What is the best way to do loops in JavaScript

Question

I have stumbled into several methods of looping in JavaScript, what I like the most is:

for(var i = 0; i < a.length; i++){
    var element = a[i];
}
         


        

Answer 1

I don't use it myself, but one of my colleagues uses this style:

var myArray = [1,2,3,4];
for (var i = 0, item; item = myArray[i]; ++i) {
    alert(item);
}

like Ash's answer, this will hit issues if you've got "falsey" values in your array. To avoid that problem change it to (item = myArray[i]) != undefined