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c++ Programming Glossary: twoWhy 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 Compiler 11 does something miraculous. It interchanges the two loops thereby hoisting the unpredictable branch to the outer..
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 f int double extern double f int double the same as the two above extern double f int double However it must be defined..
Why is “using namespace std;” considered bad practice? http://stackoverflow.com/questions/1452721/why-is-using-namespace-std-considered-bad-practice to performance at all. But consider this You are using two libraries called Foo and Bar using namespace foo using namespace..
What is the slicing problem in C++? http://stackoverflow.com/questions/274626/what-is-the-slicing-problem-in-c foo class B public A int bar So an object of type B has two data members foo and bar Then if you were to write this B b..
What is the copy-and-swap idiom? http://stackoverflow.com/questions/3279543/what-is-the-copy-and-swap-idiom and elegantly assists the assignment operator in achieving two things avoiding code duplication and providing a strong exception.. A swap function is a non throwing function that swaps two objects of a class member for member. We might be tempted to.. . The first is the self assignment test. This check serves two purposes it's an easy way to prevent us from running needless..
http://stackoverflow.com/questions/4172722/what-is-the-rule-of-three it mean to copy a person object The main function shows two distinct copying scenarios. The initialization person b a is..
Undefined Behavior and Sequence Points http://stackoverflow.com/questions/4176328/undefined-behavior-and-sequence-points What does it mean Informally it means that between two sequence points a variable must not be modified more than once... and assignment to `i` `i` gets modified more than once b w two SP But the following expressions are fine i i i 1 1 well defined..
http://stackoverflow.com/questions/4421706/operator-overloading types as non member functions. The canonical forms of the two are these std ostream operator std ostream os const T obj write.. lhs rhs The important thing to note here is that only two of these operators actually do anything the others are just.. are just forwarding their arguments to either of these two to do the actual work. The syntax for overloading the remaining..
http://stackoverflow.com/questions/4810664/how-do-i-use-arrays-in-c each element of type int . Accessing elements C provides two syntactic variations to access individual elements of an array...
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 just a plain sequence of characters digits while the next two are the operator and operator type form. The last form is template.. an expression the following misses an operator between the two names or a semicolon separating them. t x f The syntax allows..
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 ways of generating code to manage memory but over time two basic techniques have become entrenched. The first is to have..
How to get the application executable name in Windows (C++ Win32 or C++/CLI)? http://stackoverflow.com/questions/124886/how-to-get-the-application-executable-name-in-windows-c-win32-or-c-cli is written in a mixture of native and .Net C code. Two ways that I have looked at are to parse the GetCommandLine function..
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 recursive inclusion and multiple symbol definitions Two common questions about include guards FIRST QUESTION Why aren't..
http://stackoverflow.com/questions/201718/concatenating-two-stl-vectors Two STL Vectors How do I concatenate two STL Vectors c stl vector..
In C++, is it safe/portable to use static member function pointer for C API callbacks? http://stackoverflow.com/questions/2068022/in-c-is-it-safe-portable-to-use-static-member-function-pointer-for-c-api-call 7.5 . 3.5 11 And 7.5 Linkage specifications ... Two function types with different language linkages are distinct..
Purpose of Unions in C and C++ http://stackoverflow.com/questions/2310483/purpose-of-unions-in-c-and-c sequence of any of standard layout struct members. §9.2 19 Two standard layout structs share a common initial sequence if corresponding..
How can I iterate over an enum? http://stackoverflow.com/questions/261963/how-can-i-iterate-over-an-enum this question The typical way is as follows enum Foo One Two Three Last for int fooInt One fooInt Last fooInt Foo foo static_cast.. down if the enum values are specified enum Foo One 1 Two 9 Three 4 Last This illustrates that an enum is not really meant.. in a switch statement. switch foo case One .. break case Two intentional fall through case Three .. break case Four .. break..
How does dereferencing of a function pointer happen? http://stackoverflow.com/questions/2795575/how-does-dereferencing-of-a-function-pointer-happen a pointer. And you can do this as many times as you like. Two similar experiments you can try What happens if you dereference..
Unmangling the result of std::type_info::name http://stackoverflow.com/questions/281818/unmangling-the-result-of-stdtype-infoname from GManNickG I have cleaned up the code a little bit. Two versions are given one with C 11 features and another one with..
What are rvalues, lvalues, xvalues, glvalues, and prvalues? http://stackoverflow.com/questions/3601602/what-are-rvalues-lvalues-xvalues-glvalues-and-prvalues expression can be an rvalue lvalue xvalue glvalue prvalue Two categories have become five categories. What are these new categories..
Unsequenced value computations (a.k.a sequence points) http://stackoverflow.com/questions/3852768/unsequenced-value-computations-a-k-a-sequence-points sequenced in C 0x than C 03 the side effects are not. Two side effects in the same expression unless otherwise sequenced..
How to implement the factory pattern in C++ correctly http://stackoverflow.com/questions/5120768/how-to-implement-the-factory-pattern-in-c-correctly but still not a general replacement for constructors. 3 Two phase construction Another thing that someone would probably..
How can I create cartesian product of vector of vectors? http://stackoverflow.com/questions/5279051/how-can-i-create-cartesian-product-of-vector-of-vectors Thank you very much Couple of links I looked at one Two Program from program c vector combinations cartesian product..
Why should `new` be used as little as possible? http://stackoverflow.com/questions/6500313/why-should-new-be-used-as-little-as-possible use cases for dynamic allocation as it's less limited. Two key reasons to use dynamic allocation You don't know how much..
http://stackoverflow.com/questions/653980/c-optimization-techniques c c optimization gcc g share improve this question Two ways to write better programs Make best use of language Code..
Is there any reason to use C instead of C++ for embedded development? http://stackoverflow.com/questions/812717/is-there-any-reason-to-use-c-instead-of-c-for-embedded-development most. c c embedded c89 share improve this question Two reasons for using C over C For a lot of embedded processors..
http://stackoverflow.com/questions/982808/c-sfinae-examples IsClassT private typedef char One typedef struct char a 2 Two template typename C static One test int C Will be chosen if.. T is anything except a class. template typename C static Two test ... public enum Yes sizeof IsClassT T test T 0 1 enum No.. type int'. Instead it just uses the ... form which returns Two and thus evaluates to false int is not a class type. share..
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