undefined « object « Javascript Data Type Q&A

1. Deleteing JSON object from an array creates "undefined" objects    stackoverflow.com

i am haveing some problems with JSON and arrays. I have been messing around with JSON for a little while and am trying to use some in production by refactoring ...

2. Passing date to Date object results in an undefined variable in IE8    stackoverflow.com

I've been stuck on this for quite a while and would appreciate some help if possible. Basically I receive a date from an API in the format yyyy-mm-dd. Amongst other things, I ...

3. JavaScript: Testing variables for undefined value; testing whether object is array    stackoverflow.com

1. Is there a difference between typeof value === "undefined" and value === undefined?
2. Why did JavaScript need Array.isArray() in ECMAScript 5? Can't I just call value instanceof Array to determine whether an ...

4. Variable suddenly becomes undefined?    stackoverflow.com

I am trying to work out how to load some images in to javascript to work with the canvas. I figured that first I would take JSON object and process all ...

5. In javascript, which is better `var Obj = Obj || {}` or `if (Obj === 'undefined' || typeof Obj !== 'object')`    stackoverflow.com

I want to know which of these methods is better:

var Obj = Obj || {};

if (Obj === undefined || typeof Obj !== 'object') {
  Obj = {};
}

6. Javascript multidimentional array undefined object error    stackoverflow.com

I am trying to make a two dimensional array out of two one dimentional arrays with this code:

  var PassAssoArr = new Array();
  for(k in PassPourcentNames) {
   ...

7. Returning Associative Arrays/Objects with xajax- when called they are undefined    forums.devshed.com

Hello, Im racking my brains over this one. My aim is to call a function in php that builds a javascript associative array/object as a string. Returns this string by the xajax addScript method so my functions can use the new javascript array. My php code is as follows: Code: $xajax = new xajax(); $xajax->registerFunction("populateSearchCriteria"); function populateSearchCriteria($arg, $type) { // build ...