Sliding Sum

Create a function that returns the subarrays of n consecutive elements from the original element that sum up to k. The function will have the following form: slidingSum(arr, n, k)

To illustrate:

slidingSum([3, 4, 1, 9, 9, 0, 3, 5, 4], 3, 8) ➞ [[3, 4, 1], [0, 3, 5]]
// Where [3, 4, 1] and [0, 3, 5] are the only subarrays that sum to 8 with length 3.

Examples

slidingSum([1, 4, 2, 3, 5, 0], 2, 5) ➞ [[1, 4], [2, 3], [5, 0]]

slidingSum([5, 5, 5, 5, 5], 1, 5) ➞ [[5], [5], [5], [5], [5]]

slidingSum([5, 5, 5, 5, 5], 5, 24) ➞ []

Notes

Return an empty array if no subarrays satisfy the (n,k) condition.