c++ Programming Glossary: operationsWhy 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 eliminates the branch and replaces it with some bitwise operations. Note that this hack is not strictly equivalent to the original..
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 invoke a member function or computing its size are illegal operations on incomplete types if that is needed the full definition of..
dynamical two dimension array according to input http://stackoverflow.com/questions/2216017/dynamical-two-dimension-array-according-to-input Boost implements matrices supporting mathematical operations in its uBLAS library and provides usage syntax like the following...
Undefined, unspecified and implementation-defined behavior http://stackoverflow.com/questions/2397984/undefined-unspecified-and-implementation-defined-behavior nondeterministic abstract machine. Certain aspects and operations of the abstract machine are described in this International.. and behavior in these respects. Certain other aspects and operations of the abstract machine are described in this International.. aspects of the abstract machine. Certain other operations are described in this International Standard as undefined for..
Using arrays or std::vectors in C++, what's the performance gap? http://stackoverflow.com/questions/381621/using-arrays-or-stdvectors-in-c-whats-the-performance-gap generated for basic indexing dereferencing and increment operations on vectors and arrays pointers. Assembly code was generated..
http://stackoverflow.com/questions/4421706/operator-overloading of the stream classes when you implement output and input operations for your own types you cannot change the standard library 䏭..
When to use volatile with multi threading? http://stackoverflow.com/questions/4557979/when-to-use-volatile-with-multi-threading memory fences nor does it ensure the order of execution of operations. It does not make operations atomic. It does not make your code.. the order of execution of operations. It does not make operations atomic. It does not make your code magically thread safe. volatile.. at least Acquire and Release semantics do apply to certian operations on volatile variables. From the MSDN When optimizing the compiler..
What are the barriers to understanding pointers and what can be done to overcome them? http://stackoverflow.com/questions/5727/what-are-the-barriers-to-understanding-pointers-and-what-can-be-done-to-overcome block it references as the actual house. All sorts of operations can thus be easily explained. I've added some Delphi code down.. to give examples of what memory could look like after operations but they are more low level in nature. However in order to accurately..
http://stackoverflow.com/questions/5854581/polymorphism-in-c and macros . Mechanisms for mapping to type specific operations Implicit compiler provided overloads Conceptually the compiler.. arbitrarily large range of types but often want to express operations on them in terms of other functions literals and operations.. on them in terms of other functions literals and operations that were designed for a small set of types. It reduces the..
Compilers and argument order of evaluation in C++ http://stackoverflow.com/questions/621542/compilers-and-argument-order-of-evaluation-in-c to that from my n2798 draft C Certain other aspects and operations of the abstract machine are described in this International..
Is short-circuiting boolean operators mandated in C/C++? And evaluation order? http://stackoverflow.com/questions/628526/is-short-circuiting-boolean-operators-mandated-in-c-c-and-evaluation-order the K R book saying your code shouldn't depend on these operations being short circuited for they may not. Could someone please..
http://stackoverflow.com/questions/712639/understanding-the-meaning-of-the-term-and-the-concept-raii-resource-acquisiti hence we disallow the otherwise implicitly generated copy operations. FileHandle const FileHandle delete FileHandle operator const.. FileHandle operator const FileHandle delete The following operations enable transfer of ownership and require compiler support for..
Are std::vector elements guaranteed to be contiguous? http://stackoverflow.com/questions/849168/are-stdvector-elements-guaranteed-to-be-contiguous it supports amortized constant time insert and erase operations at the end insert and erase in the middle take linear time...
Which kind of pointer do I use when? http://stackoverflow.com/questions/8706192/which-kind-of-pointer-do-i-use-when fully usable in STL containers as long as you don't use operations that need copyable types obviously . Note again that Boost has..
Meaning of acronym SSO in the context of std::string http://stackoverflow.com/questions/10315041/meaning-of-acronym-sso-in-the-context-of-stdstring share improve this question Background Overview Operations on automatic variables from the stack which are variables that..
Conveniently Declaring Compile-Time Strings in C++ http://stackoverflow.com/questions/15858141/conveniently-declaring-compile-time-strings-in-c sequence 'H' 'e' 'l' 'l' 'o' ' ' 'w' 'o' 'r' 'l' 'd' ' ' Operations such as string concatenation substring extraction and many others..
