Make a javascript function that generates a sequential number on each execution?

Question

So i'd like to make a function that sequentially generates a number each execution, I was wondering how to do this in Javascript I need this to basically set an order to my items in mongoDB. How can I write a JS function that generates a number sequentially each time it's run? ex: 1... then run the function again...2 then again...3.

• Delgan: stackoverflow.com/questions/2282140/…
• Kuba Wyrostek: yield is still (too) rare in JavaScript implementations.
• Blakes Seven: The "sad" thing here is that the mongodb tag in the question leads me to believe you actually wanted this: Create an Auto-Incrementing Sequence Field, yet just got "owned" for lack of research and asking more in terms of a javascript question than explaining what you were going to use it for.
• user3649245: @BlakesSeven how did I get owned?

Answer 1

var next = (function() {
 var v = 0;
 return function() {
 return v++;
}})();
console.log(next()); // 0
console.log(next()); // 1
console.log(next()); // 2