Codility: MinAvgTwoSlice Solution

1function solution(A) {
2  let min = (minI = Infinity)
3  for (let i = 0; i < A.length - 1; i++) {
4    const avg = (A[i] + A[i + 1]) / 2
5    if (avg < min) {
6      min = avg
7      minI = i
8    }
9  }
10  for (let i = 0; i < A.length - 2; i++) {
11    const avg = (A[i] + A[i + 1] + A[i + 2]) / 3
12    if (avg < min) {
13      min = avg
14      minI = i
15    }
16  }
17  return minI
18}