joseanpg

var Ajax = (function (){

    function AjaxXMLHTTPRequest(){}
    AjaxXMLHTTPRequest.prototype = {...};

    function AjaxActiveX(){}
    AjaxActiveX.prototype = {};

    return  (typeof window.ActiveXObject === 'undefined') ? 
                           AjaxXMLHTTPRequest:

joseanpg

function aplaneitor2(arr,sep){
  return function step(a){return Array.isArray(a) ? a.map(step).join(sep) : a}(arr);
}

var test = ["hola", ["soy", ["juan", "fernandez"] ], "y", ["no", "tengo", ["dinero"] ] ];
console.log(aplaneitor2(test,'**')) // -> hola**soy**juan**fernandez**y**no**tengo**dinero

joseanpg

function esArray(array) {
  return Object.prototype.toString.call(array) == '[object Array]'); 
} 

function desempaqueta(array,index) {
   Array.prototype.splice.apply(array, [index, 1].concat(array[index]));
}

function flatten(arr) {
  arr = arr.concat();

joseanpg

/*
http://twitter.com/#!/bga_/status/116861871423885312
*/


Object.prototype.thunk = function(name, calc) {
  Object.defineProperty(this,name,{get: function() { 
    var ret = calc();
    delete this[name] // memo result
    this[name] = ret;