问在nodejs中将js对象写入文件(包括方法)？

EN

var toString = Object.prototype.toString;

function dump_object(obj) {
    var buff, prop;
    buff = [];
    for (prop in obj) {
        buff.push(dump_to_string(prop) + ': ' + dump_to_string(obj[prop]))
    }
    return '{' + buff.join(', ') + '}';
}

function dump_array(arr) {
    var buff, i, len;
    buff = [];
    for (i=0, len=arr.length; i<len; i++) {
        buff.push(dump_to_string(arr[i]));
    }
    return '[' + buff.join(', ') + ']';
}

function dump_to_string(obj) {
    if (toString.call(obj) == '[object Function]') {
        return obj.toString();
    } else if (toString.call(obj) == '[object Array]') {
        return dump_array(obj);
    } else if (toString.call(obj) == '[object String]') {
        return '"' + obj.replace('"', '\\"') + '"';
    } else if (obj === Object(obj)) {
        return dump_object(obj);
    }
    return obj.toString();
}

eval('var test = ' + dump_to_string(obj))

fs = require 'fs'
bson = require('bson').BSONPure.BSON

obj = {
  string: "test",
  func: (s) ->
    console.log s
}

fs.writeFile 'test.txt', bson.serialize(obj, false, false, true), (err) ->
  return console.log("Err : #{err}") if err
  fs.readFile 'test.txt', (err, file) ->
    return console.log("Err : #{err}") if err
    deserialized = bson.deserialize file, evalFunctions: true
    deserialized.func deserialized.string // Outputs 'text', as expected