How can I loop through all the entries in an array using JavaScript?  I thought it was something like this:  forEach(instance in theArray)   Where theArray is my array, but this seems to be incorrect....
I've heard this quite a few times. Are JavaScript loops really faster when counting backward? If so, why? I've seen a few test suite examples showing that reversed loops are quicker, but I can't find any explanation as to why!  I'm...
Closures in a loop are causing me problems. I think I have to make another function that returns a function to solve the problem, but I can't get it to work with my jQuery code.  Here is the basic problem in a simplified form:  function foo(val...
How can I break the iteration on reduce method?  for  for (var i = Things.length - 1; i >= 0; i--) {   if(Things[i] <= 0){     break;   } };   reduce  Things.reduce(function(memo, current){   if(current <= 0){     //break ???     //return;...
I'm reading the Mozilla developer's site on closures, and I noticed in their example for common mistakes, they had this code:  <p id="help">Helpful notes will appear here</p>   <p>E-mail: <input type="text&#...
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How can I loop through all the entries in an array using JavaScript?  I thought it was something like this:  forEach(instance in theArray)   Where theArray is my array, but this seems to be incorrect....
Is there an easy way to slow down the iteration in a forEach (with plain javascript)? For example:  var items = document.querySelector('.item');  items.forEach(function(el) {   // do stuff with el and pause before the next el; });...

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