The primitive types (number, string, etc.) are passed by value, but objects are unknown, because they can be both passed-by-value (in case we consider that a variable holding an object is in fact a reference to the object) and passed-by-reference (...
I was trying to understand passing of variables and objects in JavaScript, and came across this page.  It is explained that JavaScript objects are passed by value, but the value itself is a reference. Though I understood what was happening in the exa...
We all know JS has objects and a group of primitives.  Let's examine the following assignments.  a = 'foo'; b = a; c = 'foo' a === b; //true a = b = c = undefined;   The way I visualize the variable assignment process in JS for ye...
I found that there are these two ways that a variable property value can be updated on a function call  Example 1:    function bar( arg ) {   return arg + 1; }  var foo = {   num: 1 };  foo.num = bar( foo.num ); console.log( foo.num );     Example 2:...
I can't figure out how to pass an argument by value in JavaScript to onClick-function. I have been trying with closure functions but it doesn't seem to work!! aah  ...  for(var i=0; i<=15; i++){     blockNr++;     meal = getMealByCategory(...
I'm developing a game using Node.js ; I have a Bot class containing a position attribute and a fire method. This method acts as follow:  Bot.prototype.fire = function () {     this.bombs.push(new Bomb(this.position)); };   Obviously, the bomb'...
I'm in the process of watching some intro type videos on nodejs. I ran into a problem which i figured out but i want to understand the "why". Here is the original code which had the issue:      var http = require("http");     var...
I just can't understand how variables are passed, why are some passed by reference while other by value?  Example:  var a=4; var b=a; b=b++; alert(a);//unmodified 4  var c=["t","ttt"]; var d=c; d=d.sort(function(x,y){return (y.len...

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