hicham's articles:

Items(59) /6 Next >> Last >|

deep/real copy of derived objects 11 23 (8/19/2010 11:11:36 PM) comp.lang.c++ Hello I have a base struct B from which 2 struct D1 and D2 derive publicly. A 3rd struct D3 derives from D1. This is data aggregation. A "manager" class needs to store copies of these objects when its ctor ... Hicham

default contructing an object of unknown type T 32 116 (7/30/2010 10:03:56 AM) comp.lang.c++ Hello, inside a template function, I need an instance of type T that is to be default constructed. I would normally write: template void f(const T&) { const T t(); } This then requires T to ha... Hicham

why aren't comparators passed as refs or c-refs in algorithms? 5 116 (7/19/2010 9:44:32 PM) comp.lang.c++.moderated Hello if you take for example: template ForwardIterator min_element(ForwardIterator first, ForwardIterator last, Compare comp); I am curious why hasn't been chosen to be passed as: template Forward... Hicham

Generating a derived class from a base class 3 152 (6/21/2010 4:40:22 PM) comp.lang.c++.moderated Hello, I have a base class with a number of pure virtual functions. I will have to write a large number of derived classes and I wish to generate the derived class definitions programmatically as containin... Hicham

std::memset, std::fill, hand-written for loop 20 252 (5/31/2010 9:10:27 AM) comp.lang.c++.moderated Hello, Are there any articles comparing the cases/reasons when/why to use memset vs fill, vs writing a loop by hand? Regards, -- [ See http://www.gotw.ca/resources/clcm.htm for info abou... Hicham

cloning struct and derived structs with primitive type members 6 116 (5/13/2010 1:13:09 PM) comp.lang.c++.moderated Hello, I have struct params { double field1; double field2; virtual ~params() {} }; struct params1 : public params { double fielda; double fieldb; }; I have dozens of structs... Hicham

std::merge for n sequences 1 221 (4/15/2010 3:59:09 PM) comp.lang.c++ Hello, is there such a version of the algorithm? regards, ... Hicham

number of distinct elements in a const container and iterating over the distinct elements 1 129 (4/11/2010 10:18:18 AM) comp.lang.c++ Hello, I have posted this question elsewhere: >Given a std::vector and a Compare comparator, how can I: > > 1. determine the number of different elements in the vector? > 2. get iterators to the list of di... Hicham

filtering (a view on) an STL container 5 197 (3/10/2010 1:15:12 PM) comp.lang.c++.moderated Hello, I have in input an STL container say std::vector or std::list called my_container; Is there any advised style re filtering such a container, so that following code can work only on a subset of ... Hicham

integrating plotting in a C++ native application: general questions about which tools to use 2 128 (12/15/2009 10:15:21 PM) comp.lang.c++ Hello, I am writing an application with a native C++ computation engine (library) that generates plotable data 2d and 3d, and a plotting engine. I am trying to determine what tools/libraries to use for th... Hicham

hicham's replies:

Items(25) /3 Next >> Last >|

"partial" iterator? 5 115 (9/3/2010 2:39:20 AM) comp.lang.c++ Hello, I have a std::map>. I often lookup based on the key (std::string) I have a use case where I want to iterate over all the map except for keys that begin with "RF". I could iterate and check if... Hicham

deep/real copy of derived objects 11 23 (8/19/2010 11:11:36 PM) comp.lang.c++ Hello I have a base struct B from which 2 struct D1 and D2 derive publicly. A 3rd struct D3 derives from D1. This is data aggregation. A "manager" class needs to store copies of these objects when its ctor ... hicham (107)

default arguments for class member template function 4 15 (9/15/2009 6:51:19 PM) comp.lang.c++ Hello, I am debugging (vs2008) the following code: I type the URL weirdly here because I think messages with URL are rejected: h t t p : / / codepad . org / zy3WFbe7 Please ignore all spaces when you paste ... hicham (107)

SVO 3 23 (9/11/2009 11:06:37 AM) comp.lang.c++ Hi, I have data that looks like: x f(x) ------ --------- 0.5 7.8 0.9 6.7 -5.4 6.6 0.0 6.6 1.5 7.8 The number of points is variable bu... hicham (107)

Never ever use a raw pointer when a smart pointer can do the same job 105 15 (8/13/2009 3:15:44 PM) comp.lang.c++ .... my colleague says. I disagree on the "Never". Opinions about this "rule of thumb" welcome. regards, ... hicham (107)

enum names inside a templated class 3 13 (8/7/2009 11:54:58 AM) comp.lang.c++ hi, template struct C { typedef typename Traits::E1 E1; .... static void f(); }; template::f() { // E1 is an enum { x1, x2... } in this case // I wanted to use x1 x2 ... without scoping // 1. ... hicham (107)

switch statement to detect handling of ALL derived classes 13 15 (8/3/2009 7:58:51 AM) comp.lang.c++ Imagine we have an abstract base class ABC and derived classes D1, D2, ... Dn I am being told a code pattern to "enforce" all cases are handled is such: enum ABCTypes { D1Tag, D2Tag, .... DnTag }; const AB... hicham (107)

make a common interface to boost::array<..., maxsize> and std::vector<...> 2 17 (7/6/2009 5:17:43 PM) comp.lang.c++ Hi, I have a situation where behind the scenes I implement a container either as 1. boost::array + size_t current_size this array would be contained in some class "Container" that behaves as closely as possib... hicham (107)

constructor that depends whether the object being constructed is const or not 17 21 (7/2/2009 4:22:47 PM) comp.lang.c++ Hi, is there a way to have 1 ctor called when I construct object of type O like const O o(data); // o will not change after and another ctor when I construct a non-const instance, for e.g. O o; or O o(data); a... hicham (107)

contiguous in memory 19 15 (4/30/2009 3:33:34 PM) comp.lang.c++ void f() { auto v1; auto v2; // consecutive in source code .... } Are there any guarantees by c++ that the 2 auto variables are such that &v2 == &v1 + sizeof(v1) ? are they contiguous? if not, my q... hicham (107)