如何覆盖Request.js模块中Qs.js模块中的函数？

Question

我需要重写位于另一个模块，我帮助功能stringifyArray Qs.js。怎么样？

https://github.com/hapijs/qs

https://github.com/mikeal/request/blob/master/request.js

实施例：

var request = require('request'); 


request.qs.stringifyArray = function (arr, prefix) { 
var ret = []; 
if (!prefix) throw new TypeError('stringify expects an object'); 
for (var i = 0; i < arr.length; i++) { 
    ret.push(this.stringify(arr[i], prefix)); 
} 
return ret.join('&'); 
};` 

Answer 1

我的解决办法是倍率（request.Request.prototype.qs）

var qs = require('qs'), 
request = require('request'), 
url = require('url'); 

var stringify; 
var toString = Object.prototype.toString; 

var isArray = Array.isArray || function (arr) { 
return toString.call(arr) === '[object Array]'; 
}; 

var objectKeys = Object.keys || function (obj) { 
var ret = []; 
for (var key in obj) { 
    if (obj.hasOwnProperty(key)) { 
     ret.push(key); 
    } 
} 
return ret; 
}; 

var stringifyString = function (str, prefix) { 
if (!prefix) throw new TypeError('stringify expects an object'); 
return prefix + '=' + encodeURIComponent(str); 
}; 

var stringifyArray = function (arr, prefix) { 
var ret = []; 
if (!prefix) throw new TypeError('stringify expects an object'); 
for (var i = 0; i < arr.length; i++) { 
    ret.push(stringify(arr[i], prefix)); 
} 
return ret.join('&'); 
}; 

function stringifyObject(obj, prefix) { 
var ret = []; 
var keys = objectKeys(obj); 
var key; 

for (var i = 0, len = keys.length; i < len; ++i) { 

    key = keys[i]; 

    if ('' === key) { 
     continue; 
    } 

    if (null === obj[key]) { 
     ret.push(encodeURIComponent(key) + '='); 

    } else { 
     ret.push(stringify(obj[key], prefix ? prefix + '[' + encodeURIComponent(key) + ']' :  encodeURIComponent(key))); 
    } 
} 

return ret.join('&'); 
} 

stringify = function (obj, prefix) { 
if (isArray(obj)) { 
    return stringifyArray(obj, prefix); 
} else if ('[object Object]' === toString.call(obj)) { 
    return stringifyObject(obj, prefix); 
} else if ('string' === typeof obj) { 
    return stringifyString(obj, prefix); 
} else { 
    return prefix + '=' + encodeURIComponent(String(obj)); 
} 
}; 

并重写prototype.qs：

request.Request.prototype.qs = function (q, clobber) { 
var base; 

if (!clobber && this.uri.query) { 
    base = qs.parse(this.uri.query) 
} 
else { 
    base = {} 
} 

for (var i in q) { 
    base[i] = q[i] 
} 

if (stringify(base) === '') { 
    return this 
} 

this.uri = url.parse(this.uri.href.split('?')[0] + '?' + stringify(base)); 
this.url = this.uri; 
this.path = this.uri.path; 

return this; 
};