addUniqueItem

Adds an item to an array if it doesn't already exist.

Parameters

• value (unknown[]): The array to modify.
• item (unknown): The item to add to the array.

Returns

• object: An object containing:
  • array (unknown[]): The updated array.
  • message (string): A message indicating the result ('item added' or 'item already exist').

Usage

addUniqueItem([1, 2, 3], 4); // { array: [1, 2, 3, 4], message: 'item added' }
addUniqueItem([1, 2, 3], 2); // { array: [1, 2, 3], message: 'item already exist' }