I don’t understand below code why the “Math.abs(nums[pointer] % nums.length) == 0” could verify it is not a cycle because I think [3,3,3] is also a cycle, is it correct by the statement of the problem?

I think this part of the function `isNotCycle`

does not correctly identify all valid cycles according to the problem statement. It’s an edge case that the current function would not handle correctly.

// A function to detect a cycle doesn’t exist

public static boolean isNotCycle(int[] nums, boolean prevDirection, int pointer) {

// Set current direction to true if current element is positive, set false otherwise.

boolean currDirection = nums[pointer] >= 0;

// If current direction and previous direction are different or moving a pointer takes back to the same value,

// then the cycle is not possible, we return true, otherwise return false.

if (prevDirection != currDirection || Math.abs(nums[pointer] % nums.length) == 0) {

```
return true;
```

}

return false;

}

Course: Grokking Coding Interview Patterns in Java - Learn Interactively

Lesson: Solution: Circular Array Loop - Grokking Coding Interview Patterns in Java