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c++ Programming Glossary: updateWhy 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 branching in critical loops. such as in this example Update GCC 4.6.1 with O3 or ftree vectorize on x64 is able to generate..
Is gcc4.7 buggy about regular expressions? [duplicate] http://stackoverflow.com/questions/12530406/is-gcc4-7-buggy-about-regular-expressions LLVM compiler. Any ideas about how to solve the issue Update one possible solution is to use groups to implement multiple..
Dynamically allocating an array of objects http://stackoverflow.com/questions/255612/dynamically-allocating-an-array-of-objects appreciated since it's been a while since I did C . Update for future viewers All of the answers below are really helpful...
Read whole ASCII file into C++ std::string http://stackoverflow.com/questions/2602013/read-whole-ascii-file-into-c-stdstring line to buffer and go on t.close Any ideas Current Answer Updated on Dec 5 2012 Tyler McHenry pointed out that his initial clever.. file io standard library share improve this question Update Turns out that this method while following STL idioms well is..
Simple example of threading in C++ http://stackoverflow.com/questions/266168/simple-example-of-threading-in-c as opposed to calling a C style thread library. Thanks. Update I left out any OS specific requests in the hopes that whoever..
c++ call constructor from constructor http://stackoverflow.com/questions/308276/c-call-constructor-from-constructor Foo init char x int y ... see this link for reference. Update Google rates this question high so I think it's necessary to..
Should I use static_cast or reinterpret_cast when casting a void* to whatever http://stackoverflow.com/questions/310451/should-i-use-static-cast-or-reinterpret-cast-when-casting-a-void-to-whatever to the original pointer type will have its original value. Update The committee is going to allow reinterpret_cast from and to..
Windows threading: _beginthread vs _beginthreadex vs CreateThread C++ http://stackoverflow.com/questions/331536/windows-threading-beginthread-vs-beginthreadex-vs-createthread-c _beginthread instead of CreateThread or vice versa. Cheers Update OK thanks for all the info I've also read in a couple of places..
Pretty-print C++ STL containers http://stackoverflow.com/questions/4850473/pretty-print-c-stl-containers Please take note of the updates at the end of this post. Update I have created a public project on GitHub for this library I.. out if something has the necessary iterator Many thanks Update and solution After raising this problem again on Channel 9 I.. The helper wrap_array can be used to print raw C arrays. Update Pairs and tuples are available for printing default delimiters..
What's this STL vs. “C++ Standard Library” fight all about? [closed] http://stackoverflow.com/questions/5205491/whats-this-stl-vs-c-standard-library-fight-all-about I hope this helps to explain the battle a bit better. Update 13 04 2011 Here are three perfect examples of someone who is..
How does the Comma Operator work http://stackoverflow.com/questions/54142/how-does-the-comma-operator-work on here for someone to find the answer quickly. Update This question has exposed a nuance when using the comma operator...
How to build Qt for Visual Studio 2010 http://stackoverflow.com/questions/5601950/how-to-build-qt-for-visual-studio-2010 errors like this or when started from Visual Studio 2010 Update I found a blog post analysing why does it work for some people.. Downloading Qt On http qt.nokia.com downloads click LGPL. Update new link is here http qt project.org downloads You should not..
Do the parentheses after the type name make a difference with new? http://stackoverflow.com/questions/620137/do-the-parentheses-after-the-type-name-make-a-difference-with-new cannot have them and sometimes it doesn't matter. C 11 Update C 11 introduced a uniform initialization syntax . Before this..
When should I use the new keyword in C++? http://stackoverflow.com/questions/655065/when-should-i-use-the-new-keyword-in-c to use with the std C classes. Which method should I use Update 1 I recently used the new keyword for heap memory or free store.. to heap usage ensured that the elements were in tact. Yay Update 2 A friend of mine recently told me there's a simple rule for..
http://stackoverflow.com/questions/1115876/autocompletion-in-vim Additionally the tags file once again needs to be updated manually. I'm aware of the fact that not even modern full blown.. which may be huge . Did I forget anything Feel free to update. I'm comfortable with quite a lot of configuration and or tinkering..
