'Back', shares_path %> Here are my models... class Share include Mongoid::Document field :name, type: String field :type, type: String field :summary, type: String field :description, type: String field :city, type: String embedded_in :city has_many :category end class City include Mongoid::Document embedded_in :share field :name, type: String field :country, type: String attr_accessible :name, :city_id, :id end Searched everywhere and I cannot figure it out. It must be something silly.

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  • How to use SOCI C++ Database library?

    - by NeDark
    I'm trying to implement soci in my program but I don't know how. I'm using C++ on linux, on a project on netbeans. I have followed the steps in http://soci.sourceforge.net/doc/structure.html to install it, and I tried to copy the files soci.h from /src/core and soci-mysql.h from /src/backends/mysql in my proyect but it gives compilation error (these files include other soci files, but it's illogical to copy all files into the directory...). I have read the guide several time but I don't understand what I'm doing wrong, the examples only include these files. Thanks. Edit: I have given more information in a comment below the answer. I don't know what steps I have to do to implement soci.

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  • algorithm to combine data for linear fit?

    - by BoldlyBold
    I'm not sure if this is the best place to ask this, but you guys have been helpful with plenty of my CS homework in the past so I figure I'll give it a shot. I'm looking for an algorithm to blindly combine several dependent variables into an index that produces the best linear fit with an external variable. Basically, it would combine the dependent variables using different mathematical operators, include or not include each one, etc. until an index is developed that best correlates with my external variable. Has anyone seen/heard of something like this before? Even if you could point me in the right direction or to the right place to ask, I would appreciate it. Thanks.

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  • why this signal handler is called infinitely

    - by lz_prgmr
    I am using Mac OS 10.6.5, g++ 4.2.1. And meet problem with following code: #include <iostream> #include <sys/signal.h> using namespace std; void segfault_handler(int signum) { cout << "segfault caught!!!\n"; } int main() { signal(SIGSEGV, segfault_handler); int* p = 0; *p = 100; return 1; } It seems the segfault_handler is called infinitely and keep on print: segfault caught!!! segfault caught!!! segfault caught!!! ... I am new to Mac development, do you have any idea on what happened?

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  • Swap image with jquery and show zoom image

    - by Neil Bradley
    Hi there, On my site I have 4 thumbnail product images that when clicked on swap the main image. This part is working okay. However, on the main image I'm also trying to use the jQZoom script. The zoom script works for the most part, except that the zoomed image always displays the zoom of the first image, rather than the one selected. This can be seen in action here; http://www.wearecapital.com/productdetails-new.asp?id=6626 I was wondering if someone might be able to suggest a solution? My code for the page is here; <% if session("qstring") = "" then session("qstring") = "&amp;rf=latest" maxProducts = 6 prodID = request("id") if prodID = "" or not isnumeric(prodid) then response.Redirect("listproducts.asp?err=1" & session("qstring")) else prodId = cint(prodId) end if SQL = "Select * from products,subcategories,labels where subcat_id = prod_subcategory and label_id = prod_label and prod_id = " & prodID set conn = server.CreateObject("ADODB.connection") conn.Open(Application("DATABASE")) set rs = conn.Execute(SQL) if rs.eof then ' product is not valid name = "Error - product id " & prodID & " is not available" else image1 = rs.fields("prod_image1") image1Desc = rs.fields("prod_image1Desc") icon = rs.fields("prod_icon") subcat = rs.fields("prod_subcategory") image2 = rs.fields("prod_image2") image2Desc = rs.fields("prod_image2Desc") image3 = rs.fields("prod_image3") image3Desc = rs.fields("prod_image3Desc") image4 = rs.fields("prod_image4") image4Desc = rs.fields("prod_image4Desc") zoomimg = rs.Fields("prod_zoomimg") zoomimg2 = rs.Fields("prod_zoomimg2") zoomimg3 = rs.Fields("prod_zoomimg3") zoomimg4 = rs.Fields("prod_zoomimg4") thumb1 = rs.fields("prod_preview1").value thumb2 = rs.fields("prod_preview2").value thumb3 = rs.fields("prod_preview3").value thumb4 = rs.fields("prod_preview4").value end if set rs = nothing conn.Close set conn = nothing %> <!-- #include virtual="/includes/head-product.asp" --> <body id="detail"> <!-- #include virtual="/includes/header.asp" --> <script type="text/javascript" language="javascript"> function switchImg(imgName) { var ImgX = document.getElementById("mainimg"); ImgX.src="/images/products/" + imgName; } </script> <script type="text/javascript"> $(document).ready(function(){ var options = { zoomWidth: 466, zoomHeight: 260, xOffset: 34, yOffset: 0, title: false, position: "right" //and MORE OPTIONS }; $(".MYCLASS").jqzoom(options); }); </script> <!-- #include virtual="/includes/nav.asp" --> <div id="column-left"> <div id="main-image"> <% if oldie = false then %><a href="/images/products/<%=zoomimg%>" class="MYCLASS" title="MYTITLE"><img src="/images/products/<%=image1%>" title="IMAGE TITLE" name="mainimg" id="mainimg" style="width:425px; height:638px;" ></a><% end if %> </div> </div> <div id="column-right"> <div id="altviews"> <h3 class="altviews">Alternative Views</h3> <ul> <% if oldie = false then writeThumb thumb1,image1,zoomimg,image1desc writeThumb thumb2,image2,zoomimg2,image2desc writeThumb thumb3,image3,zoomimg3,image3desc writeThumb thumb4,image4,zoomimg4,image4desc end if %> </ul> </div> </div> <!-- #include virtual="/includes/footer-test.asp" --> <% sub writeThumb(thumbfile, imgfile, zoomfile, thumbdesc) response.Write "<li>" if thumbfile <> "65/default_preview.jpg" and thumbfile <> "" and not isnull(thumbfile) then if imgFile <> "" and not isnull(imgfile) then rimgfile = replace(imgfile,"/","//") else rimgfile = "" if thumbdesc <> "" and not isnull(thumbdesc) then rDescription = replace(thumbdesc,"""","&quot;") else rDescription = "" response.write "<img src=""/images/products/"& thumbfile &""" style=""cursor: pointer"" border=""0"" style=""width:65px; height:98px;"" title="""& rDescription &""" onclick=""switchImg('" & rimgfile & "')"" />" & vbcrlf else response.write "<img src=""/images/products/65/default_preview.jpg"" alt="""" />" & vbCrLF end if response.write "</li>" & vbCrLF end sub %>

