Function count

src/include/nlohmann/json.hpp:2740–2744

@brief returns the number of occurrences of a key in a JSON object @sa https://json.nlohmann.me/api/basic_json/count/

    /// @brief returns the number of occurrences of a key in a JSON object
    /// @sa https://json.nlohmann.me/api/basic_json/count/
    size_type count(const typename object_t::key_type& key) const
    {
        // return 0 for all nonobject types
        return is_object() ? m_data.m_value.object->count(key) : 0;
    }

    /// @brief returns the number of occurrences of a key in a JSON object
    /// @sa https://json.nlohmann.me/api/basic_json/count/