When to use dynamic vs. static libraries http://stackoverflow.com/questions/140061/when-to-use-dynamic-vs-static-libraries wasn't the original one that shipped with your code if the update is considered binary compatible with the original version. Additionally..
C++ STL set update is tedious: I can't change an element in place http://stackoverflow.com/questions/2217878/c-stl-set-update-is-tedious-i-cant-change-an-element-in-place STL set update is tedious I can't change an element in place I find the update.. is tedious I can't change an element in place I find the update operation on set tedious since there's no such an API on cppreference.. find element in set by iterator Element copy iterator ... update member value on copy varies Set.erase iterator Set.insert copy..
Read whole ASCII file into C++ std::string http://stackoverflow.com/questions/2602013/read-whole-ascii-file-into-c-stdstring coder To Tyler McHenry if you found his answer and later update as beneficial as I did please up vote his answer . c string..
What happens if you call erase() on a map element while iterating from begin to end? http://stackoverflow.com/questions/263945/what-happens-if-you-call-erase-on-a-map-element-while-iterating-from-begin-to see this answer Mark Ransom Technique But you do need to update your code In your code you increment pm_it after calling erase...
http://stackoverflow.com/questions/2979209/using-fflushstdin FILE ostream ostream points to an output stream or an update stream in which the most recent operation was not input the..
c++ call constructor from constructor http://stackoverflow.com/questions/308276/c-call-constructor-from-constructor no way to do this in C it's possible in C 11 though see update at the bottom . two ways of simulating this 1 You can combine.. rates this question high so I think it's necessary to update it with current information. C 11 has been finalized and it..
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 from the prior assumption of 0.6 . So Bayes allows us to update our estimate of the probable cost of I . If the amount of data..
Flags to enable thorough and verbose g++ warnings http://stackoverflow.com/questions/5088460/flags-to-enable-thorough-and-verbose-g-warnings numbers 1 is out of the domain . I later go through and update 1.0f values. It does not easily lend itself to a different method..
Can you remove elements from a std::list while iterating through it? http://stackoverflow.com/questions/596162/can-you-remove-elements-from-a-stdlist-while-iterating-through-it item iterator i items.begin i items.end i bool isActive i update if isActive items.remove i else other_code_involving i items.remove_if.. I'd like remove inactive items immediately after update them inorder to avoid walking the list again. But if I add the.. iterator i items.begin while i items.end bool isActive i update if isActive items.erase i alternatively i items.erase i else..
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 analogy but whatever. I thought it might be germane to update this a bit with a few more technical thoughts. Compilers are..
Create WCF service for unmanaged C++ clients http://stackoverflow.com/questions/686452/create-wcf-service-for-unmanaged-c-clients ^ client Abort return rv The only thing left to do is update the MFC application to invoke the SayHello WCF service call...
Windows 7 timing functions - How to use GetSystemTimeAdjustment correctly? http://stackoverflow.com/questions/7685762/windows-7-timing-functions-how-to-use-getsystemtimeadjustment-correctly if it is at which interval and with which increment it is updated see GetSystemTimeAdjustment function on MSDN . From this I.. should either get no change the system clock has not been updated or a change which is a multiple of the increment retrieved.. end it prints the increment with which the system clock is updated. I would expect the differences between the timestamps printed..
Why is reading lines from stdin much slower in C++ than Python? http://stackoverflow.com/questions/9371238/why-is-reading-lines-from-stdin-much-slower-in-c-than-python and recap Hello HN readers For completeness I thought I'd update the read speed for the same file on the same box with the original..
Example for boost shared_mutex (multiple reads/one write)? http://stackoverflow.com/questions/989795/example-for-boost-shared-mutex-multiple-reads-one-write has to read some data often and occasionally that data is updated. Right now a mutex keeps access to that data safe but it's.. able to read simultaneously and only lock them out when an update is needed the updating thread could wait for the other threads..
Start thread with member function http://stackoverflow.com/questions/10673585/start-thread-with-member-function this std thread spawn return std thread blub test this UPDATE I want to explain some more points some of them have also been..
Eclipse CDT: Symbol 'cout' could not be resolved http://stackoverflow.com/questions/10803685/eclipse-cdt-symbol-cout-could-not-be-resolved outDesc ... std cout test std endl ... using namespace std UPDATE I had created the eclipse project from existing code. Creating..
