removeDuplicatesByProp.js

/*
 * Returns a new array without items whose property received is duplicated.
 *
 * @example
 * removeDuplicatesByProp([
 *   {id: 1, name: 'apple'},
 *   {id: 2, name: 'apple'},
 *   {id: 3, name: 'orange'}
 * ], 'name');
 * //=> [{id: 1, name: 'apple'}, {id: 3, name: 'orange'}]
 *
 * @param {T[]} objects - An array of objects.
 * @param {keyof T} prop - A property used for comparison.
 * @returns {T[]}
 * @template T
 */
const removeDuplicatesByProp = (objects, property) => {
  const values = new Set();

  return objects.filter(object => {
    const value = object[property];
    if (values.has(value))
      return false;
    values.add(value);
    return true;
  });
};


export default removeDuplicatesByProp;