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  • Using Moq to Validate Separate Invocations with Distinct Arguments

    - by Thermite
    I'm trying to validate the values of arguments passed to subsequent mocked method invocations (of the same method), but cannot figure out a valid approach. A generic example follows: public class Foo { [Dependency] public Bar SomeBar { get; set; } public void SomeMethod() { this.SomeBar.SomeOtherMethod("baz"); this.SomeBar.SomeOtherMethod("bag"); } } public class Bar { public void SomeOtherMethod(string input) { } } public class MoqTest { [TestMethod] public void RunTest() { Mock<Bar> mock = new Mock<Bar>(); Foo f = new Foo(); mock.Setup(m => m.SomeOtherMethod(It.Is<string>("baz"))); mock.Setup(m => m.SomeOtherMethod(It.Is<string>("bag"))); // this of course overrides the first call f.SomeMethod(); mock.VerifyAll(); } } Using a Function in the Setup might be an option, but then it seems I'd be reduced to some sort of global variable to know which argument/iteration I'm verifying. Maybe I'm overlooking the obvious within the Moq framework?

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  • for loop vs std::for_each with lambda

    - by Andrey
    Let's consider a template function written in C++11 which iterates over a container. Please exclude from consideration the range loop syntax because it is not yet supported by the compiler I'm working with. template <typename Container> void DoSomething(const Container& i_container) { // Option #1 for (auto it = std::begin(i_container); it != std::end(i_container); ++it) { // do something with *it } // Option #2 std::for_each(std::begin(i_container), std::end(i_container), [] (typename Container::const_reference element) { // do something with element }); } What are pros/cons of for loop vs std::for_each in terms of: a) performance? (I don't expect any difference) b) readability and maintainability? Here I see many disadvantages of for_each. It wouldn't accept a c-style array while the loop would. The declaration of the lambda formal parameter is so verbose, not possible to use auto there. It is not possible to break out of for_each. In pre- C++11 days arguments against for were a need of specifying the type for the iterator (doesn't hold any more) and an easy possibility of mistyping the loop condition (I've never done such mistake in 10 years). As a conclusion, my thoughts about for_each contradict the common opinion. What am I missing here?

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  • jquery: i have to use parseInt() even when deal with numbers, why?

    - by Syom
    i have the following script <select id="select1"> <option value="1">1day</option> <option value="2">2day</option> <option value="3">3day</option> </select> <select id="select2"> <option value="1">1day</option> <option value="2">2day</option> <option value="3">3day</option> </select> and jquery $("#select2").change(function() { var max_value = parseInt($("#select2 :selected").val()); var min_value = parseInt($("#select1 :selected").val()); if(max_value < min_value) { $("#select1").val($(this).val()); } }); and now, what i can't understand anyway - if values of option elements are integer numbers, why i have to use parseInt()? in some cases it doesn't work without parseInt(). Thanks

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  • C# Possible to have a generic return type?

    - by JL
    Here is a typical function that returns either true/false; private static bool hasValue() { return true; } Now on an error, I would like to return my own custom error object with definition: public class Failure { public string failureDateTime { get; set; } public string failureReason { get; set; } } I would have expected to be able to throw this custom object for example... private static bool hasValue() { throw new Failure(); } This is not possible, and I don't want to derive Failure from System.IO.Exception because of the inability to serialize an exception in C#. What is the best practice / or ideal solution to this problem. Should I just work with private static object? Or is there a cleaner way to return a custom object or bypass the typical return type on an error (not using System.IO.Exception)? Not entirely wild about object either, because then I need to cast the result and validate it by more boolean logic.

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  • Projecting an object into a scene based on world coordinates only

    - by user354862
    I want to place a 3D image into a scene base on world/global coordinates. I have an image of a scene. The image was captures at some global coordinate (x1, y1, z1). I am given an object that needs to be placed into this scene based on its global coordinate (x2, y2, y3). This object needs to be projected into the scene accurately similarly to perspective projection. An example may help to make this clear. Imagine there is a parking lot with some set of global coordinates. A picture is taken of a portion of the parking lot. The coordinates from the spot where the image was taken is recorded. The goal is to place a virtual vehicle into this image using the global coordinates for that vehicle. Because the global cooridnates for the vehicle may not be in the fov of the global coordinates for the image I am assuming that I will need the image coordinates, angle and possibly fov. 3D graphics is not my area so I have been looking at http://en.wikipedia.org/wiki/Perspective_projection#Perspective_projection. I have also been looking at Matrix3DProjection which seems to possibly be what I am looking for but it only works in Silverlight and I am trying to do this in WPF. In my mind it appears I need to determine the (X,Y,Z) coordinates that are in the fov of the image, determine the world coordinate to pixel conversion and then accurately project the vehicle into the image giving it the correct perspective such that is looks 3D i.e smaller the further away bigger closer Is there a function within WPF that can help with this or will I need to re-learn matrices and do this by hand?

