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c++ Programming Glossary: doesn'tWhy 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 the direction with a flag. But in computers the processor doesn't know which direction a branch will go until the last moment...
What is an undefined reference/unresolved external symbol error and how do I fix it? http://stackoverflow.com/questions/12573816/what-is-an-undefined-reference-unresolved-external-symbol-error-and-how-do-i-fix assumes that that symbol was defined somewhere but it doesn't yet care where. The linking phase is responsible for finding..
What is the difference between a definition and a declaration? http://stackoverflow.com/questions/1410563/what-is-the-difference-between-a-definition-and-a-declaration been declared and referenced somewhere then the linker doesn't know what to link references to and complains about a missing.. If you define something more than once then the linker doesn't know which of the definitions to link references to and complains..
Do-While and if-else statements in C/C++ macros http://stackoverflow.com/questions/154136/do-while-and-if-else-statements-in-c-c-macros as the else is no longer associated with the if. It doesn't help to wrap things in curly braces within the macro because.. correct. if corge f corge g corge else gralt This doesn't work if instead of f X you have a more complicated body of code..
Default constructor with empty brackets http://stackoverflow.com/questions/180172/default-constructor-with-empty-brackets interpreted as function declaration even if resulting AST doesn't compile. Another instance of the same problem std ifstream ifs..
Is it possible to write a C++ template to check for a function's existence? http://stackoverflow.com/questions/257288/is-it-possible-to-write-a-c-template-to-check-for-a-functions-existence class T has toString defined then it uses it otherwise it doesn't. The magical part that I don't know how to do is the FUNCTION_EXISTS..
What is the slicing problem in C++? http://stackoverflow.com/questions/274626/what-is-the-slicing-problem-in-c problem in C Someone mentioned it in the IRC but google doesn't have a good answer. c inheritance slicing c faq share improve..
Regular cast vs. static_cast vs. dynamic_cast http://stackoverflow.com/questions/28002/regular-cast-vs-static-cast-vs-dynamic-cast returns a null pointer if the object referred to doesn't contain the type casted to as a base class when you cast to.. code is not valid because Base is not polymorphic doesn't contain a virtual function struct Base struct Derived Base int..
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 but when casting downwards it can be used as long as it doesn't cast through virtual inheritance. It does not do checking however.. a reference. dynamic_cast has some limitations though. It doesn't work if there are multiple objects of the same type in the inheritance..
What can I use to profile C++ code in Linux? http://stackoverflow.com/questions/375913/what-can-i-use-to-profile-c-code-in-linux the probable cost of I . If the amount of data is small it doesn't tell us accurately what the cost is only that it is big enough.. that we see I more than once. If we only see it once that doesn't tell us much except that f 0. So even a very small 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 for both cases Just like in the case of aggregates it doesn't matter what static members the class has Examples struct POD..
Where and why do I have to put the “template” and “typename” keywords? http://stackoverflow.com/questions/610245/where-and-why-do-i-have-to-put-the-template-and-typename-keywords Tail template inUnion U dummy ... The keyword template doesn't always have to appear in the last part of a name. It can appear..
Do the parentheses after the type name make a difference with new? http://stackoverflow.com/questions/620137/do-the-parentheses-after-the-type-name-make-a-difference-with-new sometimes you absolutely cannot have them and sometimes it doesn't matter. C 11 Update C 11 introduced a uniform initialization..
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 a stack for storage of locals it could use the heap. It doesn't because that would make the program slower. An implementation.. to zero everything in the room that you just vacated. It doesn't because again that would be expensive. An implementation of..
Opengl linux undefined reference to basic functions http://stackoverflow.com/questions/10000925/opengl-linux-undefined-reference-to-basic-functions to run the program on a fresh install of Ubuntu 11.04. Doesn't work. So I installed sudo apt get install freeglut3 freeglut3..
