文章浏览阅读353次。一: 守卫 var ch = ‘+’ ch match { case '+' => sign = 1 case '-' => sign = -1 case _ if Character.isDigit(ch) => digit = Character.digit(ch, 10) case _ => sign = 0}_case x :: y :: nil...
Graphene is rapid development in recent years, new materials, wide range of applications, graphene is divided into two kinds of graphene oxide and graphene. Graphene is also the worlds thinnest most hard nano-materials, it is almost complet...
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