¡@
c++ Programming Glossary: somethingWhy 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 for this branch even under Ox . Intel Compiler 11 does something miraculous. It interchanges the two loops thereby hoisting the..
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 it must be defined exactly once. If you forget to define something that's been declared and referenced somewhere then the linker.. to and complains about a missing symbols. If you define something more than once then the linker doesn't know which of the definitions.. x a definition . In other words forward declaration is something of a misnomer since there are no other forms of class declarations..
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 your macro always means the same thing. Let's say you had something like your second macro. #define BAR X f x g x Now if you were.. variables. In the most general case the solution is to use something like do ... while to cause the macro to be a single statement.. 0 You don't have to use do ... while you could cook up something with if ... else as well although when if ... else expands inside..
Most effective way for float and double comparison http://stackoverflow.com/questions/17333/most-effective-way-for-float-and-double-comparison bool CompareDoubles1 double A double B return A B But something like bool CompareDoubles2 double A double B diff A B return..
What is the copy-and-swap idiom? http://stackoverflow.com/questions/3279543/what-is-the-copy-and-swap-idiom gone For a strong exception guarantee it would need to be something akin to dumb_array operator const dumb_array other if this other.. guideline is as follows if you're going to make a copy of something in a function let the compiler do it in the parameter list...
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 isn't necessary but it's important to note that the T something syntax is equivalent to T something and should be avoided more.. to note that the T something syntax is equivalent to T something and should be avoided more on that later . A T something something_else.. T something and should be avoided more on that later . A T something something_else is safe however and guaranteed to call the constructor...
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 is that they defy expectations. Sampling tells you something is a problem and your first reaction is disbelief. That is natural..
Undefined Behavior and Sequence Points http://stackoverflow.com/questions/4176328/undefined-behavior-and-sequence-points What are side effects Evaluation of an expression produces something and if in addition there is a change in the state of the execution..
http://stackoverflow.com/questions/4421706/operator-overloading able to do the same for user defined types which could be something as innocently looking as a list iterator . Once you got used..
http://stackoverflow.com/questions/4810664/how-do-i-use-arrays-in-c of pointers common pitfalls when using arrays If you feel something important is missing in this FAQ write an answer and link it..
Why is iostream::eof inside a loop condition considered wrong? http://stackoverflow.com/questions/5605125/why-is-iostreameof-inside-a-loop-condition-considered-wrong loop condition is almost certainly wrong . I generally use something like while cin n which I guess implicitly checks for EOF why..
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 you to break the rules of the system. If you try to do something illegal and foolish like going back into a room you're not authorized.. and get away with it. Most of the time. Until one day something truly awful goes wrong and the process explodes. This is problematic... to call attention to the fact that you are probably doing something dangerous that could be breaking the rules. For further reading..
Template specialization of particular members? http://stackoverflow.com/questions/1501357/template-specialization-of-particular-members to specialize particular members of a template class Something like template typename T bool B struct X void Specialized template..
Converting multidimensional arrays to pointers in c++ http://stackoverflow.com/questions/1584100/converting-multidimensional-arrays-to-pointers-in-c two alternative incompatible ways to implement a 2D array. Something needs to be changed either the function's interface or the structure..
How could pairing new[] with delete possibly lead to memory leak only? http://stackoverflow.com/questions/1913343/how-could-pairing-new-with-delete-possibly-lead-to-memory-leak-only of reserved memory with the size of the memory in bytes. Something like this size data ... ^ pointer returned by new and new Note..
pure virtual function with implementation http://stackoverflow.com/questions/2089083/pure-virtual-function-with-implementation A f in your example if A f were public or protected . Something like class B public A virtual void f class B doesn't have anything..
Is there any advantage of using map over unordered_map in case of trivial keys? http://stackoverflow.com/questions/2196995/is-there-any-advantage-of-using-map-over-unordered-map-in-case-of-trivial-keys give up that obviously you can't use an unordered_map . Something else to keep in mind is that unordered_map 's generally use..
Is there support in C++/STL for sorting objects by attribute? http://stackoverflow.com/questions/2202731/is-there-support-in-c-stl-for-sorting-objects-by-attribute class just because I want to sort based on an 'attribute'. Something like this maybe sort people.begin people.end cmpfn Person Person..