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  • difficulties in javascript coding [on hold]

    - by user3718986
    Question is, It takes me 3 hours to fly from NY to CA. How much it will take me if I fly directly from NY to Florida. suppose that distance from CA to Flordia is 8 hours by air..Rule is if you suppose to travel from NY to Florida you will have to pass through CA. I did the quesiton in JavaScript below but coding isn't correct. Can someone fixed this issue for me please? var destination = prompt('Please enter your destinations. We are currently flying to NY,CA and FL'); var locatioon = prompt("specify your current location. "); switch (destination) { case 'NY': { distanceTeller(locatioon); break; } break; case 'CA': { distanceTeller(locatioon); break; } break; case 'FL': { alert("11 HR"); } default: alert('dont look at me'); break; } function distanceTeller(locatioon) { if (locatioon == 'CA') { alert('it will take you 3 hours'); } else if (locatioon == 'FL') { alert('it will take you 8 hours'); } else alert('it will take you 11 hours to reach NY'); }

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  • Conditional fieldgroups/fieldsets in Drupal 7

    - by seane
    Background: In Drupal 7, I have created a form with CCK (aka the Field UI). I used the Field group module to create a fieldgroup, but I need it to be conditional, meaning it will only display depending on a previous answer. Previous research: To create a conditional field, you can use hook_form_alter() to edit the #states attribute like so: function MYMODULE_form_alter(&$form, &$form_state, $form_id) { if ($form_id == 'person_info_node_form') { // Display 'field_maiden_name' only if married $form['field_maiden_name']['#states'] = array( 'visible' => array( ':input[name="field_married[und]"]' => array('value' => 'Yes'), ), ); } } However, there seems to be no way to use the States API for fieldgroups. One thing to note is that, while fields are stored in $form, fieldgroups are stored in $form['#groups'] as well as in $form['#fieldgroups']. I don't know how to distinguish between these, and with this in mind, I have tried to apply a #states attribute to a fieldgroup in the same manner as above. However, it only produces server errors. Question: Is there a way to make a fieldgroup display conditionally using the States API or some alternative approach?

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  • Set attribute disabled to options NOT containing a certain string

    - by kuswantin
    I know this should be easier if I could only use optgroups. But I am trying to avoid hacking core of my CMS, so jQuery should come to rescue again, hopefully. I have a select with options in a hierarchy sometimes, and I want to put attributes disabled to any of options containing text NOT starting with a dash. I want to code like: Set disabled attributes to selectors with options text NOT starting with a dash ("-"). <select id="options"> <option value="" selected="selected">- Please choose -</option> <option value="1">Parent1</option> <option value="2">-child1</option> <option value="3">-child2</option> <option value="4">-child3</option> <option value="5">-child4</option> <option value="6">Parent2</option> <option value="7">-child5</option> <option value="8">-child6</option> <option value="9">-child7</option> <option value="10">-child8</option> </select> The closest solution is here http://stackoverflow.com/questions/2012299/contain-start-by, $.extend($.expr[':'], { startsWith: function(elem,match) { return (elem.textContent || elem.innerText || "").indexOf(match[3]) == 0; } }); But I can't seem to do it right this far. Any help would be very much appreciated. Thank you very much.

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  • C++ Template Classes and Copy Construction

    - by themoondothshine
    Is there any way I can construct an new object from the given object if the template parameters of both objects are identical at run-time? For example: I have a template class with the declaration: template<typename _Type1, typename _Type2> class Object; Next, I have two instantiations of the template: template class Object<char, int>; template class Object<wchar_t, wint_t>; Now, I want to write a member function such as: template<typename _Type1, typename _Type2> Object<char, int> Object<_Type1, _Type2>::toCharObject() { if(__gnu_cxx::__are_same<_Type1, char>::__value) return *this; else { //Perform some kind of conversion and return an Object<char, int> } } I have tried a couple of techniques, such as using __gnu_cxx::__enable_if<__gnu_cxx::__are_same<_Type1, char>::__value, _Type1>::__type in a copy constructor for the Oject class, but I keep running into the error: error: conversion from ‘Object<wchar_t, wint_t>’ to non-scalar type ‘Object<char, int>’ requested Is there no way I can do this? Any help will be greatly appreciated!

