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c++ Programming Glossary: theyWhat are the rules about using an underscore in a C++ identifier? http://stackoverflow.com/questions/228783/what-are-the-rules-about-using-an-underscore-in-a-c-identifier variables with some kind of prefix to denote the fact that they're member variables rather than local variables or parameters... for your own purposes right now might not cause a problem they do raise the possibility of conflict with future versions of..
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 programmers tend to be skeptical of this technique unless they've used it themselves. They will say that profilers give you.. give you this information but that is only true if they sample the entire call stack. Call graphs don't give you the.. Call graphs don't give you the same information because 1 they don't summarize at the instruction level and 2 they give confusing..
http://stackoverflow.com/questions/4172722/what-is-the-rule-of-three them. The implementation will implicitly define them if they are used. ... end note n3126.pdf section 12 §1 By default copying..
http://stackoverflow.com/questions/4421706/operator-overloading users sort answers according to votes rather than the time they were given here's an index of the answers in the order in which.. given here's an index of the answers in the order in which they make most sense The General Syntax of operator overloading in.. for which the syntax specifies no restriction on whether they should be members or non members. Since they change their left..
Why can templates only be implemented in the header file? http://stackoverflow.com/questions/495021/why-can-templates-only-be-implemented-in-the-header-file case int . If these implementations were not in the header they wouldn't be accessible and therefore the compiler wouldn't be..
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 a discriminated union capable of holding C types even if they have destructors etc. I implemented this as a Russian doll i.e... a C program you need to know for certain names whether they name types or non types. The following should suffice as an.. unqualified names are always known to refer to types if they do so. A similar gotcha exists for names that denote templates..
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 with them that said that if you leave stuff behind they'll shred it for you. If you illegally re enter your room with.. hotel . We use stacks for temporary stores because they are really cheap and easy. An implementation of C is not required..
Storing C++ template function definitions in a .CPP file http://stackoverflow.com/questions/115703/storing-c-template-function-definitions-in-a-cpp-file FAQ Lite http www.parashift.com c faq lite templates.html They go into a lot of detail about these and other template issues...
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 protecting my header files from mutual recursive inclusion They are . What they are not helping with is dependencies between.. Why aren't include guards preventing multiple definitions They are . What they are not protecting you from is multiple definitions..
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 temporary object and that solves our problem. In addition They say assigning a temporary object to the const reference extends..
Why does an overridden function in the derived class hide other overloads of the base class? http://stackoverflow.com/questions/1628768/why-does-an-overridden-function-in-the-derived-class-hide-other-overloads-of-the to foo NULL resolve to if made through an object of type D They will resolve to D foo int since int is a better match for integral..
When should I write the keyword 'inline' for a function/method? http://stackoverflow.com/questions/1759300/when-should-i-write-the-keyword-inline-for-a-function-method function. Note Declaring templates inline is worthless. They have the linkage semantics of inline already. So specific answers..
What's the best way to trim std::string http://stackoverflow.com/questions/216823/whats-the-best-way-to-trim-stdstring inline std string trim std string s return ltrim rtrim s They are fairly self explanatory and work very well. EDIT btw I have..
What is the difference between new/delete and malloc/free? http://stackoverflow.com/questions/240212/what-is-the-difference-between-new-delete-and-malloc-free chunk of memory simple No copy constructor to worry about They will NOT call new delete No way to splice user code into the..
Read whole ASCII file into C++ std::string http://stackoverflow.com/questions/2602013/read-whole-ascii-file-into-c-stdstring argument to the string constructor. These are essential . They prevent the problem known as the most vexing parse which in..
What does int argc, char *argv[] mean? http://stackoverflow.com/questions/3024197/what-does-int-argc-char-argv-mean int main int num_args char arg_strings is equally valid. They can also be omitted entirely yielding int main if you do not..
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 of this technique unless they've used it themselves. They will say that profilers give you this information but that is.. give confusing summaries in the presence of recursion. They will also say it only works on toy programs when actually it..
http://stackoverflow.com/questions/408670/stack-static-and-heap-in-c they are located but which isn't needed outside that code. They are also really nice for when you are accessing a resource like..
What are Aggregates and PODs and how/why are they special? http://stackoverflow.com/questions/4178175/what-are-aggregates-and-pods-and-how-why-are-they-special get the idea. Now let's see how aggregates are special. They unlike non aggregate classes can be initialized with curly braces..
Thou shalt not inherit from std::vector http://stackoverflow.com/questions/4353203/thou-shalt-not-inherit-from-stdvector especially such common aren't going to live in vacuum. They will live in mixed environment with constantly increased entropy...
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 the parts labelled Memory layout in the explanation below. They are intended to give examples of what memory could look like..
Unicode encoding for string literals in C++11 http://stackoverflow.com/questions/6796157/unicode-encoding-for-string-literals-in-c11 UTF 16 encoded string. u8 creates a UTF 8 encoded string. They will be encoded per the Unicode specification. In 1 can I write.. std basic_string doesn't deal with Unicode encodings. They certainly can store UTF encoded strings. But they can only think..
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 Welcome to the world of denormalized floating point They can wreak havoc on performance Denormal or subnormal numbers..
Linux API to list running processes? http://stackoverflow.com/questions/939778/linux-api-to-list-running-processes view markup Is the source of ps and other process tools. They do indeed use proc indicating it is probably the conventional..
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