HORIZON PROJECT

var baseIteratee = require('./_baseIteratee'),

    baseUniq = require('./_baseUniq');

/**

 * This method is like `_.uniq` except that it accepts `iteratee` which is

 * invoked for each element in `array` to generate the criterion by which

 * uniqueness is computed. The order of result values is determined by the

 * order they occur in the array. The iteratee is invoked with one argument:

 * (value).

 *

 * @static

 * @memberOf _

 * @since 4.0.0

 * @category Array

 * @param {Array} array The array to inspect.

 * @param {Function} [iteratee=_.identity] The iteratee invoked per element.

 * @returns {Array} Returns the new duplicate free array.

 * @example

 *

 * _.uniqBy([2.1, 1.2, 2.3], Math.floor);

 * // => [2.1, 1.2]

 *

 * // The `_.property` iteratee shorthand.

 * _.uniqBy([{ 'x': 1 }, { 'x': 2 }, { 'x': 1 }], 'x');

 * // => [{ 'x': 1 }, { 'x': 2 }]

 */

function uniqBy(array, iteratee) {

  return (array && array.length) ? baseUniq(array, baseIteratee(iteratee, 2)) : [];

}

module.exports = uniqBy;