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c++ Programming Glossary: originalC++ convert hex string to signed integer http://stackoverflow.com/questions/1070497/c-convert-hex-string-to-signed-integer type std cout static_cast int x std endl NOTE Below is my original answer which as the edit says is not a complete answer. For..
Why is processing a sorted array faster than an unsorted array? http://stackoverflow.com/questions/11227809/why-is-processing-a-sorted-array-faster-than-an-unsorted-array Note that this hack is not strictly equivalent to the original if statement. But in this case it's valid for all the input..
What do the following phrases mean in C++: zero-, default- and value-initialization? http://stackoverflow.com/questions/1613341/what-do-the-following-phrases-mean-in-c-zero-default-and-value-initializat is new with the C 2003 standard it doesn't exist in the original 1998 standard I think it might be the only difference that's..
Why does an overridden function in the derived class hide other overloads of the base class? http://stackoverflow.com/questions/1628768/why-does-an-overridden-function-in-the-derived-class-hide-other-overloads-of-the this behavior an explicit action is required from the user originally a redeclaration of inherited method s currently deprecated.. of using declaration. As you correctly observed in your original post I'm referring to the Not polymorphic remark this behavior..
What is the name of this operator: “-->”? http://stackoverflow.com/questions/1642028/what-is-the-name-of-this-operator Your condition code is decrementing x while returning x s original not decremented value and then comparing the original value.. x s original not decremented value and then comparing the original value with 0 using the operator. To better understand the statement..
What is the difference between #include <filename> and #include “filename”? http://stackoverflow.com/questions/21593/what-is-the-difference-between-include-filename-and-include-filename contained sequence including characters if any from the original directive. A preprocessing directive of the form #include pp..
What uses are there for “placement new”? http://stackoverflow.com/questions/222557/what-uses-are-there-for-placement-new the memory buffer. Instead you should delete only the original buffer. You would have to then call the destructors directly..
http://stackoverflow.com/questions/3106110/what-is-move-semantics heap data we have just copied the pointer and then set the original pointer to null. In effect we have stolen the data that originally.. pointer to null. In effect we have stolen the data that originally belonged to the source string. Again the key insight is that..
When should static_cast, dynamic_cast and reinterpret_cast be used? http://stackoverflow.com/questions/332030/when-should-static-cast-dynamic-cast-and-reinterpret-cast-be-used modifying a formerly const value is only undefined if the original variable is const if you use it to take the const off a reference.. is that if you cast the result back to the original type you will get the exact same value. There are a number of..
What are Aggregates and PODs and how/why are they special? http://stackoverflow.com/questions/4178175/what-are-aggregates-and-pods-and-how-why-are-they-special contents back into your object the object will hold its original value. Do note that there is no such guarantee for objects of.. #define N sizeof T char buf N T obj obj initialized to its original value memcpy buf obj N between these two calls to memcpy obj.. this point each subobject of obj of scalar type holds its original value goto statement. As you may know it is illegal the compiler..
What's this STL vs. “C++ Standard Library” fight all about? [closed] http://stackoverflow.com/questions/5205491/whats-this-stl-vs-c-standard-library-fight-all-about features and significantly alters some classes. The original STL is now often called an implementation of the C Standard.. STL like libraries that are in fact implementations of the original STL not the C Standard Library. Until recently STLPort was one..
What are the differences between pointer variable and reference variable in C++? http://stackoverflow.com/questions/57483/what-are-the-differences-between-pointer-variable-and-reference-variable-in-c a reference shares the same memory address with the original variable but also takes up some space on the stack. Since a.. the stack. Since a reference has the same address as the original variable itself it is safe to think of a reference as another..
Can a local variable's memory be accessed outside its scope? http://stackoverflow.com/questions/6441218/can-a-local-variables-memory-be-accessed-outside-its-scope pass a pointer to the stack back out of your method as the original poster does here that's just a pointer to the middle of some..
What is the difference between char a[] = “string”; and char *p = “string”; http://stackoverflow.com/questions/9460260/what-is-the-difference-between-char-a-string-and-char-p-string a &ldquo string&rdquo and char p &ldquo string&rdquo The original title of the question was What is the difference between char..
Detection of rectangular bright area in a Image using OpenCv http://stackoverflow.com/questions/10581451/detection-of-rectangular-bright-area-in-a-image-using-opencv I want to detect the rectangular region at the center Original Image .But after I used the algorithm I got something like this..
Is this C++ structure initialization trick safe? http://stackoverflow.com/questions/112085/is-this-c-structure-initialization-trick-safe author to consider litb's answer as the right one. Original answer Putting a true object i.e. std string etc. inside will..
