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 | /** Used as references for various `Number` constants. */
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5 | var INFINITY = 1 / 0;
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6 |
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7 | /**
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8 | * This method is like `_.flatMap` except that it recursively flattens the
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9 | * mapped results.
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10 | *
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11 | * @static
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12 | * @memberOf _
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13 | * @since 4.7.0
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14 | * @category Collection
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15 | * @param {Array|Object} collection The collection to iterate over.
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16 | * @param {Function} [iteratee=_.identity] The function invoked per iteration.
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17 | * @returns {Array} Returns the new flattened array.
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18 | * @example
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19 | *
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20 | * function duplicate(n) {
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21 | * return [[[n, n]]];
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22 | * }
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23 | *
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24 | * _.flatMapDeep([1, 2], duplicate);
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25 | * // => [1, 1, 2, 2]
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26 | */
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27 | function flatMapDeep(collection, iteratee) {
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28 | return baseFlatten(map(collection, iteratee), INFINITY);
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29 | }
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30 |
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31 | export default flatMapDeep;
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