Contains Duplicate II

Given an integer array `nums` and an integer `k`, return `true` _if there are two **distinct indices** _`i`_ and _`j`_ in the array such that _`nums[i] == nums[j]`_ and _`abs(i - j) <= k`.   **Example 1:** **Input:** nums = [1,2,3,1], k = 3 **Output:** true ``` **Example 2:** **Input:** nums = [1,0,1,1], k = 1 **Output:** true ``` **Example 3:** **Input:** nums = [1,2,3,1,2,3], k = 2 **Output:** false ```   **Constraints:** - `1 <= nums.length <= 105` - `-109 <= nums[i] <= 109` - `0 <= k <= 105`