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  • JQuery Cross-slide

    - by Foxticity
    I'm trying to cycle through 3 images with JQuery Cross-slide, but the images doesn't want to display, here is the basic code below. All 3 images are in 650 - 100 size, and they are in the correct location, but the images just don't want to display. What am i doing wrong?? <html> <body> <script src="jquery.js" type="text/javascript"></script> <script src="jquery.cross-slide.js" type="text/javascript"></script> <div id="crossslide" style="width:650px; height:100px;"></div> <script type="text/javascript"> //<!-- $(function(){ $("#crossslide").crossSlide({ speed: 45, fade: 1 }, [ { src: "01.jpg", dir:"up"}, { src: "02.jpg", dir:"down"}, { src: "03.jpg", dir:"left"} ]); }); // --> </script> </body> </html>

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  • How to write a cgi script in perl that accepts output (an image file) from a urlconnection in a Java applet and writes it to the server?

    - by Brad Rock
    I created a Java applet for my web page that creates an image file. I want users to be able to run the applet and create unique images, click a button, and have the image they created be saved to the web server. I think I have the code down for writing the image to a URLconnection in the Java applet itself after having successfully written a file while running the applet on my system rather than the web page and saving a file to the local disk, and then altering a few things to write to a URLConnection instead of to the local disk (although we shall see how that works too). I am now trying to write a cgi script in perl that takes the image output from the URLConnection and writes the image to a file on my web server (note: I am a newbie to perl). I have found many examples of how to do something similar with simple text coming from an applet and then writing it to a text file, but I want to know how to apply the same concept to an image. Particularly, how do I read in the image? I've seen text input get read by using read(STDIN, $some_variable)--does the same thing work with an image? Likewise, how do I write the image file? What function do I use? Thanks for your help. I know that I am rather naive about all of this.

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  • multiple mysql_real_query() in while loop

    - by Steve
    It seems that when I have one mysql_real_query() function in a continuous while loop, the query will get executed OK. However, if multiple mysql_real_query() are inside the while loop, one right after the other. Depending on the query, sometimes neither the first query nor second query will execute properly. This seems like a threading issue to me. I'm wondering if the mysql c api has a way of dealing with this? Does anyone know how to deal with this? mysql_free_result() doesn't work since I am not even storing the results. //keep polling as long as stop character '-' is not read while(szRxChar != '-') { // Check if a read is outstanding if (HasOverlappedIoCompleted(&ovRead)) { // Issue a serial port read if (!ReadFile(hSerial,&szRxChar,1, &dwBytesRead,&ovRead)) { DWORD dwErr = GetLastError(); if (dwErr!=ERROR_IO_PENDING) return dwErr; } } // Wait 5 seconds for serial input if (!(HasOverlappedIoCompleted(&ovRead))) { WaitForSingleObject(hReadEvent,RESET_TIME); } // Check if serial input has arrived if (GetOverlappedResult(hSerial,&ovRead, &dwBytesRead,FALSE)) { // Wait for the write GetOverlappedResult(hSerial,&ovWrite, &dwBytesWritten,TRUE); //load tagBuffer with byte stream tagBuffer[i] = szRxChar; i++; tagBuffer[i] = 0; //char arrays are \0 terminated //run query with tagBuffer if( strlen(tagBuffer)==PACKET_LENGTH ) { sprintf(query,"insert into scan (rfidnum) values ('"); strcat(query, tagBuffer); strcat(query, "')"); mysql_real_query(&mysql,query,(unsigned int)strlen(query)); i=0; } mysql_real_query(&mysql,"insert into scan (rfidnum) values ('2nd query')",(unsigned int)strlen("insert into scan (rfid) values ('2nd query')")); mysql_free_result(res); } }

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  • How do you get and set a class property across multiple functions in Objective-C?

