<ul data-eligibleForWebStory="true">To reverse an array in-place without using built-in methods, use a two-pointer approach.The process involves shrinking the window and reversing step by step.This logic mirrors the process of comparing the first and last characters of a word to check for palindromes.A challenge example provided is reversing 'Sham' to 'mahs.'Engaging in such challenges can help in developing problem-solving skills.