You are given an array of numbers which increase up to a point and then decreases until the end of the array. Find the position where the array stops increasing any further and store it in a variable named peak.
Example
Input:
let numbers = [1, 2, 3, 5, 9, 4, 3, 2, 1]Expected value:
peak = 4
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Hint
The maximum number in the array will always be the peak.
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Solution
let numbers = [1, 2, 3, 5, 9, 4, 3, 2, 1]
let maxNumber = numbers.max()!
let peak = numbers.index(of: maxNumber)![collapse]
