String Permutations

Function Name: generatePermutations

Description

Write a function that takes a single string parameter and returns all possible permutations of the characters in the string.

The string will contain only unique characters and will not be empty.

The permutations can be returned in any order.

If the string is a single character, the function should return an array containing just that character.

Requirements

• The function 'generatePermutations' must accept a single parameter: a string.
• The function must return an array of strings containing all the permutations of the input string.
• All characters in the input string are unique.
• The function must handle strings of different lengths, including single-character strings.
• The function must not use any libraries or built-in permutation functions.

Examples

If the input string is 'ab', the function might return ['ab', 'ba'].If the input string is 'a', the function should return ['a'].If the input string is 'abc', the function might return ['abc', 'acb', 'bac', 'bca', 'cab', 'cba'].

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