The search function in the following code is not working and I believe it has something to do with the For...In loop but I am new to JS and unsure why:  var friends = { bill: {     firstName: "bill",     lastName: "smith",     number:...
Last night, I got really bored and I thought of a little idea for a little script. Basically I was thinking about how many built-in functions PHP has compared to JavaScript and then I realized that I really don't know how many functions JavaScrip...
I'm trying to figure out how to add an itertor to a javascript class such that the class could be used in a for...in loop. Following the instructions from Mozilla doesn't produce the results they claim it will. https://developer.mozilla.org/e...
What is the difference between for..in and for each..in statements in javascript? Are there subtle difference that I don't know of or is it the same and every browser has a different name for it?...
I'm having trouble understanding the way this for in loop works.   function createSimpleNode(name, options, text) {          var node = document.createElement(name);           for (var o in options) {                   node.setAttribute(o, option...
When I load my page, a nodeList gets created, and it looks like this:   [text, h4, text, span, br, input, br, span, br, input, br, span, br, input, br, span, br, input, br]   I created a simple for loop that loops through all these elements and delet...
I make use of a for in loop in a piece of JavaScript logic. Should I use the var keyword or not?  When I run a for-in loop as per W3School's example, without the var then, as a side effect, it gets defined as a property on the global scope (windo...
To return an array set with a sequence of random numbers between 1 and 500 I tried to refactor a standard for loop for(var i = 0; i< 50; i++) and that worked but when I tried to do a refactor using a for in loop it doesn't. My guess is that th...
I noticed that in Javascript a variable used as the index in a for..in loop will be always a string even if I define it the following way:  var s_array = new Array(); s_array[0] = 'foo'; s_array[1] = 'bar';  for(i in s_array){  alert(...

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