    - by editor
    Following up on this question about sharing objects between classes, I now need to figure out how to share the objects across various functions in a class. First, the setup: In my App Delegate I load menu information from JSON into a NSMutableDictionary and message that through to a view controller using a function called initWithData. I need to use this dictionary to populate a new Table View, which has methods like numberOfRowsInSection and cellForRowAtIndexPath. I'd like to use the dictionary count to return numberOfRowsInSection and info in the dictionary to populate each cell. Unfortunately, my code never gets beyond the init stage and the dictionary is empty so numberOfRowsInSection always returns zero. I thought I could create a class property, synthesize it and then set it. But it doesn't seem to want to retain the property's value. What am I doing wrong here? In the header .h: @interface FirstViewController:UIViewController <UITableViewDataSource, UITableViewDelegate, UITabBarControllerDelegate> { NSMutableDictionary *sectorDictionary; NSInteger sectorCount; } @property (nonatomic, retain) NSMutableDictionary *sectorDictionary; - (id)initWithData:(NSMutableDictionary*)data; @end in the implementation .m: - (id) testFunction:(NSMutableDictionary*)dictionary { NSLog(@"Count #1: %d", [dictionary count]); return nil; } - (id)initWithData:(NSMutableDictionary *)data { if (!(self=[super init])) { return nil; } [self testFunction:data]; // this is where I'd like to set a retained property self.sectorDictionary = data; return nil; } - (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section { NSLog(@"Count #2: %d", [self.sectorDictionary count]); return [self.sectorDictionary count]; } Output from NSLog: 2010-05-04 23:00:06.255 JSONApp[15890:207] Count #1: 9 2010-05-04 23:00:06.259 JSONApp[15890:207] Count #2: 0

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  • JQuery validation using is() and multiple CSS classes

    - by Alex
    Hi Folks, Trying to debug something that basically .trim()'s, .val()'s and .length's a textarea input as HTML below (truncated): <form id="Kontaktanfrage" method="post" action="tests/testform/"> ... <textarea cols="50" rows="8" id="el_12" name="FORM[Kontaktanfrage][el_12]" title="Ihre Nachricht: *" class="textarea required"></textarea> ... </form> JavaScript: function validateField(formId, fieldId) { if (fieldId) { var element = "form#"+formId+" input#"+fieldId; var fieldValue = jQuery.trim(jQuery(element).val()); var fieldLength = fieldValue.length; var fieldError = ""; if ($(element).is('.textarea.required') && fieldLength == 0) { fieldError = "error message"; } } } The above if check is never true. Using JQuery: 1.4.1. Having seen other examples online, I can't see what the difference should be. Feel free to test it in FireBug at (http://www.initiat.de/tests/testform/). Any help appreciated, can't see what I'm doing wrong.

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  • load different images for each item on the listbox

    - by user161179
    Javascript: function changeMap() { imagesource = "http://maps.google.com/maps/api/staticmap?size=500x500&maptype=hybrid&zoom=16&sensor=false&markers=color:blue|label:K|28.541250,77.204100" ; mapimage.src = imagesource ; } Html code : <select name="choose_colony" id="choose_colony" size="8" onchange="changeMap()" style="float: left;"> <option value="1" >Big apartments</option> . . <option value="999">plaza</option> </select> <img name="mapimage" src="" alt="Select your Colony" style="float: right;"> In this whenever a selection on the listbox is made changeMap is called and an image is loaded. What I want is for a different image to be loaded everytime depending upon the option selected . there will be over 2000 entries in the listbox. Considering this what is the best way of going about this ? I can figure out the if/then part , but my main question is whether its ok to put all the 2000 long image addresses in the html file itself ? I hope I was clear ..

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  • Why doesn't my processor have built-in BigInt support?

    - by ol
    As far as I understood it, BigInts are usually implemented in most programming languages as strings containing numbers, where, eg.: when adding two of them, each digit is added one after another like we know it from school, e.g.: 246 816 * * ---- 1062 Where * marks that there was an overflow. I learned it this way at school and all BigInt adding functions I've implemented work similar to the example above. So we all know that our processors can only natively manage ints from 0 to 2^32 / 2^64. That means that most scripting languages in order to be high-level and offer arithmetics with big integers, have to implement/use BigInt libraries that work with integers as strings like above. But of course this means that they'll be far slower than the processor. So what I've asked myself is: Why doesn't my processor have a built-in BigInt function? It would work like any other BigInt library, only (a lot) faster and at a lower level: Processor fetches one digit from the cache/RAM, adds it, and writes the result back again. Seems like a fine idea to me, so why isn't there something like that?

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  • How to limit EditText lines to 1 by coding (ignoring enter)?

