# Introduction In this challenge, we will receive a string array and must reverse its elements in-place, without the use of extra space. This entails modifying the input array itself to reach the desired outcome. Our solution will involve writing a function named `reverseString`, exporting it to solve the problem. The function needs to accept an array `s` as input and reverse its elements. Please note that the test cases impose certain restrictions regarding the array length and allowed characters.
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