Turn off eclipse errors (that arent really errors) [duplicate] http://stackoverflow.com/questions/14131939/turn-off-eclipse-errors-that-arent-really-errors that c c 11 eclipse cdt share improve this question UPDATE I have found a true solution and not just a workaround see Eclipse..
somehow register my classes in a list http://stackoverflow.com/questions/1691473/somehow-register-my-classes-in-a-list to call the constructor of MyClasses at program startup. UPDATE Following gf suggestion you can write this #define REGISTER_CLASS..
http://stackoverflow.com/questions/199418/using-c-library-in-c-code code and or documentation available regarding this Thanks UPDATE Some other things that I have found out Use the following to..
Linking static libraries to other static libraries http://stackoverflow.com/questions/2157629/linking-static-libraries-to-other-static-libraries can distribute just Y for people to link their programs to UPDATE I've looked at just dumping everything with ar and making one..
Calling class method through NULL class pointer http://stackoverflow.com/questions/2505328/calling-class-method-through-null-class-pointer is alright while execution since you do not use this arg. UPDATE Thanks to Windows programmer for right comment Such code is..
Can I use a binary literal in C or C++? http://stackoverflow.com/questions/2611764/can-i-use-a-binary-literal-in-c-or-c used in C programs as well it is 100 preprocessor driven. UPDATE To do the converse i.e. print out a number in binary form you..
What happens if you call erase() on a map element while iterating from begin to end? http://stackoverflow.com/questions/263945/what-happens-if-you-call-erase-on-a-map-element-while-iterating-from-begin-to if pm_it second delete_this_id port_map.erase pm_it first UPDATE Of course I then read this question which I didn't think would..
Unmangling the result of std::type_info::name http://stackoverflow.com/questions/281818/unmangling-the-result-of-stdtype-infoname c gcc name mangling share improve this question UPDATE the accepted answer as of Sep 7 2013 when the call to abi __cxa_demangle..
Programmatically create static arrays at compile time in C++ http://stackoverflow.com/questions/2978259/programmatically-create-static-arrays-at-compile-time-in-c no macros no pp or code generator based solutions pls UPDATE Georg Fritzsche's solution is amazing needs a little work to..
What belongs in an educational tool to demonstrate the unwarranted assumptions people make in C/C++? http://stackoverflow.com/questions/3457967/what-belongs-in-an-educational-tool-to-demonstrate-the-unwarranted-assumptions-p that people want to edit my blabber when they read this. UPDATE Thanks for your input. I've added a few cases from your answers.. see if I can set up a github for this like Greg suggested. UPDATE I've created a github repo for this the file is gotcha.c http..
http://stackoverflow.com/questions/347358/inheriting-constructors A int x class B public A public explicit B int x A x UPDATE In C 11 constructors can be inherited. See Suma's answer for..
Checking if a double (or float) is nan in C++ http://stackoverflow.com/questions/570669/checking-if-a-double-or-float-is-nan-in-c function p.s. I'm in mingw if that makes a difference UPDATE Thanks for the responses I had this solved by using isnan form..
C++ obtaining milliseconds time on Linux — clock() doesn't seem to work properly http://stackoverflow.com/questions/588307/c-obtaining-milliseconds-time-on-linux-clock-doesnt-seem-to-work-properl third party libraries Is there no standard way to do this UPDATE Please don't recommend Boost .. If Boost and Qt can do it surely..
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 by having much stricter control over keys for example. UPDATE Holy goodness this answer is getting a lot of attention. I'm..
http://stackoverflow.com/questions/8896/memcached-on-windows-x64 available http labs.northscale.com memcached packages UPDATE they have recently released Memcached Server still FREE but.. and download at http www.northscale.com download.php a d UPDATE 2 NorthScale Memcached is no longer available as a standalone..
Why does const imply internal linkage in C++, when it doesn't in C? http://stackoverflow.com/questions/998425/why-does-const-imply-internal-linkage-in-c-when-it-doesnt-in-c when it doesn't in C See subject. What were they thinking UPDATE Changed from static to internal linkage to save confusion. To..
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