http://www.imooc.com/video/7557
04:34时的function we(callback,something){
something+='is cool'
callback(something) ----这里的callback()是从哪里来的?有人能回答么?
}
04:34时的function we(callback,something){
something+='is cool'
callback(something) ----这里的callback()是从哪里来的?有人能回答么?
}
2016-07-02