filterOutNotNumericExample.cpp

std::vector<std::string> NumbersExtractor::filterOutNotNumericTokens(const std::vector<std::string> & tokens) const {
  std::vector<std::string> numericTokens;

  for (unsigned int i = 0; i < tokens.size(); ++i) {
    std::string token = tokens[i];

    if (isNotAnInteger(token)) {
      continue;
    }

    numericTokens.push_back(tokens[i]);

  return numericTokens;
}

bool NumbersExtractor::isNotAnInteger(const std::string & str) const {
  return ! StringUtils::isAnInteger(str);
}