The answer is no (you can’t use remove_if on associative containers). You need to do a simple loop; the erase(iterator) member now returns the next valid iterator – so your loop becomes: for(auto it = begin(m_map); it != end(m_map);) { if (it->second == 0) { it = m_map.erase(it); // previously this was something like m_map.erase(it++); … Read more
You should not use the delete method on the Paragraphobject, but instead use the delete method of paragraphs relation, like this: post.paragraphs.delete(Paragraph.find(paragraph_id))
You need to call erase on the iterator returned from remove_if, It should look something like this: auto new_end = std::remove_if(MyDisplayDevices.begin(), MyDisplayDevices.end(), [](const DisplayDevice3d& device) { return device.Modes.size() == 0; }); MyDisplayDevices.erase(new_end, MyDisplayDevices.end());