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Concatenate Strings from Objects

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Write a function getConcated(arr) that takes an array of objects arr and returns a string formed according to the following rules:

- Elements must be ordered by the order field in ascending order.
- Elements with expired: true must be excluded.
- The value field of each object must be reversed (characters in reverse order).
- The string should not contain duplicate characters.

Input 1: [{ value: "aabb", order: 1, expired: false }, { value: "bbaa", order: 2, expired: false }]

Output 1: "ba"

Input 2: [{ value: "hello", order: 1, expired: false }, { value: "world", order: 2, expired: false }]

Output 2: "olehdrw"

JavaScript•UTF-8

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