The timer executes the callback function once every 2ms. Print the timer value,
When using lambda function, it can be printed many times (25 lines)
When a function is defined with 20 lines and then ca
Author: Jiang Jie, a member of Yibo Technology Expressway MediaSince the German physicist named Braun invented the first cathode ray tube oscilloscope in 1897, there are only two kinds of electronic e