| 1 | import baseFlatten from './_baseFlatten.js';
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| 2 | import map from './map.js';
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| 3 |
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| 4 | /**
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| 5 | * Creates a flattened array of values by running each element in `collection`
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| 6 | * thru `iteratee` and flattening the mapped results. The iteratee is invoked
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| 7 | * with three arguments: (value, index|key, collection).
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| 8 | *
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| 9 | * @static
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| 10 | * @memberOf _
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| 11 | * @since 4.0.0
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| 12 | * @category Collection
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| 13 | * @param {Array|Object} collection The collection to iterate over.
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| 14 | * @param {Function} [iteratee=_.identity] The function invoked per iteration.
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| 15 | * @returns {Array} Returns the new flattened array.
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| 16 | * @example
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| 17 | *
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| 18 | * function duplicate(n) {
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| 19 | * return [n, n];
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| 20 | * }
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| 21 | *
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| 22 | * _.flatMap([1, 2], duplicate);
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| 23 | * // => [1, 1, 2, 2]
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| 24 | */
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| 25 | function flatMap(collection, iteratee) {
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| 26 | return baseFlatten(map(collection, iteratee), 1);
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| 27 | }
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| 28 |
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| 29 | export default flatMap;
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