Is there a way to implement analog of Python's 'separator'.join() in C++?

Question

All I\'ve found is boost::algorithm::string::join. However, it seems like overkill to use Boost only for join. So maybe there are some time-tested recipes?

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Answer 1

If you really want ''.join(), you can use std::copy with an std::ostream_iterator to a std::stringstream.

#include  // for std::copy
#include   // for std::ostream_iterator

std::vector values(); // initialize these
std::stringstream buffer;
std::copy(values.begin(), values.end(), std::ostream_iterator(buffer));

This will insert all the values to buffer. You can also specify a custom separator for std::ostream_iterator but this will get appended at the end (this is the significant difference to join). If you don't want a separator, this will do just what you want.