var arrayMap = require('./internal/arrayMap'),
    baseAt = require('./internal/baseAt'),
    baseFlatten = require('./internal/baseFlatten'),
    basePullAt = require('./internal/basePullAt'),
    compareAscending = require('./internal/compareAscending'),
    rest = require('./rest');

/**
 * Removes elements from `array` corresponding to `indexes` and returns an
 * array of removed elements.
 *
 * **Note:** Unlike `_.at`, this method mutates `array`.
 *
 * @static
 * @memberOf _
 * @category Array
 * @param {Array} array The array to modify.
 * @param {...(number|number[])} [indexes] The indexes of elements to remove,
 *  specified individually or in arrays.
 * @returns {Array} Returns the new array of removed elements.
 * @example
 *
 * var array = [5, 10, 15, 20];
 * var evens = _.pullAt(array, 1, 3);
 *
 * console.log(array);
 * // => [5, 15]
 *
 * console.log(evens);
 * // => [10, 20]
 */
var pullAt = rest(function(array, indexes) {
  indexes = arrayMap(baseFlatten(indexes), String);

  var result = baseAt(array, indexes);
  basePullAt(array, indexes.sort(compareAscending));
  return result;
});

module.exports = pullAt;