    - by Vahe Musinyan
    I am trying to ignore the enter key, but i do not want to use onKeyDown() function. There is a way to do this in xml: 1. android:maxLines = "1" 2. android:lines = "1" 3. android:singleLine = "true" I actually want to do the last one by coding. Does anyone know how to do that? for (int i=0; i<numClass; i++) { temp_ll = new LinearLayout(this); temp_ll.setOrientation(LinearLayout.HORIZONTAL); temp1 = new EditText(this); InputFilter[] FilterArray = new InputFilter[1]; FilterArray[0] = new InputFilter.LengthFilter(12); temp1.setFilters(FilterArray); // set edit text length to max 12 temp1.setHint(" class name "); temp1.setSingleLine(true); temp_ll.addView(temp1); frame.addView(temp_ll); } ll.addView(frame);

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  • How to detect if a RGB is fully transparent?

    - by omega
    In java, I want to make a fully transparent RGBA, and I do that by using public static int getTransparentRGB() { int r = 0; int g = 0; int b = 0; int a = 0; int new_pixel = (a << 24) | (r << 16) | (g << 8) | b; return new_pixel; } Color color = new Color(getTransparentRGB()); System.out.println(color.getAlpha()); // -> 255 ?! I purposely keep all rgba values 0. However after I create the Color object with the rgba value as the constructor, if I call .getAlpha(), I get 255 even though I made the rgb value with a 0 alpha. If it returns 255, how could I tell the difference between a Color object that wasn't transparent, because that would also have a 255 alpha. I expect the color object to return a 0 alpha based on the function above. Does anyone know whats going on? Thanks

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  • compile error:c language in telnet(linux)

    - by lilyrose07
    #include<stdio.h> #include<unistd.h> #include<stdlib.h> #include<pthread.h> int count=0; void *thread_function(void *arg) { while(count<10) { if(count%2==1) { count++; } else {sleep(1);} } } int main(int argc,int *argv) { int res; pthread_t a_thread[2]; void *thread_result; int n; while(count<10) { if(count%2==0) {printf("%d",count); count++; } else{sleep(1);} } for(n=0;n<2;n++) { pthread_create(&(a_thread[n]),NULL,thread_function,NULL); } while(count==9) {pthread_join(a_thread[0],&thread_result); } while(count==10) { pthread_join(a_thread[1],&thread_result); } printf("%d",count); return 0; } in telnet,linux i write gcc za.c error list: undefined reference to pthread_create,pthread_join in function 'main' //why??

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  • Why my tracking service freezes when the phone moves?

    - by user2878181
    I have developed a service which includes timer task and runs after every 5 minutes for keeping tracking record of the device, every five minutes it adds a record to the database. My service is working fine when the phone is not moving i.e it gives records after every 5 minutes as it should be. But i have noticed that when the phone is on move it updates the points after 10 or 20 minutes , i.e whenever the user stops in his way whenever he is on the move. Do service freezes on the move, if yes! how is whatsapp messenger managing it?? Please help! i am writing my onstart method. please help @Override public void onStart(Intent intent, int startId) { Toast.makeText(this, "My Service Started", Toast.LENGTH_LONG).show(); Log.d(TAG, "onStart"); mLocationClient.connect(); final Handler handler_service = new Handler(); timer_service = new Timer(); TimerTask thread_service = new TimerTask() { @Override public void run() { handler_service.post(new Runnable() { @Override public void run() { try { some function of tracking } }); } }; timer_service.schedule(thread_service, 1000, service_timing); //sync thread final Handler handler_sync = new Handler(); timer_sync = new Timer(); TimerTask thread_sync = new TimerTask() { @Override public void run() { handler_sync.post(new Runnable() { @Override public void run() { try { //connecting to the central server for updation Connect(); } catch (Exception e) { // TODO Auto-generated catch block } } }); } }; timer_sync.schedule(thread_sync,2000, sync_timing); }

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  • How to set the delay between update queries in Mysql so that every query get executed succesfully?

