const expiryDate = { name: 'expiry_date', /** * Returns the earliest date that a credit card expiry can be * * @returns {String} expiry in MM/YY format */ _getMinExpiry() { const month = new Date().getMonth() + 1 const year = parseInt(new Date().getFullYear().toString().substr(-2), 10) return `${month}/${year}`.replace(/^([0-9])\//, '0$1/') }, /** * Validates that the given expiration is no earlier than the current date. * * @param {String} value - expiry in MM/YY format */ validator(value) { const targetValue = expiryDate._getMinExpiry() return Rules.after.validate(value, { targetValue, inclusion: true, format: 'MM/yy' }) } } 解释

这段代码定义了一个名为 `expiryDate` 的对象，它包含了两个属性和一个方法。其中：

1. `name` 属性指定了该对象代表的验证规则名称，为 `expiry_date`。

2. `_getMinExpiry()` 方法返回一个字符串，表示当前日期之后的最早的信用卡过期日期。方法内部使用了 JavaScript 内置的 `Date()` 对象获取当前的月份和年份，然后将年份处理为两位数的格式。

3. `validator` 属性是一个函数，用于验证给定的信用卡过期日期是否合法。该函数使用了 Vee-Validate 插件中的 `Rules.after.validate()` 方法，将传入的 `value` 参数与 `_getMinExpiry()` 方法返回的最早过期日期进行比较，确保传入的日期不早于最早过期日期。

`validator` 函数的参数 `value` 应该是一个形如 `MM/YY` 的字符串，表示信用卡过期的月份和年份。如果传入的日期早于最早过期日期，该函数会返回一个错误提示信息。

相关问题

给下列程序添加英文注释：namespace nav_core { /** * @class BaseGlobalPlanner * @brief Provides an interface for global planners used in navigation. All global planners written as plugins for the navigation stack must adhere to this interface. / class BaseGlobalPlanner{ public: /* * @brief Given a goal pose in the world, compute a plan * @param start The start pose * @param goal The goal pose * @param plan The plan... filled by the planner * @return True if a valid plan was found, false otherwise / virtual bool makePlan(const geometry_msgs::PoseStamped& start, const geometry_msgs::PoseStamped& goal, std::vector<geometry_msgs::PoseStamped>& plan) = 0; /* * @brief Given a goal pose in the world, compute a plan * @param start The start pose * @param goal The goal pose * @param plan The plan... filled by the planner * @param cost The plans calculated cost * @return True if a valid plan was found, false otherwise / virtual bool makePlan(const geometry_msgs::PoseStamped& start, const geometry_msgs::PoseStamped& goal, std::vector<geometry_msgs::PoseStamped>& plan, double& cost) { cost = 0; return makePlan(start, goal, plan); } /* * @brief Initialization function for the BaseGlobalPlanner * @param name The name of this planner * @param costmap_ros A pointer to the ROS wrapper of the costmap to use for planning / virtual void initialize(std::string name, costmap_2d::Costmap2DROS costmap_ros) = 0; /** * @brief Virtual destructor for the interface */ virtual ~BaseGlobalPlanner(){} protected: BaseGlobalPlanner(){} }; }; // namespace nav_core #endif // NAV_CORE_BASE_GLOBAL_PLANNER_H

/**
* @file base_global_planner.h
* @brief Provides an interface for global planners used in navigation.
* All global planners written as plugins for the navigation stack must adhere to this interface.
*/

namespace nav_core {
/**
* @class BaseGlobalPlanner
* @brief Provides an interface for global planners used in navigation.
* All global planners written as plugins for the navigation stack must adhere to this interface.
*/
class BaseGlobalPlanner{
public:
/**
* @brief Given a goal pose in the world, compute a plan
* @param start The start pose
* @param goal The goal pose
* @param plan The plan... filled by the planner
* @return True if a valid plan was found, false otherwise
*/
virtual bool makePlan(const geometry_msgs::PoseStamped& start, const geometry_msgs::PoseStamped& goal, std::vector<geometry_msgs::PoseStamped>& plan) = 0;

/**
* @brief Given a goal pose in the world, compute a plan
* @param start The start pose
* @param goal The goal pose
* @param plan The plan... filled by the planner
* @param cost The plans calculated cost
* @return True if a valid plan was found, false otherwise
*/
virtual bool makePlan(const geometry_msgs::PoseStamped& start, const geometry_msgs::PoseStamped& goal, std::vector<geometry_msgs::PoseStamped>& plan, double& cost) {
cost = 0;
return makePlan(start, goal, plan);
}

/**
* @brief Initialization function for the BaseGlobalPlanner
* @param name The name of this planner
* @param costmap_ros A pointer to the ROS wrapper of the costmap to use for planning
*/
virtual void initialize(std::string name, costmap_2d::Costmap2DROS costmap_ros) = 0;

/**
* @brief Virtual destructor for the interface
*/
virtual ~BaseGlobalPlanner(){}

protected:
BaseGlobalPlanner(){}
};
}; // namespace nav_core

#endif // NAV_CORE_BASE_GLOBAL_PLANNER_H

parasolid 的PK_linkage_m PK_ERROR_code_t PK_TOPOL_render_line ( /* received */ const int /*n_topols*/, /* number of entities */ const PK_TOPOL_t /*topols*/[], /* entities to rendered */ const PK_TRANSF_t /*topol_transfs*/[], /* applied transformations */ const PK_TRANSF_t /*view_transf*/, /* viewing transformation */ const PK_TOPOL_render_line_o_t * /*options*/ /* options structure [PF] */ ); 函数

`PK_TOPOL_render_line` 是一个在 Parasolid 几何核心库中的函数，用于绘制线条。下面是函数的详细信息：

PK_ERROR_code_t PK_TOPOL_render_line(
    const int n_topols,                  // 实体数量
    const PK_TOPOL_t topols[],           // 待绘制的实体
    const PK_TRANSF_t topol_transfs[],   // 实体的变换矩阵
    const PK_TRANSF_t view_transf,       // 视角变换矩阵
    const PK_TOPOL_render_line_o_t* options // 绘制选项
);

函数的输入参数如下：

- `n_topols`：待绘制实体的数量。
- `topols[]`：待绘制的实体数组。
- `topol_transfs[]`：每个实体的变换矩阵。
- `view_transf`：视角变换矩阵。
- `options`：绘制选项。

该函数的返回值为 `PK_ERROR_code_t` 类型，表示函数执行的结果。

该函数可以绘制多个线条，实体可以是线段、多段线等。在使用该函数时，需要先初始化绘图设备，然后调用该函数进行绘制。在调用该函数时，需要指定待绘制实体的数量、实体数组、每个实体的变换矩阵和视角变换矩阵等参数。同时，可以通过 `options` 参数指定绘制选项，比如线条颜色、线宽等等。具体的使用方法可以参考 Parasolid 的官方文档和示例代码。