Why is my program slow when looping over exactly 8192 elements? http://stackoverflow.com/questions/12264970/why-is-my-program-slow-when-looping-over-exactly-8192-elements slow downs on large powers of two. Core i7 920 @ 3.5 GHz Original code 8191 1.499 seconds 8192 2.122 seconds 8193 1.582 seconds..
Very poor boost::lexical_cast performance http://stackoverflow.com/questions/1250795/very-poor-boostlexical-cast-performance which means that boost is still getting better and better Original answer Just to add info on Barry's and Motti's excellent answers..
Confused when boost::asio::io_service run method blocks/unblocks http://stackoverflow.com/questions/15568100/confused-when-boostasioio-service-run-method-blocks-unblocks could be written differently in the same manner as the Original Code where handlers are added to the io_service and then the..
How to determine a region of interest and then crop an image using OpenCV http://stackoverflow.com/questions/15693900/how-to-determine-a-region-of-interest-and-then-crop-an-image-using-opencv int argc char argv cv Mat img cv imread argv 1 std cout Original image size img.size std endl Convert RGB Mat to GRAY cv Mat.. i vertices i 1 4 cv Scalar 0 255 0 1 CV_AA cv imshow Original img cv waitKey 0 Set the ROI to the area defined by the box..
Removing leading and trailing spaces from a string http://stackoverflow.com/questions/1798112/removing-leading-and-trailing-spaces-from-a-string leading and trailing spaces from the below string object. Original string This is a sample string Desired string This is a sample.. extra spaces between words of the string. For example Original string This is a sample string Desired string This is a sample..
Help with understanding why UAC dialog pops up on Win7 for our application http://stackoverflow.com/questions/2192798/help-with-understanding-why-uac-dialog-pops-up-on-win7-for-our-application fields Vendor Company Name Product Name File Description Original Filename Internal Name and Export Name. Keywords in the side..
How to programmatically gain root privileges? http://stackoverflow.com/questions/2483755/how-to-programmatically-gain-root-privileges c root elevated privileges share improve this question Original answer You might consider the setuid switch on the executable..
Memory leak detection under Windows for GNU C/C++ http://stackoverflow.com/questions/283726/memory-leak-detection-under-windows-for-gnu-c-c underflows leaks double deletion and dangling references. Original link to c.snippets.org now invalid. share improve this answer..
Split an Integer into its digits c++ http://stackoverflow.com/questions/4207696/split-an-integer-into-its-digits-c int argc char argv int num getInput Enter a number cout Original Number num endl stack int digits int sum 0 while num 0 digits.push..
Is there a C pre-processor which eliminates #ifdef blocks based on values defined/undefined? http://stackoverflow.com/questions/525283/is-there-a-c-pre-processor-which-eliminates-ifdef-blocks-based-on-values-define #ifdef blocks based on values defined undefined Original Question What I'd like is not a standard C pre processor but..
How to create a UTF-8 string literal in Visual C++ 2008 http://stackoverflow.com/questions/688760/how-to-create-a-utf-8-string-literal-in-visual-c-2008 guarantee that it works as all text is out of the program. Original I'm answering this myself since only Evan appeared to understand..
sorting vector of vector of strings in C++ http://stackoverflow.com/questions/7114442/sorting-vector-of-vector-of-strings-in-c 0 compare_column_1 1 compare_column_2 2 cout Original n data_var endl sort data_var.begin data_var.end compare_column_2..
LD_PRELOAD only working for malloc, not free http://stackoverflow.com/questions/7811656/ld-preload-only-working-for-malloc-not-free void MallocFunc size_t size typedef void FreeFunc void Original functions static MallocFunc real_malloc NULL static FreeFunc..
Boost, Shared Memory and Vectors http://stackoverflow.com/questions/783623/boost-shared-memory-and-vectors named_mutex m_mutex EDIT Edited to use named_mutex. Original code was using interprocess_mutex which is incorrect but that..
C++11 Fun with initializer lists, arrays, and enumerations http://stackoverflow.com/questions/8606315/c11-fun-with-initializer-lists-arrays-and-enumerations eCOLORS First to eCOLORS Last using initializer lists. Original Code Since all information is known at compile time I think..
OpenCV C++/Obj-C: Detecting a sheet of paper / Square Detection http://stackoverflow.com/questions/8667818/opencv-c-obj-c-detecting-a-sheet-of-paper-square-detection reduction like that and further processing p Input Output Original image click Code double angle cv Point pt1 cv Point pt2 cv Point..
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