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Grokking the Coding Interview Patterns in JavaScript

Solution: Next Permutation

Explore how to compute the next lexicographical permutation of an integer array using a two-pointer technique. This lesson helps you understand identifying pivot and successor elements, performing swaps, and reversing subarrays in-place with constant memory use, enabling efficient array rearrangements needed in coding interviews.

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Statement

Your task is to rearrange an array, nums, containing positive integers to form the next lexicographically greater permutationA permutation of an array of integers refers to any ordering of its elements into a sequence or linear arrangement.. This means finding the next permutation in the sequence of all possible arrangements sorted in dictionary order.

For example, given the array [4,5,6][4, 5, 6], the next permutation is [4,6,5][4, 6, 5]. In the same way, [5,6,4][5, 6, 4] becomes [6,4,5][6, 4, 5] ...