Function ContainsElement

Bcore/src/main/cpp/base/stl_util.h:117–123

// Search for an element with the specified value and return true if it was found, false otherwise.
template <typename Container, typename T>
bool ContainsElement(const Container& container, const T& value, size_t start_pos = 0u) {
  DCHECK_LE(start_pos, container.size());
  auto start = container.begin();
  std::advance(start, start_pos);
  auto it = std::find(start, container.end(), value);
  return it != container.end();
}

// 32-bit FNV-1a hash function suitable for std::unordered_map.
// It can be used with any container which works with range-based for loop.