Why is the C++ STL is so heavily based on templates? (and not on *interfaces*) http://stackoverflow.com/questions/1039853/why-is-the-c-stl-is-so-heavily-based-on-templates-and-not-on-interfaces as Java defines it but doesn't it achieve the goals of OOP Doesn't it achieve reusability low coupling modularity and encapsulation..
Define std::string in C++ without escape characters http://stackoverflow.com/questions/10501599/define-stdstring-in-c-without-escape-characters of std string st C program files myFile.txt something like Doesn't work correctly due to escape characters . std string st C program..
http://stackoverflow.com/questions/1380371/what-are-the-most-widely-used-c-vector-matrix-math-linear-algebra-libraries-a is very focused specifically on rendering and graphics. Doesn't include general purpose NxM matrices matrix decomposition and..
Delete all items from a c++ std::vector http://stackoverflow.com/questions/1525535/delete-all-items-from-a-c-stdvector vector.begin vector.end but it doesn't work help Update Doesn't clear destruct the elements held by the vector I don't want.. I think you should use std vector clear vec.clear EDIT Doesn't clear destruct the elements held by the vector Yes it does...
how to skip a file inside the tar file to get a particular file http://stackoverflow.com/questions/17920081/how-to-skip-a-file-inside-the-tar-file-to-get-a-particular-file logic c html parsing tar share improve this question Doesn't look too bad except for the errors you set skip ... instead..
std::vector is so much slower than plain arrays? http://stackoverflow.com/questions/3664272/stdvector-is-so-much-slower-than-plain-arrays completed in 26.591 seconds That's about 3 4 times slower Doesn't really justify for the vector may be slower for a few nanosecs..
C++ function to count all the words in a string http://stackoverflow.com/questions/3672234/c-function-to-count-all-the-words-in-a-string obvious to me. Given a string count all the words in it. Doesn't matter if they are repeated. Just the total count like in a..
http://stackoverflow.com/questions/5100718/int-to-hex-string-in-c ways to do it but they mostly seem targeted towards c. Doesn't seem there's a native way to do it in c . Pretty simple problem..
Should objects delete themselves in C++? http://stackoverflow.com/questions/522637/should-objects-delete-themselves-in-c object should be deleted when the object no longer exists Doesn't make sense. But if there is no clearly defined single owner..
Good tools for creating a C/C++ parser/analyzer http://stackoverflow.com/questions/526797/good-tools-for-creating-a-c-c-parser-analyzer at them in detail thoughts CScope Old school C analyzer. Doesn't seem to do a full parse though. Described as a glorified 'grep'..
Why do some people use swap for move assignments? http://stackoverflow.com/questions/6687388/why-do-some-people-use-swap-for-move-assignments Why not just assign the two __u members to this directly Doesn't the swap imply that __u is assigned the this members only to..
Does using references instead of pointers, resolve memory leaks in C++? http://stackoverflow.com/questions/6783939/does-using-references-instead-of-pointers-resolve-memory-leaks-in-c func1 ... Programmer forgot delete the var1 delete var1 or Doesn't know 'delete var1 ' is correct or 'delete var1 '. Some of memory..
Why dereferencing a null pointer is undefined behaviour? http://stackoverflow.com/questions/6793262/why-dereferencing-a-null-pointer-is-undefined-behaviour is the rationale behind this decision Compiler dependency Doesn't seem because according to C99 standard as far as I know it is..
Thread safe lazy construction of a singleton in C++ http://stackoverflow.com/questions/6915/thread-safe-lazy-construction-of-a-singleton-in-c the singleton it should still only be constructed once . Doesn't rely on static variables being constructed beforehand so the..
http://stackoverflow.com/questions/79023/c-gdb-gui can display the contents of complex nested C data types Doesn't get confused by and preferably can intelligently step through..
C++11: The range-based for statement: “range-init” lifetime? http://stackoverflow.com/questions/9657708/c11-the-range-based-for-statement-range-init-lifetime a collection eg vector string boo ie for auto bo boo ... Doesn't the line become auto r boo ... And so the temporary return value..
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