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  • please help me to find Bug in my Code (segmentation fault)

    - by Vikramaditya Battina
    i am tring to solve this http://www.spoj.com/problems/LEXISORT/ question it working fine in visual studio compiler and IDEone also but when i running in SPOJ compiler it is getting SEGSIGV error Here my code goes #include<stdio.h> #include<stdlib.h> #include<string.h> char *getString(); void lexisort(char **str,int num); void countsort(char **str,int i,int num); int main() { int num_test; int num_strings; char **str; int i,j; scanf("%d",&num_test); for(i=0;i<num_test;i++) { scanf("%d",&num_strings); str=(char **)malloc(sizeof(char *)*num_strings); for(j=0;j<num_strings;j++) { str[j]=(char *)malloc(sizeof(char)*11); scanf("%s",str[j]); } lexisort(str,num_strings); for(j=0;j<num_strings;j++) { printf("%s\n",str[j]); free(str[j]); } free(str); } return 0; } void lexisort(char **str,int num) { int i; for(i=9;i>=0;i--) { countsort(str,i,num); } } void countsort(char **str,int i,int num) { int buff[52]={0,0},k,x; char **temp=(char **)malloc(sizeof(char *)*num); for(k=0;k<52;k++) { buff[k]=0; } for(k=0;k<num;k++) { if(str[k][i]>='A' && str[k][i]<='Z') { buff[(str[k][i]-'A')]++; } else { buff[26+(str[k][i]-'a')]++; } } for(k=1;k<52;k++) { buff[k]=buff[k]+buff[k-1]; } for(k=num-1;k>=0;k--) { if(str[k][i]>='A' && str[k][i]<='Z') { x=buff[(str[k][i]-'A')]; temp[x-1]=str[k]; buff[(str[k][i]-'A')]--; } else { x=buff[26+(str[k][i]-'a')]; temp[x-1]=str[k]; buff[26+(str[k][i]-'a')]--; } } for(k=0;k<num;k++) { str[k]=temp[k]; } free(temp); }

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  • how to compile youtube-api appliation

    - by Gpathy
    Hi, i am developing a custom Youtube video player. But i am not able to compile the program. I am missing something in Makefile. My program looks like main.c #include<gdata/services/youtube/gdata-youtube-service.h> int main(int argc, char **argv[]) { printf("Youtube Application\n"); return 0; } makefile gcc `pkg-config --cflags --libs libgdata-google-1.2`  -lgdata-google-1.2 main.c -o youtube When i compile, it is giving error like error: gdata/services/youtube/gdata-youtube-service.h: No such file or directory Do i got to install some other packages ? Or, i need to include something in my Makefile ? Thanks...

