C++Talk.NET C++ language newsgroups   Archives   FAQ   Search   Memberlist   Usergroups   Register   Profile   Log in to check your private messages   Log in  Some sort of append algorithm...          C++Talk.NET Forum Index -> C++ language (comp.lang.c++) View previous topic :: View next topic   Author Message deancoo Guest Posted: Sun Feb 27, 2005 12:52 am    Post subject: Some sort of append algorithm... I'm looking for an STL algorithm similar to 'copy', but not needing the target container to have elements available to copy into (a 'valid range'). What I need to do is something simple like, take all the elements in container A and append them to the end of container B (sorting is not necessary). I've looked at set_union and merge, but they don't seem to do the trick. d Back to top Jonathan Turkanis Guest Posted: Sun Feb 27, 2005 12:53 am    Post subject: Re: Some sort of append algorithm... deancoo wrote: Quote: I'm looking for an STL algorithm similar to 'copy', but not needing the target container to have elements available to copy into (a 'valid range'). What I need to do is something simple like, take all the elements in container A and append them to the end of container B If B is a sequence supporting push_back, you can write: std::copy(A.begin(), A.end(), std::back_inserter(B)); Quote: (sorting is not necessary). I've looked at set_union and merge, but they don't seem to do the trick. Quote: d Jonathan Back to top deancoo Guest Posted: Sun Feb 27, 2005 2:43 am    Post subject: Re: Some sort of append algorithm... Quote: If B is a sequence supporting push_back, you can write: std::copy(A.begin(), A.end(), std::back_inserter(B)); Jonathan Why yes you can. Thanks Jonathan. That's going to save me allot of time and complication. Is "back_inserter" is a member function of the sequence? An algorithm of its own? I can't seem to find any reference to it. d Back to top Jonathan Turkanis Guest Posted: Sun Feb 27, 2005 4:39 am    Post subject: Re: Some sort of append algorithm... deancoo wrote: Quote: If B is a sequence supporting push_back, you can write: std::copy(A.begin(), A.end(), std::back_inserter(B)); Jonathan Why yes you can. Thanks Jonathan. That's going to save me allot of time and complication. Is "back_inserter" is a member function of the sequence? An algorithm of its own? I can't seem to find any reference to it. I guess I should have been more explicit. Include the standard header <iterator>. This contains the definition of the clas template back_insert_iterator, whose instances insert elements at the end of a container, and the helper function back_inserter, which takes a reference to a container and returns an instance of an appropriate specialization of back_insert_iterator. There's also an insert_iterator and front_insert_iterator. Quote: d Jonathan Back to top davidrubin@warpmail.net Guest Posted: Sun Feb 27, 2005 4:40 am    Post subject: Re: Some sort of append algorithm... It's in the 'iterator' header file. It's a function template in the 'std' namespace. /david Back to top Display posts from previous: All Posts1 Day7 Days2 Weeks1 Month3 Months6 Months1 Year Oldest FirstNewest First         C++Talk.NET Forum Index -> C++ language (comp.lang.c++) All times are GMT Page 1 of 1   Jump to: Select a forum C/C++----------------C LanguageC Language (Moderated)C++ Language (Moderated)C++ language (comp.lang.c++)C++ language, library and standards Non-English C/C++ Newsgroups----------------C++ (German)C++ (French)  You cannot post new topics in this forum You cannot reply to topics in this forum You cannot edit your posts in this forum You cannot delete your posts in this forum You cannot vote in polls in this forum Powered by phpBB © 2001, 2006 phpBB Group SEO toolkit © 2004-2006 webmedic.