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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; | |