I want to join a vector<string> into a single string, separated by spaces. For example,
sample
string
for
this
example
should become "sample string for this example".
What is the simplest way to do this?
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Camille Goudeseune
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Shree
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2 Answers
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#include <iterator>
#include <iostream>
#include <sstream>
#include <vector>
#include <algorithm>
std::vector<std::string> v;
...
std::stringstream ss;
std::copy(v.begin(), v.end(), std::ostream_iterator<std::string>(ss, " "));
std::string result = ss.str();
if (!result.empty()) {
result.resize(result.length() - 1); // trim trailing space
}
std::cout << result << std::endl;
Alex B
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It's a shame about the need to trim the trailing space though. – the_mandrill Sep 27 '10 at 14:16
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It looks like that's one of the things that boost::join does for you: http://stackoverflow.com/questions/1833447/a-good-example-for-boostalgorithmjoin – the_mandrill Sep 27 '10 at 15:10
4
boost::join
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1Without a good example, boost::join is a world of pain. The documentation assumes at least a litle familiarity with the Boost Range library. – Dan Hook Dec 02 '09 at 14:55