c++ Programming Glossary: howeverWhy 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 ... NNNNNNNTTTTTTTTT ... TTTTTTTTTT easy to predict However when the data is completely random the branch predictor is rendered..
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 the same as the two above extern double f int double However it must be defined exactly once. If you forget to define something..
Most vexing parse: why doesn't A a(()); work? http://stackoverflow.com/questions/1424510/most-vexing-parse-why-doesnt-a-a-work as the declaration of an object A a B declares an object However in the second case doing the same leads to a compile error A..
Why is “using namespace std;” considered bad practice? http://stackoverflow.com/questions/1452721/why-is-using-namespace-std-considered-bad-practice programs and that std cout and std cin are more proper. However they would always be vague as to why this is a bad practice...
What is the copy-and-swap idiom? http://stackoverflow.com/questions/3279543/what-is-the-copy-and-swap-idiom we're finished this now manages an array without leaks. However it suffers from three problems marked sequentially in the code..
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 goal is to use a profiler use one of the suggested ones. However if you're in a hurry and you can manually interrupt your program..
http://stackoverflow.com/questions/4421706/operator-overloading Operator There's a lot to be said about assignment. However most of it has already been said in GMan's famous Copy And Swap.. be implemented as members of their left operand 䏭 type. However their left operands are streams from the standard library and.. std map will always only expect operator to be present. However the users of your type will expect all the other operators to..
http://stackoverflow.com/questions/4810664/how-do-i-use-arrays-in-c for arrays does not arise quite as often as it does in C. However when you read legacy code or interact with a library written.. leads to the following interesting equivalence x i x i x i However x 0 is generally not equivalent to x . The former is a pointer..
How do I tokenize a string in C++? http://stackoverflow.com/questions/53849/how-do-i-tokenize-a-string-in-c case can easily be built using the std string find method. However take a look at Boost.Tokenizer . It's great. Boost generally..
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 after operations but they are more low level in nature. However in order to accurately explain how buffer overruns really work.. know if you need to deal with memory on a low level basis. However for the intents of explaining memory and pointers it is accurate..
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 and semantically it will declare f as a pointer variable . However if it's a non type it will be parsed as an expression. So the.. zero int and then compares the resulting bool against f . However as you might well know boost function in real life is a template..
Where do I find the current C or C++ standard documents? http://stackoverflow.com/questions/81656/where-do-i-find-the-current-c-or-c-standard-documents ones the answer seems to be found in the standard . However where do we find that online Googling can sometimes feel futile.. refer to those answers or Google for download locations . However in my opinion even though the draft versions might be very close..
What is a smart pointer and when should I use one? http://stackoverflow.com/questions/106508/what-is-a-smart-pointer-and-when-should-i-use-one from being deleted multiple times incorrectly . You can however pass references to it around to other functions you call. Scoped..
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 report an error. When include guards are present however no infinite recursion will be set up in step 4. Let's see why..
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 doesn't know what ref returns . This is just a guess however. 2 I stated the purpose clearly you are not allowed to modify..
What is this weird colon-member syntax in the constructor? http://stackoverflow.com/questions/1711990/what-is-this-weird-colon-member-syntax-in-the-constructor all member objects in the member initialization list however do note the exceptions listed at the end of the FAQ entry ...
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
What is the copy-and-swap idiom? http://stackoverflow.com/questions/3279543/what-is-the-copy-and-swap-idiom regards to exceptions must be given in a more general case however std copy other.mArray other.mArray mSize mArray destructor..
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 more on that later . A T something something_else is safe however and guaranteed to call the constructor. static_cast can also.. cast through virtual inheritance. It does not do checking however and it is undefined behavior to static_cast down a hierarchy.. protected or private inheritance. This is rarely an issue however as such forms of inheritance are rare. reinterpret_cast is the..
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 with stdin they are usually line buffered . You can however use a library for that conio available with windows compilers...
Why are C character literals ints instead of chars? http://stackoverflow.com/questions/433895/why-are-c-character-literals-ints-instead-of-chars literal and sizeof char 1 as defined by the standard. In C however sizeof 'a' sizeof int . That is it appears that C character..
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 process that determines this is called name lookup. This however presents a problem in templates How will you find out what a.. that are names is called dependent name . Function names however may have different meaning in different instantiations of a..
Unicode encoding for string literals in C++11 http://stackoverflow.com/questions/6796157/unicode-encoding-for-string-literals-in-c11 string functions are totally useless It should be noted however that length for a Unicode string does not mean the number of..
What is a lambda expression in C++11? http://stackoverflow.com/questions/7627098/what-is-a-lambda-expression-in-c11 operator int do something f std for_each v.begin v.end f however this is not allowed f cannot be passed to a template function.. v.begin v.end v.begin double d return d 0.00001 0 d however when you start to write more complex lambdas you will quickly.. call with the same input would produce the same result however you can mark the lambda as mutable to request that the operator..
What is “rvalue reference for *this”? http://stackoverflow.com/questions/8610571/what-is-rvalue-reference-for-this match 'test ' rvalue reference kept in overload set Note however that had we not provided any ref qualifier and as such not overloaded..
how to find the location of the executable in C http://stackoverflow.com/questions/933850/how-to-find-the-location-of-the-executable-in-c to set argv 0 correctly. It is right most of the times however there are occasions when the calling process cannot be trusted..
|