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31 lines
901 B
JavaScript
31 lines
901 B
JavaScript
var baseFlatten = require('./_baseFlatten'),
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map = require('./map'),
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toInteger = require('./toInteger');
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/**
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* This method is like `_.flatMap` except that it recursively flattens the
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* mapped results up to `depth` times.
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*
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* @static
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* @memberOf _
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* @since 4.7.0
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* @category Collection
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* @param {Array|Object} collection The collection to iterate over.
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* @param {Function} [iteratee=_.identity] The function invoked per iteration.
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* @param {number} [depth=1] The maximum recursion depth.
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* @returns {Array} Returns the new flattened array.
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* @example
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*
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* function duplicate(n) {
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* return [[[n, n]]];
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* }
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*
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* _.flatMapDepth([1, 2], duplicate, 2);
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* // => [[1, 1], [2, 2]]
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*/
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function flatMapDepth(collection, iteratee, depth) {
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depth = depth === undefined ? 1 : toInteger(depth);
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return baseFlatten(map(collection, iteratee), depth);
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}
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module.exports = flatMapDepth;
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