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c++ Programming Glossary: a3Why is list initialization (using curly braces) better than the alternatives? http://stackoverflow.com/questions/18222926/why-is-list-initialization-using-curly-braces-better-than-the-alternatives less error prone than the other three MyClass a2 a MyClass a3 a MyClass a4 a Why I couldn't find an answer on SO so let me..
Object Slicing, Is it advantage? http://stackoverflow.com/questions/2389125/object-slicing-is-it-advantage like effect in C using pointers or references B b 24 7 A a3 b No slicing a3 is a pointer to the object b A a4 b No slicing.. C using pointers or references B b 24 7 A a3 b No slicing a3 is a pointer to the object b A a4 b No slicing a4 is a reference..
http://stackoverflow.com/questions/2598579/c-expression-templates double a1 const my_array double a2 my_array double a3 1.2 a1 a1 a2 .. can be optimized all the way down to for my_array.. to for my_array double size_type idx 0 idx a1.size idx a3 idx 1.2 a1 idx a1 idx a2 idx which is faster but harder to understand...
how to swap array-elements to transfer the array from a column-like into a row-like representation http://stackoverflow.com/questions/3009379/how-to-swap-array-elements-to-transfer-the-array-from-a-column-like-into-a-row-l a row like representation For example the array a1 a2 a3 b1 b2 b3 c1 c2 c3 d1 d2 d3 represents following table a1 b1.. d2 d3 represents following table a1 b1 c1 d1 a2 b2 c2 d2 a3 b3 c3 d3 now i like to bring the array into following form a1.. the array into following form a1 b1 c1 d1 a2 b2 c2 d2 a3 b3 c3 d3 Does an algorithm exist which takes the array from..
Why must the copy assignment operator return a reference/const reference? http://stackoverflow.com/questions/3105798/why-must-the-copy-assignment-operator-return-a-reference-const-reference if I have class A and the following A a1 param A a2 a1 A a3 a3 a2 this is the problematic line The operator is defined as.. I have class A and the following A a1 param A a2 a1 A a3 a3 a2 this is the problematic line The operator is defined as follows..
Pretty-print C++ STL containers http://stackoverflow.com/questions/4850473/pretty-print-c-stl-containers std string Jello 9 auto a2 std make_tuple 1729 auto a3 std make_tuple Qrgh a1 11 auto a4 std make_tuple 1729 2875 std.. std endl Pair a1 std endl 1 tuple a2 std endl n tuple a3 std endl n tuple a4 std endl Further ideas for improvements..
C++11 auto: what if it gets a constant reference? http://stackoverflow.com/questions/7138588/c11-auto-what-if-it-gets-a-constant-reference of type int never const int auto a1 i auto a2 ci auto a3 pci auto a4 pcs i During type deduction for template parameters.. a1 is of type int auto a2 ci a2 is of type const int auto a3 pci a3 is also of type const int auto a4 pcs i a4 is of type.. of type int auto a2 ci a2 is of type const int auto a3 pci a3 is also of type const int auto a4 pcs i a4 is of type const..
Is there a way to disable constructor synthesizing on a class? http://stackoverflow.com/questions/7151383/is-there-a-way-to-disable-constructor-synthesizing-on-a-class 10 ok A a2 'x' ok char can convert to int implicitly B b A a3 b ok assume b provides user defined conversion to int Now suppose.. disable Now here you go A a1 10 ok A a2 'x' error B b A a3 b error assume even if b provides user defined conversion to..
http://stackoverflow.com/questions/8542873/c11-auto-semantics return t int main int i 5 int r i auto a1 i auto a2 r auto a3 bar A decltype i foo A decltype r foo A decltype a1 foo A decltype.. a1 foo A decltype a2 foo A decltype bar foo A decltype a3 foo The output value reference value value reference value ..
Operator< and strict weak ordering http://stackoverflow.com/questions/979759/operator-and-strict-weak-ordering if b2 a2 return false a2 b2 continue with element 3 if a3 b3 return true return false early out This orders the elements.. This orders the elements by a1 being most siginificant and a3 least significant. This can be continued ad infinitum you could..
Find out if 2 lines intersect [duplicate] http://stackoverflow.com/questions/14176776/find-out-if-2-lines-intersect intersect Given are two lines l1 A0 B0 A1 B1 and l2 A2 B2 A3 B3 Ax Bx are integers and Ax Bx specify the starts and ends.. in the following equations I abs A0 a A1 A0 A2 b A3 A2 tolerance II abs B0 a B1 B0 B2 b B3 B2 tolerance My method.. determine whether two line segments A0 B0 A1 B1 and A2 B2 A3 B3 intersect is A2 A0 B1 B0 B2 B0 A1 A0 A3 A0 B1 B0 B3 B0 A1..
how to sum a large number of float number? http://stackoverflow.com/questions/2148149/how-to-sum-a-large-number-of-float-number in other words your sequential algorithm Sum A ... A1 A2 A3 A4 ... A10000 May produce a different result from the parallelised.. result from the parallelised version Sum A ... A1 A2 A3 A4 ... A1000 ... A1001 A1002 A1003 A1004 ... A2000 ... A2001.. A1003 A1004 ... A2000 ... A2001 A2002 A2003 A2004 ... A3000 ... ... A9001 A9002 A9003 A9004 ... A10000 since any given..
C++ meta-programming doxygen documentation http://stackoverflow.com/questions/3435225/c-meta-programming-doxygen-documentation class A1 parameter void_ class A2 parameter void_ class A3 parameter void_ class A4 parameter void_ class A5 parameter.. BOOST_XINT_CLASS_APARAMS class A0 class A1 class A2 class A3 class A4 class A5 #define BOOST_XINT_APARAMS A0 A1 A2 A3 A4.. A3 class A4 class A5 #define BOOST_XINT_APARAMS A0 A1 A2 A3 A4 A5 #define BOOST_XINT_CLASS_BPARAMS class B0 class B1 class..
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