Fixed-size floating point types http://stackoverflow.com/questions/2524737/fixed-size-floating-point-types int32_t. Are there similar fixed size floating point types Something like float32_t c c boost floating point share improve this..
Is “for(;;)” faster than “while (TRUE)”? If not, why do people use it? http://stackoverflow.com/questions/2611246/is-for-faster-than-while-true-if-not-why-do-people-use-it &ldquo while TRUE &rdquo If not why do people use it for Something to be done repeatedly I have seen this sort of thing used a..
C++ - what does the colon after a constructor mean? [duplicate] http://stackoverflow.com/questions/2785612/c-what-does-the-colon-after-a-constructor-mean My question is what are the len le and demo 0 0 called Something to do with inheritance c share improve this question As..
http://stackoverflow.com/questions/2795023/c-template-typedef vector which is equivalent to a Matrix with sizes N and 1. Something like that typedef Matrix N 1 Vector N Which produces compile..
What are the differences between “generic” types in C++ and Java? http://stackoverflow.com/questions/36347/what-are-the-differences-between-generic-types-in-c-and-java methods on the objects passed something like T extends Something T sum T a T b return a.add b In C generic functions classes.. at runtime so at runtime Java is actually calling ... Something sum Something a Something b return a.add b So generic programming.. so at runtime Java is actually calling ... Something sum Something a Something b return a.add b So generic programming in Java..
Testing stream.good() or !stream.eof() reads last line twice [duplicate] http://stackoverflow.com/questions/4324441/testing-stream-good-or-stream-eof-reads-last-line-twice last line twice. Why does this happen and how do I fix it Something very similar happens with ifstream f x.txt string line while..
http://stackoverflow.com/questions/537303/binary-literals format here. Is there a way to do it directly in binary Something like this const int has_nukes 0b00000000000000000000000000000001..
Is local static variable initialization thread-safe in C++11? http://stackoverflow.com/questions/8102125/is-local-static-variable-initialization-thread-safe-in-c11 and hopefully have an answer reflecting the current state. Something like Logger g_logger static Logger lg return lg Is the constructor..
Elegant solution to duplicate, const and non-const, getters? [duplicate] http://stackoverflow.com/questions/856542/elegant-solution-to-duplicate-const-and-non-const-getters Don't you hate it when you have class Foobar public Something getSomething int index big non trivial chunk of code... return.. you hate it when you have class Foobar public Something getSomething int index big non trivial chunk of code... return something.. big non trivial chunk of code... return something const Something getSomething int index const big non trivial chunk of code.....
Which kind of pointer do I use when? http://stackoverflow.com/questions/8706192/which-kind-of-pointer-do-i-use-when pointers like T and the rest of the boost smart pointers. Something like this would be great . c pointers c 11 smart pointers c..
operator= and functions that are not inherited in C++? http://stackoverflow.com/questions/12009865/operator-and-functions-that-are-not-inherited-in-c Crtp class Base inline Crtp operator const Base Crtp rhs SOMETHING return static_cast Crtp this class Derived1 public Base Derived1..
Fastest way to check if a file exist using standard C++/C++11/C? http://stackoverflow.com/questions/12774207/fastest-way-to-check-if-a-file-exist-using-standard-c-c11-c to check if all of them exist . What to write instead of SOMETHING in the following function inline bool exist const std string.. following function inline bool exist const std string name SOMETHING c c file stream share improve this question Well I threw..
Python/C++ Binding Library comparison http://stackoverflow.com/questions/1492755/python-c-binding-library-comparison instructions Used by Google hey that's got to count for SOMETHING right Boost Python Support Python 2 and 3 Syntax can be awkward..
How do C++ progs get their return value, when a return is not specified in the function? http://stackoverflow.com/questions/3459810/how-do-c-progs-get-their-return-value-when-a-return-is-not-specified-in-the-f flag that I was later using for logic. But apparently SOMETHING was being returned and that something was always true if I left..
Different template syntax for finding if argument is a class or not http://stackoverflow.com/questions/6543652/different-template-syntax-for-finding-if-argument-is-a-class-or-not template with a value of false . Everytime you see a T SOMETHING if SOMETHING isn't present be it a type a data member or a simple.. with a value of false . Everytime you see a T SOMETHING if SOMETHING isn't present be it a type a data member or a simple pointer..
|