AI solution for JavaScript Coding Question on BFE.dev
155. create a count function

Here's one possible solution:

function count() {
  var counter = 0;
  return function() {
    return ++counter;
  }
}

count.reset = function() {
  count.counter = 0;
}

var c = count();

console.log(c()); // 1
console.log(c()); // 2
console.log(c()); // 3
c.reset();
console.log(c()); // 1
console.log(c()); // 2
console.log(c()); // 3

In this solution, count() creates a closure that holds a private counter variable which is incremented every time the returned function is called. We then attach a reset method to the count function object that sets the counter to 0. Finally, we create an instance of the count() closure and use it to keep track of the count.