I'm a bit confused with JavaScript's delete operator. Take the following piece of code:  var obj = {     helloText: "Hello World!" };  var foo = obj;  delete obj;   After this piece of code has been executed, obj is null, but foo st...
I'm trying to have both the variables "my_a" and letters.a point to the same object.  //i want letters.a to reference (point to) my_a, not be a copy... //expected output should be: letters.a = c //made variables into Objects.. but didn...
Is there any way for a variable to act as a reference to another variable? Could I have multiples variable all hold the same information regarding a single piece of data?  For example:  var foo = "data"; var bar = foo;  // I want this to set...
<html>  <head> <title>Question</title> <script type="text/javascript" > function MouseOverHand(ID) { var Cursor='hand'; var ID=ID; if (!document.all){ Cursor='pointer'; } document.getElementById(I...
Is there any way I can be less verbose in Javascript by pointing a local variable by to an objects property?  For instance in PHP I can do this:  $obj->subobject->property = 'Foo'; $property =& $obj->subobject->property; $prop...
Javascript passes objects by reference. This makes perfect sense. But once you start manipulating those objects, everything acts in a way that seem unintuitive. Let me offer an example:  var a, b;  a = {} b = a; a['one'] = {};  console.log( J...
I have a generic question about javascript specification or implementation of functions pointer (delegates?) which are points to object methods.  Please, read the following code snippet. Here we have an object with a method using 'this' to ac...
Take a look at the following code:  var o;  (function (p) {     p = function () {         alert('test');     }; })(o);  o(); // Error: 'o is not a function'   In the above function I am creating an anonymous function that takes one pa...
In C, when there are variables (assume both as int) i less than j, we can use the equation    i^=j^=i^=j   to exchange the value of the two variables. For example, let int i = 3, j = 5; after computed i^=j^=i^=j, I have i = 5, j = 3.  However, if I u...
I just started using javascript and I'm missing something important in my knowledge.  I was hoping you could help me fill in the gap.  So the script I'm trying to run is suppose to count the characters in a text field, and update a paragraph...

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