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30 lines
812 B
JavaScript
30 lines
812 B
JavaScript
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var baseFlatten = require('./_baseFlatten'),
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map = require('./map');
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/**
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* Creates a flattened array of values by running each element in `collection`
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* thru `iteratee` and flattening the mapped results. The iteratee is invoked
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* with three arguments: (value, index|key, collection).
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*
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* @static
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* @memberOf _
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* @since 4.0.0
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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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* @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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* _.flatMap([1, 2], duplicate);
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* // => [1, 1, 2, 2]
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*/
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function flatMap(collection, iteratee) {
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return baseFlatten(map(collection, iteratee), 1);
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}
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module.exports = flatMap;
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