I am experimenting with a more functional style in my JavaScript; therefore, I have replaced for loops with utility functions such as map and reduce.  However, I have not found a functional replacement for while loops since tail call optimization i...
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...
var mdflag; var count = 0;  document.addEventListener("mousedown",mdown,false);     document.addEventListener("mouseup",mup,false); }   function mdown() {     mdflag=true;     while(mdflag)     document.getElementById("testdiv"...
What are the benefits of using a while loop over a for loop?  When I'm iterating through arrays, I always use a for loop so I wondered if I'm missing something here.  I've never had a situation where a for loop doesn't do the job, bu...
I am trying to get into JQuery but am struggling a bit around.   What I'm trying to do is go through an array one click at a time so that each time I click on the "next" button a new item is presented.  Let's take a look at the follow...
I'm writing a condition check for a simple input via prompt() in JavaScript.  The idea is to repeat a prompt until the user supplies a positive integer.   In particular, if I submit a negative integer, it correctly prompts me again via case 3.  H...
My brain its going to explode.. why this dont work? im trying to animate a few divs with time interval and trying to write less code but this dont work      var cargaCont = function(){         o = 1;         var animacion = function(i){             $...
Question: How to continuously prompt user when age is invalid (below 0 above 200, or not-a-number)?       var userAge = prompt("Please enter your age"); while (isNaN(userAge)){     alert("That's not a number, please retry.");...
I'm tackling a project that requires me to use JavaScript with an API method call. I'm a Java programmer who has never done web development before so I'm having some trouble with it.  This API method is asynchronous and it's in a whil...
The while loop  Test the condition and if it is true, then execute the code  The do..while loop  Execute first time. Then test and execute.  So the difference between while and do..while is , programmatically In while, one test is carried out more th...

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