Which Typesafe Enum in C++ Are You Using? http://stackoverflow.com/questions/217549/which-typesafe-enum-in-c-are-you-using name TypesafeEnum const std string n id next_id name n Operations public bool operator const TypesafeEnum right const bool operator..
Extracting text from PDF with Poppler (C++) http://stackoverflow.com/questions/2732178/extracting-text-from-pdf-with-poppler-c render the page this program is executed on a blank page. Operations in the program can include changing colors position current..
STL Rope - when and where to use http://stackoverflow.com/questions/2826431/stl-rope-when-and-where-to-use efficient operation that involve the string as a whole. Operations such as assignment concatenation and substring take time that..
http://stackoverflow.com/questions/2848087/how-to-clear-stringstream eof bit although it successfully parses the first short. Operations on the stream after this immediately fail because the stream's..
Do I need to use locking with integers in c++ threads http://stackoverflow.com/questions/2895614/do-i-need-to-use-locking-with-integers-in-c-threads might be non atomic if it spans a machine word boundary. Operations as simple as m_counter involves a fetch increment and store..
Performance of C++ vs Virtual Machine languages in high frequency finance http://stackoverflow.com/questions/3175072/performance-of-c-vs-virtual-machine-languages-in-high-frequency-finance last fill so there are no cheap caching tricks involved. Operations into the same book are separated by accesses of 22000 different..
Why compiler doesn't allow std::string inside union? http://stackoverflow.com/questions/3521914/why-compiler-doesnt-allow-stdstring-inside-union operation of a union is essentially a bitwise cast. Operations on values contained within unions are only safe when each type..
Atomicity in C++ : Myth or Reality http://stackoverflow.com/questions/5002046/atomicity-in-c-myth-or-reality manual 253668.pdf section 8.1.1 8.1.1 Guaranteed Atomic Operations The Intel486 processor and newer processors since guarantees..
Application crash with no explanation http://stackoverflow.com/questions/5224154/application-crash-with-no-explanation and your machine is already in a very wobbly state. Operations which are normally perfectly safe are suddenly hand grenades...
how portable is end iterator decrement? http://stackoverflow.com/questions/5322104/how-portable-is-end-iterator-decrement Change the specification in table 68 Optional Sequence Operations in 23.1.1 12 for a.back from a.end to iterator tmp a.end tmp..
http://stackoverflow.com/questions/5326564/c-boost-asio-passing-accepted-tcp-connection-from-one-opened-socket-to-anothe inheritance or a call to the DuplicateHandle function. Operations performed with such duplicate handles generate completion notifications...
Class containing auto_ptr stored in vector http://stackoverflow.com/questions/704780/class-containing-auto-ptr-stored-in-vector applicable Requirements subclause 20.1.5 23.1 24.1 26.1 . Operations on such types can report a failure by throwing an exception..
BOOST uBLAS matrix product extremely slow http://stackoverflow.com/questions/7798285/boost-ublas-matrix-product-extremely-slow vs. C i get the following times s for a 2000x2000 matrix Operations OPERATION MATLAB C MSVC10 A B 0.04 0.04 A B 0.04 0.04 AB 1.0..
CreateFile: direct write operation to raw disk “Access is denied” - Vista, Win7 http://stackoverflow.com/questions/8694713/createfile-direct-write-operation-to-raw-disk-access-is-denied-vista-win7 Win7 The relevant Microsoft doc is Blocking Direct Write Operations to Volumes and Disks CreateFile remarks on Physical Disks and..
C++11 Thread safety of Random number generators http://stackoverflow.com/questions/8813592/c11-thread-safety-of-random-number-generators by its specification on those container elements. 6 Operations on iterators obtained by calling a standard library container..
Will my iPhone app take a performance hit if I use Objective-C for low level code? http://stackoverflow.com/questions/926728/will-my-iphone-app-take-a-performance-hit-if-i-use-objective-c-for-low-level-cod C and C in his post Performance Comparisons of Common Operations . Also this post by Savoy Software is an interesting read when..
Why does changing 0.1f to 0 slow down performance by 10x? http://stackoverflow.com/questions/9314534/why-does-changing-0-1f-to-0-slow-down-performance-by-10x close to zero out of the floating point representation. Operations on denormalized floating point can be tens to hundreds of times..
Why are strings immutable in many programming languages? [duplicate] http://stackoverflow.com/questions/9544182/why-are-strings-immutable-in-many-programming-languages There are a couple of minor downsides for immutable types Operations that create a changed string like concatenation are more expensive..
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