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object Main { def main(args: Array[String]) { val site = "W3xue" :: ("Google" :: ("Baidu" :: Nil)) val nums = Nil println( "第一网站是 : " + site.head ) println( "最后一个网站是 : " + site.tail ) println( "查看列表 site 是否为空 : " + site.isEmpty ) println( "查看 nums 是否为空 : " + nums.isEmpty ) } }
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