I am in a situation that needs be solve with this way; need convert a local variable to a global variable. There is an example returning image's real width and height which i found these method from this answer..  Need to convert local varialbes...
foo = "foobar"; var bar = function(){     var foo = foo || "";     return foo; } bar();`   This code gives a result empty string. Why cannot JS reassign a local variable with same name as a global variable? In other programming langua...
I somewhat new to Javascript and I'm stuck on this one item. Can someone please show me how to make a javascript variable only usable on the .js file that it is on.  EXAMPLE:  Say I have two .js files, PG1 & PG2. PG1 contains var channel = Ch...
I've been looking over some JavaScript code that is designed to be run in a performance-sensitive environment, mainly a game engine in mobile environments.  In many cases this code doesn't use local variables but instead prefers to use explic...
I have a quite complicated question to ask :)  I am currently working on a html5 canvas game. The variables which are specific to a map of the game are in a separate file (let's call it game.js), separated from the game engine (let's call it...
I need to replace all variables that contains specific string or integer values with other values. For example, replace the value of all variables that containsgnl.frwithnlg.com. In windbg (windbg being attached to the web browser process) this can b...
I would like to modify following code to list "hello world" from 'a' variable without passing it to function. Is it possible?  var a = "declared variable";  var fc = function () {   console.log(a); };  (function () {   var a =...
I have written the following function.  function obj() {      this.a; } obj.prototype.catch = function() {     alert('Catched') } obj.prototype.do = function() {     alert('called'); }   What i need is, to call  obj::catch()   after o...
I'm fairly new to closures in javascript (certainly when applying them to event handlers!), and trying to grasp the underlying principles leading to the behavior of this code:    function showClick() {   var clicks = 0   return function(e) {...

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