PatrickEifler

let curr = 0;

const circle (arr, dir) => {
  curr = (curr + arr.length + (dir ? -1 : 1)) % arr.length;
}

PatrickEifler

# Easy Recursive Functions

## Factorial
```
const factorial = n => n > 1 ? n * factorial(n-1) : 1;

```

## Fibonacci
```