我将以下内容保存在 test.js 中。它成功地在浏览器中扩展了Array，但它似乎不适用于node和require。有人可以解释这里出了什么问题吗？
(function() {
Array.prototype.max = function() {
return console.log("Array.prototype.max");
};
return Array.max = function() {
return console.log("Array.max");
};
}).call(this);
然后，从终端：
> My-MacBook-Pro: me$ node
> var test = require("./test")
> [1,2,3].max()
TypeError: Object 1,2,3 has no method 'max'
at [object Context]:1:9
at Interface.<anonymous> (repl.js:171:22)
at Interface.emit (events.js:64:17)
at Interface._onLine (readline.js:153:10)
at Interface._line (readline.js:408:8)
at Interface._ttyWrite (readline.js:585:14)
at ReadStream.<anonymous> (readline.js:73:12)
at ReadStream.emit (events.js:81:20)
at ReadStream._emitKey (tty_posix.js:307:10)
at ReadStream.onData (tty_posix.js:70:12)
> Array.max()
TypeError: Object function Array() { [native code] } has no method 'max'
at [object Context]:1:7
at Interface.<anonymous> (repl.js:171:22)
at Interface.emit (events.js:64:17)
at Interface._onLine (readline.js:153:10)
at Interface._line (readline.js:408:8)
at Interface._ttyWrite (readline.js:585:14)
at ReadStream.<anonymous> (readline.js:73:12)
at ReadStream.emit (events.js:81:20)
at ReadStream._emitKey (tty_posix.js:307:10)
at ReadStream.onData (tty_posix.js:70:12)
您可以创建一个包含扩展名的文件：
array.extensions.js
if(!Array.prototype.Last){
Array.prototype.Last = function(){
return this.slice(-1)[0];
}
}
if(!Array.prototype.First){
Array.prototype.First = function(){
return this[0];
}
}
然后将此文件包含到您的启动文件中。
app.js:
require('{path}/array.extensions');
var express = require('express');
/* rest of your code */
在启动时引用此文件一次就足以使用...
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