Trying to bend by head around Javascript's take on OO...and, like many others, running into confusion about the constructor property. In particular, the significance of the constructor property, as I can't seem to make it have any effect. E...
I'm trying to create a constructor for a blogging platform and it has many async operations going on inside. These range from grabbing the posts from directories, parsing them, sending them through template engines, etc.  So my question is, wou...
I've:  function Obj1(param) {     this.test1 = param || 1;  }  function Obj2(param, par) {     this.test2 = param;  }   now when I do:  Obj2.prototype = new Obj1(44); var obj = new Obj2(55);  alert(obj.constructor)    I have:  function Obj1(param...
After reading this SO Question, I'm still a little confused as to what Array.apply is actually doing. Consider the following snippet:  new Array(5).map(function(){   return new Array(5); });   I expect this to init an array with 5 undefined entri...
I am trying to call a method from the constructor of my javascript constructor, is this possible and if so, I can't seem to get it working, any insight would be great! Thanks!  function ValidateFields(pFormID){     var aForm = document.getElement...
function F() {     return function() {         return {};     } }  var f = new F(); f instanceof F; // returns false   As far as I understand, if I want instanceof to work, I need to return this from the constructor. But I want the constructor to ret...
I've created an example to illustrate:  // this is the parent class function animal() { console.log('animal constructor') }  // allow animals to walk animal.prototype.walk = function() { console.log('animal walking') }  // create...
If I have a javascript class which cannot be instantiated what should the constructor return that I can test for. The constructor always returns an object so I cannot return null if the constructor fails.  function SomeClass(id) {   if(typeof(id) ===...
There's an old trick (that I learned on SO) to catch calling a constructor as a function, i.e. forgetting the new keyword. The following, or something like, it goes in each constructor at the top.  if (!(this instanceof arguments.callee)) {     t...

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