Ruby has no method overloading, and both Ruby and Rails have all sorts of conventions for passing varargs or block (function) parameters.

Ruby没有方法重载，而且Ruby和Rails都有着各种各样的惯例用来传递varargs或者block (function)参数。

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To explain how scope interacts with overloading we will violate this practice and use a local function declaration.

但为了解释作用域与重载的相互作用，我们将违反上述规则而使用局部函数声明。

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To understand function overloading, we must understand how to define a set of overloaded functions and how the compiler decides which function to use for a given call.

要理解函数重载，必须理解如何定义一组重载函数和编译器如何决定对某一调用使用哪个函数。

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