| Leo Repp | 58b9f11 | 2021-11-22 11:57:47 +0100 | [diff] [blame^] | 1 | var baseIteratee = require('./_baseIteratee'), |
| 2 | baseUniq = require('./_baseUniq'); |
| 3 | |
| 4 | /** |
| 5 | * This method is like `_.uniq` except that it accepts `iteratee` which is |
| 6 | * invoked for each element in `array` to generate the criterion by which |
| 7 | * uniqueness is computed. The order of result values is determined by the |
| 8 | * order they occur in the array. The iteratee is invoked with one argument: |
| 9 | * (value). |
| 10 | * |
| 11 | * @static |
| 12 | * @memberOf _ |
| 13 | * @since 4.0.0 |
| 14 | * @category Array |
| 15 | * @param {Array} array The array to inspect. |
| 16 | * @param {Function} [iteratee=_.identity] The iteratee invoked per element. |
| 17 | * @returns {Array} Returns the new duplicate free array. |
| 18 | * @example |
| 19 | * |
| 20 | * _.uniqBy([2.1, 1.2, 2.3], Math.floor); |
| 21 | * // => [2.1, 1.2] |
| 22 | * |
| 23 | * // The `_.property` iteratee shorthand. |
| 24 | * _.uniqBy([{ 'x': 1 }, { 'x': 2 }, { 'x': 1 }], 'x'); |
| 25 | * // => [{ 'x': 1 }, { 'x': 2 }] |
| 26 | */ |
| 27 | function uniqBy(array, iteratee) { |
| 28 | return (array && array.length) ? baseUniq(array, baseIteratee(iteratee, 2)) : []; |
| 29 | } |
| 30 | |
| 31 | module.exports = uniqBy; |