添加調用者的引用到in-closure構造函數

Question

好吧，我在另一個函數中創建了一個閉包內的構造函數對象（爲了隱藏它與其他可能衝突的腳本）（這將在一瞬間變得清晰）。有沒有辦法給調用函數的引用添加到在封閉的構造函數：

// this can be located anywhere within a script 
(function() { 
    function SomeConstructor(param) { this.param = param; } 
    SomeConstructor.prototype.doSomething = function(a) { this.param = a; return this; } 
    SomeConstructor.prototype.getParam = function() { return this.param } 
    // SomeConstructor.prototype.someFunct = ??? 

    return function someFunct(param) { 
     if (param instanceof SomeConstructor) { 
      return param; 
     } 
     else if (param) { 
      return new SomeConstructor(param); 
     } 
    } 
}()); 

我需要參考的原因，所以我可以someFunct之間的鏈條，它的構造的對象：

someFunct("A").doSomething("a").someFunct("B").doSomething("a").getParam(); 

請注意我需要保留instanceof檢查，從而規定了以下功能：

// 1: The inner call creates a new instance of SomeConstructor 
// 2: The 2nd(wrapping) call returns the inner calls instance 
//  instead of creating a new isntance 
var a = someFunct(someFunct("b")); 

Answer 1

分配該函數的原型，然後再屬性返回該屬性：

(function() { 
    function SomeConstructor(param) { this.param = param; } 
    SomeConstructor.prototype.doSomething = function(a) { this.param = a; return this; } 
    SomeConstructor.prototype.getParam = function() { return this.param } 
    SomeConstructor.prototype.someFunct = function someFunct(param) { 
    if (param) { 
      return new SomeConstructor(param); 
    } 
    } 

    return SomeConstructor.prototype.someFunct; 
}());