    - by OM The Eternity
    Hi All I have to the Update query mulitple times for different parameters using for loop in my PHP Script, now the problem Is Whenever I do it, only my last query get executed, all the previous queries seems to be skipped. the loop goes like this: foreach($cntrlflagset as $cntrlordoc => $cntrlorflag){ for($t=0;$t<count($cntrlorflag);$t++){ $userlvl = "controller"; $docflag = 1; $postfix = "created"; $createdoc->updatedocseeflags($cntrlorflag[$t],$docflag,$cntrlordoc,$postfix,$userlvl); $docflag = 2; $postfix = "midlvl"; $createdoc->updatedocseeflags($cntrlorflag[$t],$docflag,$cntrlordoc,$postfix,$userlvl); } } Here, the called function $createdoc-updatedocseeflags($cntrlorflag[$t],$docflag,$cntrlordoc,$postfix,$userlvl); Contains the Update query: $query = "UPDATE tbl_docuserstatus SET"; //if($flag != ""){ $query .= " docseeflag_".$postfix." = '".$flag."'"; //} $query .= " WHERE doc_id = '".$doc_id."' AND user_id = '".$user_id."'"; if($userlvl == "midlvl"){ $query .= " AND doc_midlvluser = '1'"; }elseif($userlvl == "finallvl"){ $query .= " AND doc_finallvluser = '1'"; }elseif($userlvl == "creator"){ $query .= " AND doc_creator = '1'"; }elseif($userlvl == "controller"){ $query .= " AND doc_controller = '1'"; }elseif($docarchive == 1){ $query .= " AND doc_controller = '1'"; } So could some one tell me, How to set the delay between update queries in Mysql so that every query get executed succesfully? Thanks In Advance

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  • Null pointer to struct which has zero size (empty)... It is a good practice?

    - by ProgramWriter
    Hi2All.. I have some null struct, for example: struct null_type { NullType& someNonVirtualMethod() { return *this; } }; And in some function i need to pass reference to this type. Reason: template <typename T1 = null_type, typename T2 = null_type, ... > class LooksLikeATupleButItsNotATuple { public: LooksLikeATupleButItsNotATuple(T1& ref1 = defParamHere, T2& ref2 = andHere..) : _ref1(ref1), _ref2(ref2), ... { } void someCompositeFunctionHere() { _ref1.someNonVirtualMethod(); _ref2.someNonVirtualMethod(); ... } private: T1& _ref1; T2& _ref2; ...; }; It is a good practice to use null reference as a default parameter?: *static_cast<NullType*>(0) It works on MSVC, but i have some doubts...

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  • linked list printing using while loop and combining like terms

    - by C Z
    i have a problem printing out my linked list. My program asks the user to enter many different coefficients and degrees and makes it a polynomial and using mergesort it sorts it and then prints it, now i want to combine like terms and i have a problem doing so. thats part of my function that i don't know what is wrong with it: Term* p; p=poly; if (p==0) cout<<"---empty list---"; while(p !=0) if (p->coef==(p->next)->coef){ cout<<(p->deg)+((p->next)->deg)<<"x^"<<(p->coef)<<endl; p=p->next;} if (p->coef !=(p->next)->coef){ cout<<p->deg<<"x"<<p->coef<<"+"; p=p->next;} cout<<endl; } and thats my struct: struct Term { int deg; float coef; Term *next; }; typedef Term* Poly;

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  • huge C file debugging problem

    - by valdo
    Hello all. I have a source file in my project, which has more than 65,536 code lines (112,444 to be exact). I'm using an "sqlite amalgamation", which comes in a single huge source file. I'm using MSVC 2005. The problems arrives during debugging. Everything compiles and links ok. But then when I'm trying to step into a function with the debugger - it shows an incorrect code line. What's interesting is that the difference between the correct line number and the one the debugger shows is exactly 65536. This makes me suspect (almost be sure in) some unsigned short overflow. I also suspect that it's not a bug in the MSVC itself. Perhaps it's the limitation of the debug information format. That is, the debug information format used by MSVC stores the line numbers as 2-byte shorts. Is there anything can be done about this (apart from cutting the huge file into several smaller ones) ?

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  • Struct containing a Map in a Map? (C++/STL)

    - by karok
    I was wondering if it was possible to create a struct containing a number of variables and a map in a map. What I have at the moment: typedef std::map<std::string,double> lawVariables; struct ObjectCustomData { std::string objectType; bool global_lock; std::map<std::string, lawVariables> lawData; }; This struct is then passed on to another function as a single data block for that object. The structure setup is as follows: Each object has a data block that contains: its ObjectType, a bool for a lock, and a varying number of "laws" that could look like this: law1 -> var_a = 39.3; -> var_g = 8.1; law8 -> var_r = 83.1; -> var_y = 913.3; -> var_a = 9.81; Firstly, I'm unsure whether I should be using a Map within a Map and secondly even if this would be valid, I'm unsure how to fill it with data and how to recall it afterwards. I looked at maps because then I can search (on a name) if a certain object has a certain law, and if that law has certain variables. (sorry for the first messy post appearance, hope this is better :) )

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