Hi, On Wed, Sep 08, 2004 at 10:59:32AM +0400, Vladimir Prus wrote:
Hello, suppose I have a string "module.foo1.port" and want to get the second dot-separated element. I think I can use the 'split' algorithm, but it does not look very convenient, I need to declare container, then call split and then obtain the result.
You can also use split_iterator. #include <boost/algorithm/string/find_iterator.hpp> #include <boost/algorithm/string/finder.hpp> using namespace boost; std::string str="module.foo1.port"; typedef split_iterator<std::string::iterator> string_split; string_split it(str, token_finder(is_any_of(".")); // *it="module" ++it; // *it="foo1" ++it; // *it="port" ++it; // it.eof()==true it=string_split(); *it is an iterator_range, pointing to the input. You can easily convert it to a string std::string match=copy_iterator_range<std::string>(*it);
In Qt, there's QString::section method, which allows to do this in one line. Here's example from the docs:
QString csv( "forename,middlename,surname,phone" ); QString s = csv.section( ',', 2, 2 ); // s == "surname"
And the complete docs are at:
http://doc.trolltech.com/3.3/qstring.html#section
Maybe, something like this can be added?
Seem useful. I will see, how it can be added. Thanks for an idea. Regards, Pavol.