Ronald Laeremans, VC++ Product Unit Manager, even said to use STL in June 2006: And frankly the team will give you the same answer. The MFC collection classes are only there for backwards compatibility. C++ has a standard for collection classes and that is the Standards C++ Library. There is no technical drawback for using … Read more
This blog post lists some reasons why you should not run production databases in containers. It also references another blog post describing problems with updating docker and unstable storage drivers. The main points here for me boil down to this: Dodgy storage drivers. This may be less of a problem when you write your database … Read more
Containers in different networks can not communicate with each other because iptables drop such packets. This is shown in the DOCKER-ISOLATION-STAGE-1 and DOCKER-ISOLATION-STAGE-2 chains in the filter table. sudo iptables -t filter -vL Rules can be added to DOCKER-USER chain to allow communication between different networks. In the above scenario, the following commands will allow … Read more
Two things are happening here. You are not using the container class properly. You are trying to override Bootstrap’s CSS for the container class Bootstrap uses a grid system and the .container class is defined in its own CSS. The grid has to exist within a container class DIV. The container DIV is just an … Read more
You can’t efficiently search for substring, but you can for prefix: #include <iostream> #include <map> #include <string> #include <algorithm> using namespace std; typedef map<string, string> TStrStrMap; typedef pair<string, string> TStrStrPair; TStrStrMap::const_iterator FindPrefix(const TStrStrMap& map, const string& search_for) { TStrStrMap::const_iterator i = map.lower_bound(search_for); if (i != map.end()) { const string& key = i->first; if (key.compare(0, search_for.size(), … Read more
For what you need, List<string> is probably the most versatile. StringCollection was handy in 1.1, when (without generics) you needed specific classes for typed collections. Collection<string> is handy if you want to subclass it to provide validation etc. Either way, in 3.5, LINQ will provide lots of additional methods for them – but without LINQ, … Read more
std::vector has several accessibility and modification operations compared to std::stack. In case of std::stack, you may have to perform operations only in systematic way, where you can push() above the last element or pop() the last element. std::vector is more flexible in that sense, where it has several operations, where you can insert() in between … Read more
Here are some articles you might find of interest Giving STL Iterators a Base Class Type Erasure for C++ Iterators any_iterator Class Reference
You can use std::multimap<char, int>::equal_range, which will give you an iterator range containing all pairs which have a certain key. So if you look for ‘b’, you will get an iterator range containing all pairs which have ‘b’ as the key. You can then simply iterate over the range, and erase any pair you see … Read more
Use std::copy_n std::array<T, N> arr; std::copy_n(vec.begin(), N, arr.begin()); Edit: I didn’t notice that you’d asked about moving the elements as well. To move, wrap the source iterator in std::move_iterator. std::copy_n(std::make_move_iterator(v.begin()), N, arr.begin());