Make a class in a module

class.js

/**
 * use underscore js because its useful
 */
var _ = require('underscore');

/**
 * Constructor -- `new Class('frosted')`
 */
function Class(prop) {
  this.prop = prop;
}

/**
 * this method won't be visible outside this file
 */
function _privateMethod(param) {
  return param + ' butts';
}

/**
 * add some instance methods to the prototype
 */
_.extend(Class.prototype, {

  /**
   * accessible via `new Class('frosted').method()`
   */
  method: function () {
    return _privateMethod(this.prop);
  }

});

/**
 * add some static methods to the class
 */
_.extend(Class, {

  /**
   * accessible via `Class.static_method()`
   */
  static_method: function (param) {
    return _privateMethod(param);
  }

});

/**
 * export the constructor function
 */
exports = Class;