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