目录输入与输出输出输入Random方法方法调用的执行过程形参和实参的关系（重要重要！！）基本数据类型引用数据类型方法重载方法签名（了解即可）递归总结输入与输出
I\'m not thrilled with the argument-passing architecture I\'m evolving for the (many) Perl scripts that have been developed for some scripts that call various Hadoop MapReduce jobs.
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