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  • <= vs < when proving big-o notation

    - by user600197
    We just started learning big-o in class. I understand the general concept that f(x) is big-o of g(x) if there exists two constants c,k such that for all xk |f(x)|<=c|g(x)|. I had a question whether or not it is required that we include the <= to sign or whether it is just sufficient to put the < sign? For example: suppose f(x)=17x+11 and we are to prove that this is O(x^2). Then if we take c=28 and xk=1 we know that 17x+11<=28x^2. So since we know that x will always be greater than 1 this implies that 28x^2 will always be greater than 17x+11. So, do we really need to include the equal sign (<=) or is it okay if we just write (<)? Thanks in advance.

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  • problem with extern variable

    - by sksingh73
    I have got 2 cpp files & a header file, which I have included in both cpp files. It's like this: abc.h extern uint32_t key; a.cpp #include "abc.h" uint32_t key; int main { ............. } b.cpp #include "abc.h" int main { printf("Key: %.8x\n", key); ............. } Now when I compile a.cpp, there is no error. but when i compile b.cpp it gives error "undefined reference to `key'". Please help me in finding the problem in this code.

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  • Is typeid of type name always evaluated at compile time in c++ ?

    - by cyril42e
    I wanted to check that typeid is evaluated at compile time when used with a type name (ie typeid(int), typeid(std::string)...). To do so, I repeated in a loop the comparison of two typeid calls, and compiled it with optimizations enabled, in order to see if the compiler simplified the loop (by looking at the execution time which is 1us when it simplifies instead of 160ms when it does not). And I get strange results, because sometimes the compiler simplifies the code, and sometimes it does not. I use g++ (I tried different 4.x versions), and here is the program: #include <iostream> #include <typeinfo> #include <time.h> class DisplayData {}; class RobotDisplay: public DisplayData {}; class SensorDisplay: public DisplayData {}; class RobotQt {}; class SensorQt {}; timespec tp1, tp2; const int n = 1000000000; int main() { int avg = 0; clock_gettime(CLOCK_REALTIME, &tp1); for(int i = 0; i < n; ++i) { // if (typeid(RobotQt) == typeid(RobotDisplay)) // (1) compile time // if (typeid(SensorQt) == typeid(SensorDisplay)) // (2) compile time if (typeid(RobotQt) == typeid(RobotDisplay) || typeid(SensorQt) == typeid(SensorDisplay)) // (3) not compile time ???!!! avg++; else avg--; } clock_gettime(CLOCK_REALTIME, &tp2); std::cout << "time (" << avg << "): " << (tp2.tv_sec-tp1.tv_sec)*1000000000+(tp2.tv_nsec-tp1.tv_nsec) << " ns" << std::endl; } The conditions in which this problem appear are not clear, but: - if there is no inheritance involved, no problem (always compile time) - if I do only one comparison, no problem - the problem only appears only with a disjunction of comparisons if all the terms are false So is there something I didn't get with how typeid works (is it always supposed to be evaluated at compilation time when used with type names?) or may this be a gcc bug in evaluation or optimization? About the context, I tracked down the problem to this very simplified example, but my goal is to use typeid with template types (as partial function template specialization is not possible). Thanks for your help!

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  • How to Create C++ Project Filter/Folder in Visual Studio?

    - by BSalita
    Using Visual Studio 2012, I'd like to create a C++ project folder called "Include Files", which has the same characteristics as the well known folder "Header Files". That is, the files in Include Files have a cpi extenson and will be parsed out for use with InteliSense, and also can be precompiled. I'm able to create the folder but files within it aren't parsed. I've tried setting the type to C++ Header file. Nothing seems to work. The files work fine when given a hpp extension and put into Header Files folder.

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  • Output Unicode to Console Using C++

    - by Jesse Foley
    I'm still learning C++, so bear with me and my sloppy code. The compiler I use is Dev C++. I want to be able to output Unicode characters to the Console using cout. Whenver i try things like: # #include directive here (include iostream) using namespace std; int main() { cout << "Hello World!\n"; cout << "Blah blah blah some gibberish unicode: ÐAßGg\n"; system("PAUSE"); return 0; } It outputs strange characters to the console, like µA¦Gg. Why does it do that, and how can i get to to display ÐAßGg? Or is this not possible with Windows?

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  • Why this C program outputs a negative number?

