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