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DIY: Monotonic Array

Understand how to identify monotonic arrays by implementing a Ruby function that checks whether elements are consistently increasing or decreasing. This lesson helps you develop problem-solving skills applicable to coding interviews and real-world scenarios like Netflix feature optimizations.

Problem statement

An array is monotonic if it is either monotone increasing or monotone decreasing.

An array, arr, is monotone increasing if arr[i] <= arr[i + 1] for every element at each index i. ...