34 lines
787 B
JavaScript
34 lines
787 B
JavaScript
var baseFlatten = require('./_baseFlatten'),
|
|
toInteger = require('./toInteger');
|
|
|
|
/**
|
|
* Recursively flatten `array` up to `depth` times.
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @since 4.4.0
|
|
* @category Array
|
|
* @param {Array} array The array to flatten.
|
|
* @param {number} [depth=1] The maximum recursion depth.
|
|
* @returns {Array} Returns the new flattened array.
|
|
* @example
|
|
*
|
|
* var array = [1, [2, [3, [4]], 5]];
|
|
*
|
|
* _.flattenDepth(array, 1);
|
|
* // => [1, 2, [3, [4]], 5]
|
|
*
|
|
* _.flattenDepth(array, 2);
|
|
* // => [1, 2, 3, [4], 5]
|
|
*/
|
|
function flattenDepth(array, depth) {
|
|
var length = array == null ? 0 : array.length;
|
|
if (!length) {
|
|
return [];
|
|
}
|
|
depth = depth === undefined ? 1 : toInteger(depth);
|
|
return baseFlatten(array, depth);
|
|
}
|
|
|
|
module.exports = flattenDepth;
|