#include <boost/foreach.hpp> vector<string> ids; BOOST_FOREACH(string id, ids) { // do something with id }
#include <boost/foreach.hpp> #include <boost/tuple/tuple.hpp> std::map<int, std::string> theMap; int key; std::string value; BOOST_FOREACH(boost::tuples::tie(key, value), theMap) { std::cout << key << " => " << value << "\n"; }
#include <boost/algorithm/string.hpp> vector<string> splitResult; boost::split(splitResult,"wir;funktionieren;automatik;;",boost::is_any_of(";,.")); // results in |wir|funktionieren|automatik|
Note Boost's split behaviour where two separators meet in a string: split creates an empty element to signal there's no data between those two separators. Thus it's possible to reconstruct the original string.
#include <boost/algorithm/string.hpp> vector<string> data_bits; string data_copy = boost::join(data_bits,",");
#include <boost/lexical_cast.hpp> int i = boost::lexical_cast<int>("2");
vector<int> a,b; a.insert(a.end(),b.begin(),b.end());
Sometimes a container with fast access possibilities AND insertion order preserving capability is needed. Boost's multi_index_container helps (see http://docs.huihoo.com/boost/1-33-1/libs/multi_index/doc/tutorial.html#seq_indices here for more): Use a sequenced index together with oder indizes of your choice.
f → fleetid
t → timestamp…
#include <boost/multi_index_container.hpp> #include <boost/multi_index/member.hpp> #include <boost/multi_index/sequenced_index.hpp> #include <boost/multi_index/ordered_index.hpp> namespace bmi = boost::multi_index; struct FlagInfo { std::string flag; // eg. F std::string full_name; // eg. fleetid FlagInfo(std::string f,std::string n):flag(f),full_name(n) {} }; struct flag{}; // to access the tag /** a map/list hybridcontainer preserving insertion order and indexing by flag*/ typedef bmi::multi_index_container< FlagInfo, bmi::indexed_by< bmi::sequenced<>, bmi::ordered_unique< bmi::tag<flag>, BOOST_MULTI_INDEX_MEMBER(FlagInfo,std::string,flag)> > > FlagList; // map/list-like container typedef FlagList::iterator FlagListIterator;
FlagList flag_list; flag_list.get<1>().insert(FlagInfo("o","orthdist")); // use index 1 of FlagInfo container flag_list.get<1>().insert(FlagInfo("f","fleetid")); // use index 1 of FlagInfo container
FlagList::nth_index<1>::type::iterator itr = flag_list.get<1>().find(flag); // use first index if (itr != flag_list.get<1>().end()) { cout << itr->full_name << endl; }