精选优质文档-倾情为你奉上JavaScriptWhen I was a young journeyman programmer, I would learn about every feature of the languages I was using, and I would attempt to use all of those features when I wrote. I suppose it was a way of showing off, and I suppose it worked because I was the guy you went to if you wanted to know how to use a particular feature.Eventually I figured out that some of those features were more trouble than they were worth. Some of them were poorly specified, and so were more l