画箭头的函数，这是为了方便大家能够更方便地做好每一个需要用到这个小函数的程序服务的，可能此函数的功能比较小，请多多包涵-painted arrow functions, This is to facilitate more convenient to be able to do everything one needs to play this small function of the procedure, This function may function relatively small, please bear with me