    - by JMSA
    I have assigned the complement value in an unsigned variable. Then why this C program outputs a negative number? #include<stdio.h> #include<conio.h> int main() { unsigned int Value = 4; /* 4 = 0000 0000 0000 0100 */ unsigned int result = 0; result = ~ Value; /* -5 = 1111 1111 1111 1011 */ printf("result = %d", result); /* -5 */ getch(); return 0; }

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  • Returning and printing string array index in C

    - by user1781966
    I've got a function that searches through a list of names and I'm trying to get the search function to return the index of the array back to the main function and print out the starting location of the name found. Everything I've tried up to this point either crashes the program or results in strange output. Here is my search function: #include<stdio.h> #include<conio.h> #include<string.h> #define MAX_NAMELENGTH 10 #define MAX_NAMES 5 void initialize(char names[MAX_NAMES][MAX_NAMELENGTH], int Number_entrys, int i); int search(char names[MAX_NAMES][MAX_NAMELENGTH], int Number_entrys); int main() { char names[MAX_NAMES][MAX_NAMELENGTH]; int i, Number_entrys,search_result,x; printf("How many names would you like to enter to the list?\n"); scanf("%d",&Number_entrys); initialize(names,Number_entrys,i); search_result= search(names,Number_entrys); if (search_result==-1){ printf("Found no names.\n"); }else { printf("%s",search_result); } getch(); return 0; } void initialize(char names[MAX_NAMES][MAX_NAMELENGTH],int Number_entrys,int i) { if(Number_entrys>MAX_NAMES){ printf("Please choose a smaller entry\n"); }else{ for (i=0; i<Number_entrys;i++){ scanf("%s",names[i]); } } } int search(char names[MAX_NAMES][MAX_NAMELENGTH],int Number_entrys) { int x; char new_name[MAX_NAMELENGTH]; printf("Now enter a name in which you would like to search the list for\n"); scanf("%s",new_name); for(x = 0; x < Number_entrys; x++) { if ( strcmp( new_name, names[x] ) == 0 ) { return x; } } return -1; } Like I mentioned before I have tried a lot of different ways to try and fix this issue, but I cant seem to get them to work. Printing X like what I have above is just the last thing I tried, and therefor know that it doesn't work. Any suggestions on the simplest way to do this?

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  • Should we use temporary variables for the returned values of functions?

    - by totymedli
    I thought about this: Is there a performance difference in these two practices: Store the return value of a function in a temporary variable than give that variable as a parameter to another function. Put the function into the other function. Specification Assuming all classes and functions are written correctly. Case 1. ClassA a = function1(); ClassB b = function2(a); function3(b); Case 2. function3(function2(function1())); I know there aren't a big difference with only one run, but supposed that we could run this a lot of times in a loop, I created some tests. Test #include <iostream> #include <ctime> #include <math.h> using namespace std; int main() { clock_t start = clock(); clock_t ends = clock(); // Case 1. start = clock(); for (int i=0; i<10000000; i++) { double a = cos(1); double b = pow(a, 2); sqrt(b); } ends = clock(); cout << (double) (ends - start) / CLOCKS_PER_SEC << endl; // Case 2. start = clock(); for (int i=0; i<10000000; i++) sqrt(pow(cos(1),2)); ends = clock(); cout << (double) (ends - start) / CLOCKS_PER_SEC << endl; return 0; } Results Case 1 = 6.375 Case 2 = 0.031 Why is the first one is much slower, and if the second one is faster why dont we always write code that way? Anyway does the second pratice has a name? I also wondered what happens if I create the variables outside the for loop in the first case, but the result was the same. Why?

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  • How Iostream file is located in computer by c++ code during execution

    - by user3702024
    i want to know that in a c++ code during execution how iostream file is founded. we write #include in c++ program and i know about #include which is a preprocessor directive to load files and is a file name but i don't know that how that file is located. i have some questions in my mind... Is Standard library present in compiler which we are using? Is that file is present in standard library or in our computer? Can we give directory path to locate the file through c++ code if yes then how?

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  • installing widgets for qt

    - by Lakshan Perera
    I resently found a very useful set of widgets set for qt from http://www.wysota.eu.org/wwwidgets/ and I downloaded wwWidgets 1.0 installer for MinGW and simply installed it. now I can see those widgets in qt creator, and I can drag and drop them. but when compiling the project it says that those include files are not found. (ex: qwwled.h not found) but I see that file is in C:\Qt\4.8.3\include\wwWidgets please if someone can help me in this issue I would be very thankful. im using qt 4.8.3 with mingw 4.4

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  • Can't access variables from dynamically loaded javascript

    - by Menno
    I'm using a fairly simple system to load javascript dynamically: include = function (url) { var e = document.createElement("script"); e.src = url; e.type="text/javascript"; document.getElementsByTagName("head")[0].appendChild(e); }; Let's say I have a file test.js which has the following contents: var foo = 4; Now, in my original script, I want to use include(test.js); console.log(foo); However, I get a 'foo has not been defined' error on this. I'm guessing it has to do with the dynamic script being included as the last child of the <head> tag. How can I get this to work?

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