servo.attach(pin) //连接伺服电机的信号线于控制板的引脚,9或10号引脚servo.attach(pin, min, max) servo: a variable of type Servo pin: the number of the pin that the servo is attached to min (optional): the pulse width, in microseconds, corresponding to the minimum (0-degre
三者都有把元素移除的作用,但细微的差别,造就了它们的使命不同. 最权威的解释当然是jQuery_API咯,下面是API中关于他三儿的部分截取. 一.empty: This method removes not only child (and other descendant) elements, but also any text within the set of matched elements. This is because, according to the DOM specifica
Many times, we often needs to detach our databases if we want to copy it to another database instances,or even another machine, here is a simple t-sql command: EXEC sp_detach_db 'AdventureWorks2012', 'true'; Ref: msdn and stackoverflow