Mini Peaks

Published by Helen Yu in

Write a function that returns all the elements in an array that are strictly greater than their adjacent left and right neighbors.

Examples

miniPeaks([4, 5, 2, 1, 4, 9, 7, 2]) ➞ [5, 9]
// 5 has neighbours 4 and 2, both are less than 5.

miniPeaks([1, 2, 1, 1, 3, 2, 5, 4, 4]) ➞ [2, 3, 5]

miniPeaks([1, 2, 3, 4, 5, 6]) ➞ []

Notes

  • Do not count boundary numbers, since they only have one left/right neighbor.
  • If no such numbers exist, return an empty array.
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