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c++ Programming Glossary: ffwhy do lambda functions in C++11 not have function<> types? http://stackoverflow.com/questions/11628765/why-do-lambda-functions-in-c11-not-have-function-types function int int int as the type instead of having a different lambda type From the perspective of functional programming.. the perspective of functional programming what's the difference between a function functional object and a lambda If there.. there is a fundamental reason that these two have to be different. I heard that lambda's can be converted to function but..
Should I return const objects? http://stackoverflow.com/questions/12051012/should-i-return-const-objects I return const objects In Effective C Item 03 Use const whenever possible. class Bigint int.. return _data index ... const int operator does make difference from int operator . But what about int foo and const int.. value e.g. class Test public void f void g const Test ff Test const gg ff .f legal ff .g legal gg .f illegal gg .g..
Why does gcc generate 15-20% faster code if I optimize for SIZE instead of speed? http://stackoverflow.com/questions/19470873/why-does-gcc-generate-15-20-faster-code-if-i-optimize-for-size-instead-of-speed silly code that shows this surprising behavior and is sufficiently small to be posted here. const int LOOP_BOUND 200000000.. to the questions as the fno align flags have the same effect. The generated assembly with Os and O2 . Unfortunately my.. correct I grabbed the assembly for O2 and merged all its differences into the assembly for Os except the .p2align lines result..
How to obtain a pointer out of a C++ vtable? http://stackoverflow.com/questions/5099967/how-to-obtain-a-pointer-out-of-a-c-vtable I get a pointer to member which is something totally different. Maybe I could turn the pointer to member into the vtable.. Maybe I could turn the pointer to member into the vtable offset. When I compile the following class Foo public virtual ~Foo.. rdi rdx 13 48 8b 07 mov rax QWORD PTR rdi 16 48 8b 74 30 ff mov rsi QWORD PTR rax rsi 1 0x1 1b ff e6 jmp rsi 1d 0f 1f 00..
http://stackoverflow.com/questions/5499155/c-member-function-pointer filter FILTER_NEGATION ... void do_filter filter_function ff std list std string arg bool mark false bool negation false.. f f.filter Foo events_filter ... And invoke it with this ff ... the parenthesis around this ff are important If you want.. And invoke it with this ff ... the parenthesis around this ff are important If you want to be able to pass any kind of function..
how do I print an unsigned char as hex in c++ using ostream? http://stackoverflow.com/questions/673240/how-do-i-print-an-unsigned-char-as-hex-in-c-using-ostream it as char. If I have unsigned char a 0 unsigned char b 0xff cout a is hex a b is hex b endl then the output is a is ^@ b.. then the output is a is ^@ b is 377 instead of a is 0 b is ff I tried using uint8_t but as I mentioned before that's typedef'ed.. std cout hex a std endl It's short to write has the same efficiency as the original solution and it lets you choose to use..
How can I create directory tree in C++/Linux? http://stackoverflow.com/questions/675039/how-can-i-create-directory-tree-in-c-linux @ # Purpose Create all directories in path @ # Author J Leffler @ # Copyright C JLSS 1990 91 1997 98 2001 2005 2008 2012.. @ # Id mkpath.c v 1.13 2012 07 15 00 40 37 jleffler Exp #endif lint static int do_mkdir const char path mode_t.. sa 32 ad 13 23 13 12 13 sd ds ww qq ss dd zz xx dd rr ff ff ss ss ss ss ss ss ss ss MKPATH mkpath . MKPATH NAME ...repeat..
Is there a generic way to adapt a function template to be a polymorphic function object? http://stackoverflow.com/questions/7033645/is-there-a-generic-way-to-adapt-a-function-template-to-be-a-polymorphic-function will need to call it with arguments of several different types. I could adapt my function templates to be polymorphic.. an overloaded name f how to concisely write an object ff such that ff a0 a1 a2 ... ultimately calls f a0 a1 a2 ... ... name f how to concisely write an object ff such that ff a0 a1 a2 ... ultimately calls f a0 a1 a2 ... . A polymorphic..
In which scenario it is useful to use Disassembly language while debugging http://stackoverflow.com/questions/1565567/in-which-scenario-it-is-useful-to-use-disassembly-language-while-debugging dword ptr result 00637CEC 50 push eax 00637CED E8 3E E3 FF FF call getRequiredFields 00636030 00637CF2 83 C4 0C add Language.. ptr result 00637CEC 50 push eax 00637CED E8 3E E3 FF FF call getRequiredFields 00636030 00637CF2 83 C4 0C add Language..
Writing utf16 to file in binary mode http://stackoverflow.com/questions/207662/writing-utf16-to-file-in-binary-mode this happens EDIT Opening the file in a hex editor I get FF FE 68 00 00 00 65 00 00 00 6C 00 00 00 6C 00 00 00 6F 00 00..
How to identify the file content as ASCII or binary http://stackoverflow.com/questions/277521/how-to-identify-the-file-content-as-ascii-or-binary for a byte order mark If the first two bytes are hex FE FF the file is tentatively UTF 16 BE. If the first two bytes are.. is tentatively UTF 16 BE. If the first two bytes are hex FF FE and the following two bytes are not hex 00 00 the file is.. UTF 16 LE. If the first four bytes are hex 00 00 FE FF the file is tentatively UTF 32 BE. If the first four bytes are..
http://stackoverflow.com/questions/479373/c-cout-hex-values hex values I want to do int a 255 cout a and have it show FF in the output how would i do this c hex cout share improve..
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