You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
32 lines
901 B
32 lines
901 B
3 years ago
|
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;
|