Example 9-1. A simple JavaScript class

// range.js: A class representing a range of values.
// This is a factory function that returns a new range object.

function range(from, to)
{
// Use the inherit() function to create an object that inherits from the
// prototype object defined below. The prototype object is stored as
   ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~在哪里？
// a property of this function, and defines the shared methods (behavior)
// for all range objects.
var r = inherit(range.methods);
// Store the start and end points (state) of this new range object.
// These are noninherited properties that are unique to this object.
r.from = from;
r.to = to;
// Finally return the new object
return r;
}

// This prototype object defines methods inherited by all range objects.
// 下面的定义是一个对象直接量啊， 到底是定义的一个“range.methods”对象（对象不能这么命名吧），还是定义range对象的methods属性？ prototype object到底是指啥？
range.methods =
{

// Return true if x is in the range, false otherwise
// This method works for textual and Date ranges as well as numeric.
includes: function(x) { return this.from <= x && x <= this.to; },
// Invoke f once for each integer in the range.
// This method works only for numeric ranges.
foreach: function(f) {
for(var x = Math.ceil(this.from); x <= this.to; x++) f(x);
},
// Return a string representation of the range
toString: function() { return "(" + this.from + "..." + this.to + ")"; }

};
--
修改:zhanghaoX FROM 111.196.70.*
FROM 111.196.70.*