1  /**
 2   * Checks value of `key` of each object in an array, and returns an array
 3   * of de-duplicated objects based on the value of `key`.
 4   * @param array The array to de-duplicate.
 5   * @param key The key to check for de-duplication.
 6   * @returns The de-duplicated array.
 7   */
 8  export default function <T>(array: T[], key: keyof T): T[] {
 9    return [...new Map(array.map((item) => [item[key], item])).values()];
10  }