Coding Challenge Practice - Question 76

The task is to implement a count property that increments every time count is accessed.

The boilerplate code:

function createCounter(): {count: number } {
  // your code here

}

When the count is accessed the first time, the getter is expected to return 0. So the initial state before the first access should be -1

let current = -1;

To increment count every time it is accessed, increase the value of current

return {
 get count() {
  current++;
  return current;
 }
}

Since a getter is being used, it cannot be increment manually i.e obj.count = 10 will fail.

The final code

function createCounter(): {count: number } {
  // your code here
  let current =  -1;

  return {
    get count() {
      current++;
      return current;
    }
  }
}

That's all folks!