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c++ Programming Glossary: that'sIs gcc4.7 buggy about regular expressions? [duplicate] http://stackoverflow.com/questions/12530406/is-gcc4-7-buggy-about-regular-expressions you seriously and rush to deal with your complaints. IMO that's the problem with freely distributed software. No one is held..
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 be defined exactly once. If you forget to define something that's been declared and referenced somewhere then the linker doesn't..
How come a non-const reference cannot bind to a temporary object? http://stackoverflow.com/questions/1565600/how-come-a-non-const-reference-cannot-bind-to-a-temporary-object direct modification through calling non const method. But that's an exception you are generally not allowed to modify temporaries...
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 1998 standard I think it might be the only difference that's more than a clarification . See Kirill V. Lyadvinsky's answer..
Get the IP address of the machine http://stackoverflow.com/questions/212528/get-the-ip-address-of-the-machine it. Obviously I can also bind to INADDR_ANY and actually that's what I do at the moment . I would prefer to detect the public..
What uses are there for “placement new”? http://stackoverflow.com/questions/222557/what-uses-are-there-for-placement-new Placement new allows you to construct an object on memory that's already allocated. You may want to do this for optimizations..
Read whole ASCII file into C++ std::string http://stackoverflow.com/questions/2602013/read-whole-ascii-file-into-c-stdstring the t.open file.txt r syntax from. As far as I know that's not a method that std ifstream has. It looks like you've confused..
http://stackoverflow.com/questions/2979209/using-fflushstdin numerous websites warning against using it. And yet that's exactly how my CS professor taught the class to do it. How bad..
http://stackoverflow.com/questions/3106110/what-is-move-semantics string that std swap data that.data return this Huh that's it Where's the rvalue reference you might ask. We don't need..
What is the copy-and-swap idiom? http://stackoverflow.com/questions/3279543/what-is-the-copy-and-swap-idiom all the code we've already written elsewhere and that's a terrible thing. In our case the core of it is only two lines.. dumb_array other 1 swap this other 2 return this And that's it With one fell swoop all three problems are elegantly tackled.. without setting it to null we attempt to delete memory that's already been deleted We avoid this by setting it to null as..
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 const_cast also works similarly on volatile though that's less common. dynamic_cast is almost exclusively used for handling..
Finding C++ static initialization order problems http://stackoverflow.com/questions/335369/finding-c-static-initialization-order-problems how to SOLVE the static initialization order problem but that's not really my question. I'd like to know how to FIND objects..
When and why will an OS initialise memory to 0xCD, 0xDD, etc. on malloc/free/new/delete? http://stackoverflow.com/questions/370195/when-and-why-will-an-os-initialise-memory-to-0xcd-0xdd-etc-on-malloc-free-new in VS 2008 VC 9 the value was changed to 0xFE . I assume that's because there could be situations where the fill operation would..
Pass by Reference / Value in C++ http://stackoverflow.com/questions/410593/pass-by-reference-value-in-c if and only if the corresponding parameter of the function that's called has reference type and the reference parameter binds..
C/C++: Capture characters from standard input without waiting for enter to be pressed http://stackoverflow.com/questions/421860/c-c-capture-characters-from-standard-input-without-waiting-for-enter-to-be-pr that you can use to switch off line buffering i believe that's called raw mode as opposed to cooked mode look into man stty..
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 of a name. It can appear in the middle before a class name that's used as a scope like in the following example typename t template..
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 back out of your method as the original poster does here that's just a pointer to the middle of some entirely valid million..
What is “rvalue reference for *this”? http://stackoverflow.com/questions/8610571/what-is-rvalue-reference-for-this member and non member functions Operator overloading that's why. Consider this struct foo foo operator void implementation..
Detecting endianness programmatically in a C++ program http://stackoverflow.com/questions/1001307/detecting-endianness-programmatically-in-a-c-program type punning it will often be warned against by compiler. That's exactly what unions are for int is_big_endian void union uint32_t..
Is gcc4.7 buggy about regular expressions? [duplicate] http://stackoverflow.com/questions/12530406/is-gcc4-7-buggy-about-regular-expressions with the intention that it would be finished eventually. That's often how open source works Release early release often unfortunately..
Why aren't my include guards preventing recursive inclusion and multiple symbol definitions? http://stackoverflow.com/questions/14909997/why-arent-my-include-guards-preventing-recursive-inclusion-and-multiple-symbol will certainly complain here about f being redefined. That's obvious its definition is being included twice However the above.. when header.h contains the proper include guards . That's expected. Still even when the include guards are present and..
Benefits of Initialization lists http://stackoverflow.com/questions/1598967/benefits-of-initialization-lists Then that temporary object is destructed at the . That's inefficient. Question Is there any efficiency gain in the following..
http://stackoverflow.com/questions/162941/why-use-pointers no way of passing a variable by reference to a function. That's where you have to use pointers. Also you can have them to point..
What is the name of this operator: “-->”? http://stackoverflow.com/questions/1642028/what-is-the-name-of-this-operator standards compliance share improve this question That's not an operator . That's two separate operators and . Your condition.. share improve this question That's not an operator . That's two separate operators and . Your condition code is decrementing..
What is the copy-and-swap idiom? http://stackoverflow.com/questions/3279543/what-is-the-copy-and-swap-idiom non trivial try catch clauses this is a non issue. That's because a class should manage one resource only A successful..
http://stackoverflow.com/questions/3582001/advantages-of-using-forward x deduce 1 okay foo operates on x which has a value of 1 That's no good. E needs to get the same kind of value category that..
std::vector is so much slower than plain arrays? http://stackoverflow.com/questions/3664272/stdvector-is-so-much-slower-than-plain-arrays 14.669 seconds The whole thing completed in 26.591 seconds That's about 3 4 times slower Doesn't really justify for the vector..
C/C++: Capture characters from standard input without waiting for enter to be pressed http://stackoverflow.com/questions/421860/c-c-capture-characters-from-standard-input-without-waiting-for-enter-to-be-pr screen. c c inputstream share improve this question That's not possible portably in pure C because it depends too much..
What does T&& (double ampersand) mean in C++11? http://stackoverflow.com/questions/5481539/what-does-t-double-ampersand-mean-in-c11 parameter would multiply the necessary overload set by 2. That's very quickly unmaintainable. rvalue references fix this problem..
http://stackoverflow.com/questions/5854581/polymorphism-in-c down to 6 we only need change to typedef double Amount . That's nice but it wouldn't have been too much work to make the code..
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 boost int function 0 int main int f 0 boost function int f That's actually a valid expression It compares boost function with..
Accessing class members on a NULL pointer http://stackoverflow.com/questions/669742/accessing-class-members-on-a-null-pointer to know which object the function is being called on. That's because the object itself is what tells which function should.. is what tells which function should really be called. That's frequently implemented by giving the object a pointer to a vtable..
What is “rvalue reference for *this”? http://stackoverflow.com/questions/8610571/what-is-rvalue-reference-for-this free function don't you char const s free foo n foo f f s That's why member and non member functions are included in the so called..
What XML parser should I use in C++? http://stackoverflow.com/questions/9387610/what-xml-parser-should-i-use-in-c SAX to the extent that C allows. You have chosen Xerces That's your choice. It's pretty much the only C XML parser writer that.. values for things. You can search for attributes by name. That's about it. There are no convenience functions to turn attributes..
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