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1
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var baseFlatten = require('./_baseFlatten'),
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2
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map = require('./map');
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3
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4
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/** Used as references for various `Number` constants. */
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5
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var INFINITY = 1 / 0;
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6
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7
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/**
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8
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* This method is like `_.flatMap` except that it recursively flattens the
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9
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* mapped results.
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10
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*
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11
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* @static
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12
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* @memberOf _
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13
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* @since 4.7.0
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14
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* @category Collection
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15
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* @param {Array|Object} collection The collection to iterate over.
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16
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* @param {Function} [iteratee=_.identity] The function invoked per iteration.
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17
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* @returns {Array} Returns the new flattened array.
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18
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* @example
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19
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*
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20
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* function duplicate(n) {
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21
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* return [[[n, n]]];
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22
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* }
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23
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*
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24
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* _.flatMapDeep([1, 2], duplicate);
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25
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* // => [1, 1, 2, 2]
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26
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*/
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27
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function flatMapDeep(collection, iteratee) {
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28
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return baseFlatten(map(collection, iteratee), INFINITY);
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29
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}
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30
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31
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module.exports = flatMapDeep;
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